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6,208 results on '"Université de Cergy Pontoise (UCP)"'

1. Rheological Behaviour of Cementitious Materials Incorporating Solid–Solid Phase Change Materials

Author

Lionel Plancher, Alexandre Pierre, Giao T. M. Nguyen, Ronan L. Hébert, Béatrice A. Ledésert, Patrick Di Martino, Yannick Mélinge, Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Technology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Article, [SPI.MAT]Engineering Sciences [physics]/Materials, Phase Change Materials, General Materials Science, ComputingMilieux_MISCELLANEOUS, Microscopy, QC120-168.85, phase change materials, cementitious materials, rheology, QH201-278.5, Engineering (General). Civil engineering (General), 021001 nanoscience & nanotechnology, TK1-9971, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Descriptive and experimental mechanics, 13. Climate action, Electrical engineering. Electronics. Nuclear engineering, TA1-2040, 0210 nano-technology
Abstract

Nowadays, thermal regulation of the indoor environment is mandatory to reduce greenhouse gas emissions. The incorporation of Phase Change Materials (PCMs) and especially solid–solid PCMs (s/s PCMs) into building materials can be a major step forward in reducing energy consumption. Such materials are used for their high latent heat to save and release heat during phase change. To integrate these products in the fabrication of cementitious materials, it is essential to predict their influence on the rheological behaviour of construction materials. In this work, rheological measurements were carried out on composite suspensions made of cement or mortar plus s/s PCMs. Results showed that the fitting of the Herschel–Bulkley model with a constant value of flow exponent was reliable. The s/s PCMs influenced the consistency and the yield strength values, with the yield strength value being only slightly affected. The adaptation of an existing viscosity model is proposed to predict the consistency value of suspensions. Finally, an innovative approach to predict the flow behaviour is proposed and we highlight the research needs to mainstream the use of s/s PCMs in construction materials.

Published
2021
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2. Study of a binder based on alkaline activated limestone

Author

Annelise Cousture, Khadim Ndiaye, Norbert Renault, Jean-Louis Gallias, Laboratoire de mécanique et matériaux du génie civil (L2MGC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Thermogravimetric analysis, Materials science, 02 engineering and technology, Raw material, engineering.material, 010402 general chemistry, 01 natural sciences, Portlandite, [SPI.MAT]Engineering Sciences [physics]/Materials, chemistry.chemical_compound, General Materials Science, ComputingMilieux_MISCELLANEOUS, Civil and Structural Engineering, Aqueous solution, Building and Construction, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Compressive strength, chemistry, Chemical engineering, Sodium hydroxide, Reagent, engineering, Mortar, [SPI.GCIV.MAT]Engineering Sciences [physics]/Civil Engineering/Matériaux composites et construction, 0210 nano-technology
Abstract

Binders based on the alkaline activation of raw materials is a subject of increasing importance for construction. This study focuses on a new non-hydraulic binder based on the alkali-activation of limestone by an aqueous solution of sodium hydroxide. An optimized mortar of about 20 MPa compressive strength, made with siliceous sand, was studied by XRD, FTIR and SEM-EDX analyses showing that crystalline pirssonite and portlandite are the reaction products responsible of the cohesive capacity of the binder. A methodology based on thermal gravimetric analysis was applied to quantify the products formed and the consumption of reagents with high reliability.

Published
2021

3. Oxidative biodegradation of a solid-solid polyether-urethane phase change material by Penicillium and Aspergillus

Author

Ronan L. Hébert, Yannick Mélinge, Giao T. M. Nguyen, Lionel Plancher, Béatrice Ledésert, Clotilde Maestri, Patrick Di Martino, Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
food.ingredient, Materials science, Agar plate, 03 medical and health sciences, chemistry.chemical_compound, food, Materials Chemistry, Agar, General Materials Science, Mycelium, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, Polyurethane, chemistry.chemical_classification, 0303 health sciences, biology, 030306 microbiology, Aspergillus niger, Polymer, [CHIM.MATE]Chemical Sciences/Material chemistry, Biodegradation, biology.organism_classification, [CHIM.POLY]Chemical Sciences/Polymers, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, chemistry, Chemical engineering, Mechanics of Materials, Penicillium
Abstract

Polyurethane-based polymers are widely used in modern materials and as Phase Change Materials (PCMs) to improve the energy efficiency of buildings. The fungal development in buildings is favoured by the degradation of polymeric materials that act as nutritional substrates. In the present study, the fungal biodegradation of a polyether-urethane PCM (PUX1520) was investigated. Two methods of biodegradation by fungal growth on agar and in liquid media were used. Fungal growth on agar plates was monitored by measuring the surface area of each mycelium over a period of 11 days. The degradation products of PUX1520 were analysed by FT-IR and MALDI-TOF. The PUX1520 polymer had no impact on the growth of Aspergillus niger, while the growth of Penicillium sp. was increased in the presence of PUX1520. MALDI-TOF analysis revealed the existence of different soluble forms of the polymer whose concentration decreased after exposure to the fungal strains. From FT-IR analysis on the residual polymer material, an oxidation process is proposed to describe the dissociation of the urethane functions.

Published
2021

4. First characterization of the cooling of the paleo-geothermal system of Terre-de-Haut (Les Saintes archipelago, Guadeloupe): Application of fluid inclusion and chlorite thermometry

Author

Franck Bourdelle, Béatrice Ledésert, Michel Dubois, Gildas Beauchamps, Ronan L. Hébert, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 (LGCgE), Université d'Artois (UA)-Université de Lille-Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Groupe d'Etude des Méthodes de l'Analyse Sociologique de la Sorbonne (GEMASS), Fondation Maison des sciences de l'homme (FMSH)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CY Cergy Paris Université (CY), Université Paris-Seine, and CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY)

Subjects
business.industry, Geothermal energy, Geochemistry, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Geothermal exploration, chemistry.chemical_compound, Geophysics, chemistry, Geochemistry and Petrology, Fluid inclusions, Inclusion (mineral), Vein (geology), business, Geothermal gradient, Quartz, Chlorite, ComputingMilieux_MISCELLANEOUS, Geology
Abstract

International audience; Due to its geodynamic location in the Lesser Antilles arc, Basse-Terre of Guadeloupe displays an active volcanism which is favourable to the development of high-enthalpy geothermal energy. An exhumed analogue of the Bouillante geothermal reservoir has been recently characterized in Terre-de-Haut island (Les Saintes archipelago), giving an opportunity to study the cooling of a natural geothermal system and the related alterations.By coupling chlorite geothermometry and primary fluid inclusions in associated zoned quartz crystals located in N70 trending fractures, new insights on the Terre-de-Haut paleo-geothermal evolution can be inferred by distinguishing three new different episodes during functioning and cooling of this system: (i) a temperature of at least 240–270 °C in fluid inclusions trapped in the quartz core, (ii) chlorite formation at about 120 °C, and (iii) temperatures of ~50 °C - or less - in fluid inclusions of the quartz outer growth zones. Fluid inclusions also reveal that the hydrothermal fluid is of low salinity (2 wt% NaCl), probably of meteoric and sea water origin. Additionally, a second type of fluid inclusions observed in a banded quartz vein indicates at least an episode of a CO2-(H2O) fluid, with traces of H2S. Hence, some similarities can be highlighted between Terre-de-Haut and the Bouillante active geothermal systems in term of the highest temperatures of circulation events and gas composition, despite a difference in fluid origin. This study shows that some alteration episodes also occur at low temperature during the cooling of the geothermal system. Moreover, the N70 trending fractures, that have been identified as drains for the hot temperature fluids, have to be considered for future geothermal exploration.

Published
2021

5. Tunable keto emission of 2-(2′-hydroxyphenyl)benzothiazole derivatives with π-expansion, substitution and additional proton transfer site for excited-state proton transfer-based fluorescent probes: Theoretical insights

Author

Fabrice Goubard, Nawee Kungwan, Komsun Chaihan, Thanh-Tuân Bui, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Proton, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, General Chemical Engineering, General Physics and Astronomy, General Chemistry, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 01 natural sciences, Fluorescence, Enol, 0104 chemical sciences, chemistry.chemical_compound, symbols.namesake, [CHIM.POLY]Chemical Sciences/Polymers, Benzothiazole, chemistry, Excited state, Intramolecular force, Stokes shift, symbols, Physical chemistry, Molecular orbital, ComputingMilieux_MISCELLANEOUS
Abstract

Electronic properties and excited-state intramolecular proton transfer (ESIPT) processes of 2-(2′-hydroxyphenyl)benzothiazole (HBT) and its derivatives with different chemical structures (π-expansion, benzothiazole substituent and additional PT unit) have been theoretically investigated. The red-shifts of enol absorption peaks are found for all HBT derivatives regardless of chemical structures, whereas the blue-shifts or red-shifts of keto emission peaks are dependent on the orientation of π-expansion and the additional PT unit compared to HBT, which are rationalized by frontier molecular orbitals. Among designed HBT derivatives, a HBT having two PT units connected with π-expansion along the nodal plane is the best candidate for fluorescent probes because of its keto emission at 1159 nm with the largest Stokes shift. Moreover, potential energy curves and dynamic simulations confirm that the emission at much longer wavelength is from the di-keto species driven by double PT process. Based on this theoretical investigation, the keto emission of HBT derivatives in NIR region can be achieved by the combination of π-expansion along the nodal plane and additional PT unit.

Published
2021

6. FTIR Spectroscopy for Identification and Intra-Species Characterization of Serpula lacrymans

Author

Faisl Bousta, Rony Barboux, Patrick Di Martino, Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Technology, QH301-705.5, QC1-999, Fungus, Serpula lacrymans, biodegradation, 03 medical and health sciences, 11. Sustainability, Botany, General Materials Science, Sample preparation, Biology (General), Fourier transform infrared spectroscopy, Malt extract agar, QD1-999, Instrumentation, Mycelium, ComputingMilieux_MISCELLANEOUS, [SDV.MP.MYC]Life Sciences [q-bio]/Microbiology and Parasitology/Mycology, 030304 developmental biology, Fluid Flow and Transfer Processes, 0303 health sciences, biology, 030306 microbiology, Chemistry, Physics, Process Chemistry and Technology, Microfiltration membrane, General Engineering, cultural heritage, Engineering (General). Civil engineering (General), biology.organism_classification, Computer Science Applications, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, FTIR, identification, TA1-2040, Dry rot, wood
Abstract

The dry rot fungus Serpula lacrymans is the most destructive fungal agent of wood building materials in Europe, Russia, North America, and Japan. The identification of this wood-deteriorating agent and the discrimination of different fungal isolates is very important for the control of buildings in general and for the preservation of cultural heritage in particular. The objective of the study was to develop a Fourier transform infrared (FTIR) method coupled with a partial least square discriminant analysis (PLS-DA) for the sample preparation and identification of S. lacrymans. Five distinct S. lacrymans strains were analysed and compared to two strains of unrelated fungal species. Different methods of mycelial growth, sample preparation, and FTIR spectral data normalisation were compared. FTIR analysis of a harvested mycelium grown on the surface of a polyether sulfone microfiltration membrane deposited on a malt extract agar medium, followed by vector normalization and PLS-DA statistical analysis, resulted in 100% correct attribution at phylum, species, and strain level, regardless of the type of standardization used. This study confirms the applicability of FTIR spectroscopy for the identification of S. lacrymans and the discrimination of different strains belonging to this species.

Published
2021

7. Piezoionic sensors based on formulated PEDOT:PSS and Aquivion ® for ionic polymer–polymer composites

Author

Antoine Adjaoud, Linda Chikh, Giao T. M. Nguyen, Marc-David Braida, Cédric Plesse, Sébastien Péralta, Lise Trouillet-Fonti, Nicolas Uguen, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Solvay Recherches & Innovation Centre de Lyon, Solvay (France), Laboratoire Polymères et Matériaux Avancés (LPMA), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CY Cergy Paris Université (CY), and Université Paris-Seine

Subjects
chemistry.chemical_classification, Materials science, Ionic bonding, 02 engineering and technology, Polymer, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, PEDOT:PSS, Mechanics of Materials, Signal Processing, Polymer composites, General Materials Science, Electrical and Electronic Engineering, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Civil and Structural Engineering
Abstract

International audience

Published
2021

8. Water-Induced Damage in Microporous Carbonate Rock by Low-Pressure Injection Test

Author

Davide Geremia, Fanny Descamps, Christian David, Sara Vandycke, Joel Sarout, Lionel Esteban, Beatriz Menéndez, Jeremie Dautriat, Christophe Barnes, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, and CY Cergy Paris Université (CY)

Subjects
Work (thermodynamics), Materials science, 010504 meteorology & atmospheric sciences, Injection tests, Mechanical tests, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Geology, Microporous material, Deformation (meteorology), 010502 geochemistry & geophysics, Geotechnical Engineering and Engineering Geology, Overburden pressure, 01 natural sciences, Piezoelectricity, Carbonate rocks, Coupling (piping), Carbonate rock, Geotechnical engineering, Differential stress, Chalk, [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology, Water-weakening, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Civil and Structural Engineering
Abstract

International audience; In the present work, we investigate the mechanical weakening and deformation induced by water on a microporous carbonate rock, the Obourg Chalk from Mons Basin (Belgium), through conventional triaxial tests and injection tests. The injection tests were conducted by waterflooding critically loaded rock samples, initially in dry condition, in a way to minimize the variations in the effective pressures. Furthermore, the samples were instrumented with P-wave piezoelectric transducers to provide active ultrasonic monitoring while injecting. The results show a significant reduction in the mechanical strength of this chalk. Analysis of the mechanical tests and the associated deformation allows us to describe the mechanical behavior as a function of the confining pressure, which draws a brittle-ductile transition spanning from low to high confining pressure. The injection tests, moreover, revealed that the amount of water injected before triggering mechanical instability decreases exponentially with respect to the applied differential stress on the rock sample. The data, therefore, suggest that the failure might be controlled by a mechanical coupling between the water-invaded zone and the dry one. Since water-weakening plays an important role in several fields like oil industry, through secondary and tertiary recovery of hydrocarbons, Enhanced Geothermal Systems (EGS), as well as in the mechanical stability of underground cavities, the outcome of this work is of primary importance in mitigating any kind of problems related to these operations.

Published
2021

9. The international Lexicon classroom project

Author

Mesiti, Carmel, Michèle, Artigue, Hollingsworth, Hilary, Cao, Yiming, Clarke, David, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), Artigue, Michèle, Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)

Subjects
[SHS] Humanities and Social Sciences, [MATH] Mathematics [math], [MATH]Mathematics [math], ComputingMilieux_MISCELLANEOUS, [SHS]Humanities and Social Sciences
Abstract

International audience

Published
2021

10. Teachers talking about their classrooms: Learning from the professional lexicons of mathematics teachers around the world

Author

David Clarke, Yiming Cao, Michèle Artigue, Hilary Hollingsworth, Carmel Mesiti, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), and Artigue, Michèle

Subjects
Czech, Vocabulary, media_common.quotation_subject, International community, [MATH] Mathematics [math], Lexicon, language.human_language, [SHS]Humanities and Social Sciences, Empirical research, Mathematics education, language, ComputingMilieux_COMPUTERSANDEDUCATION, [SHS] Humanities and Social Sciences, [MATH]Mathematics [math], Set (psychology), China, media_common
Abstract

Different communities, speaking different languages, employ different naming systems to describe the events, actions, and interactions of the mathematics classroom. The International Classroom Lexicon Project documented the professional vocabulary available to middle-school mathematics teachers in Australia, Chile, China, the Czech Republic, Finland, France, Germany, Japan, Korea, and the United States. National teams of researchers and experienced teachers used a common set of classroom videos to stimulate recognition of familiar terms describing aspects of the mathematics classroom. This book details the existing professional vocabulary in each international community by which mathematics teachers conceptualise their practice, and explores the characteristics, structures, and distinctive features of each national lexicon. This book has the potential to enrich the professional vocabulary of mathematics teachers around the world by providing access to sophisticated classroom practices named by teachers in different countries. This one volume offers separate, individual lexicons developed from empirical research, the capacity to juxtapose such lexicons, and an unmatched opportunity to highlight the cultural, historical, and linguistic bases of teachers' professional language.

Published
2021

11. Les Mathématiques du Système Solaire en plein air. Le planétaire humain au collège

Author

Maha Abboud, Emmanuel Rollinde, Université de Cergy Pontoise (UCP), Université Paris-Seine, Laboratoire de Didactique André Revuz (LDAR (URP_4434)), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Lille-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris Cité (UPCité)-CY Cergy Paris Université (CY), Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Réseau des Lieux d'éducation associés à l'IFE-ENS de Lyon (LéA IFE), École normale supérieure de Lyon (ENS de Lyon), Rollinde, Emmanuel, Normandie Université (NU)-Normandie Université (NU)-Université de Lille-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Paris (UP)-CY Cergy Paris Université (CY), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), and École normale supérieure - Lyon (ENS Lyon)

Subjects
[PHYS.PHYS.PHYS-ED-PH] Physics [physics]/Physics [physics]/Physics Education [physics.ed-ph], [MATH] Mathematics [math], [MATH]Mathematics [math], ComputingMilieux_MISCELLANEOUS, [PHYS.PHYS.PHYS-ED-PH]Physics [physics]/Physics [physics]/Physics Education [physics.ed-ph]
Abstract

International audience

Published
2021

12. Electromechanical Model of a Conducting Polymer Transducer, Application to a Soft Gripper

Author

Chia-Ju Peng, Olivier Ameline, Frederic Braz Ribeiro, Cedric Plesse, Sinan Haliyo, Shih-Jui Chen, Luc Chassagne, Barthelemy Cagneau, Laboratoire d'Ingénierie des Systèmes de Versailles (LISV), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), National Central University [Taiwan] (NCU), Institut des Systèmes Intelligents et de Robotique (ISIR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Interactions Multi-échelles, Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and National Central University

Subjects
Soft robotics, chemical sensors, lcsh:Electrical engineering. Electronics. Nuclear engineering, lcsh:TK1-9971, end effectors, [SPI.AUTO]Engineering Sciences [physics]/Automatic
Abstract

International audience; Conducting interpenetrating polymer networks (C-IPN) are a promising solution for the design of sensing and actuating parts at macro-or microscale. This class of polymers can be used in open-air, allowing for large displacements under low voltages with a reversible process. In this work, we are mainly interested in the electromechanical characterization of the material because of its particular behavior. Two working modes, namely actuation and sensing, are identified through modeling and experimental validations. The relationship between the output forces, the tip displacements and the driving voltages was highlighted with an experimental setup while actuating. On the other hand, the linear range and the sensitivity have been empirically modeled in sensing mode. We also demonstrate that this material is suitable to build a gripper for small objects. A sphere was lifted by the gripper, and the grasping force was successfully monitored by the sensing finger. This is a promising first step towards more complex 3D structures.

Published
2019

13. Implementation Studies in Mathematics Education: What Theoretical Resources?

Author

Michèle, Artigue, Artigue, Michèle, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), and Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)

Subjects
4. Education, Research methodology, Mathematics education, ComputingMilieux_COMPUTERSANDEDUCATION, Sociology, [MATH]Mathematics [math], [SHS]Humanities and Social Sciences
Abstract

This article is devoted to the theoretical resources likely to support implementation studies. After the introductory section, we focus on the potential offered by resources internal to the field of mathematics education, especially those offered by design-based research, by the systemic and ecological perspective underlying the anthropological theory of the didactic, and by the documentational approach to didactics regarding the teachers’ relationship with educational resources. We then examine particular examples of implementation studies, paying specific attention to the way they combine internal and external resources. For that purpose we consider on the one hand, European projects aiming at the large-scale implementation of inquiry-based learning and teaching in STEM education, especially the PRIMAS project, and on the other hand, the contributions to the thematic working group devoted to implementation and replication studies at CERME 10 and CERME 11. We conclude with more general reflections.

Published
2021

14. Asymmetric PEDOT:PSS Trilayers as Actuating and Sensing Linear Artificial Muscles

Author

Frédéric Vidal, John D. W. Madden, Giao T. M. Nguyen, Saeedeh Ebrahimi-Takalloo, Kätlin Rohtlaid, Cédric Plesse, Tan Ngoc Nguyen, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, University of British Columbia (UBC), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), CY Cergy Paris Université (CY), and Université Paris-Seine

Subjects
Materials science, business.industry, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Industrial and Manufacturing Engineering, 0104 chemical sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [CHIM.POLY]Chemical Sciences/Polymers, PEDOT:PSS, Mechanics of Materials, Optoelectronics, General Materials Science, Artificial muscle, 0210 nano-technology, business, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2021

15. Electro-interpenetration as tool for high strain trilayer conducting polymer actuator

Author

Giao T. M. Nguyen, Frédéric Vidal, Adelyne Fannir, Cédric Plesse, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), CY Cergy Paris Université (CY), and Université Paris-Seine

Subjects
Conductive polymer, Materials science, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, High strain, [CHIM.POLY]Chemical Sciences/Polymers, Mechanics of Materials, Signal Processing, General Materials Science, Electrical and Electronic Engineering, Composite material, 0210 nano-technology, Actuator, ComputingMilieux_MISCELLANEOUS, Civil and Structural Engineering
Abstract

Electrochemical actuators based on electronic conducting polymers can convert electrical energy into mechanical work. The amplitude of the electromechanical response is related on volumetric charge density of conducting polymer electrodes and strain-to-charge ratio, an empiric electromechanical coupling parameter. In this work we describe the elaboration of high performance trilayer bending actuators by the electro-interpenetration of a conducting polymer, i.e. poly(3,4-ethylenedioxythiophene) (PEDOT), within a host membrane. The host membrane is first elaborated as an interpenetrating polymer networks combining nitrile butadiene rubber network and poly(ethylene oxide) network. An oxidative chemical prepolymerization of EDOT allows turning the host membrane into conductive substrate suitable for subsequent electropolymerization. The electropolymerization of EDOT from the chemically polymerized layer allows controlled interpenetration of PEDOT underneath the surface. A significant increase of local concentration of PEDOT in the electrodes, compared to those obtained from oxidative polymerization lead to a significant increase of the charge density. The polymerization conditions do not have significant impact on sign and absolute value of strain-to-charge ratio, but it can be improved by the nature of the electrolyte. The combination of these two effects leads to an actuator with up to 15% of strain difference.

Published
2021

16. Identifying the professional lexicon of middle school mathematics teachers: The French case

Author

Michèle, Artigue, Grugeon-Allys, Brigitte, Horoks, Julie, Pilet, Julia, Artigue, Michèle, Routlelge, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA)

Subjects
[SHS] Humanities and Social Sciences, [MATH] Mathematics [math], [MATH]Mathematics [math], ComputingMilieux_MISCELLANEOUS, [SHS]Humanities and Social Sciences
Abstract

International audience

Published
2021

17. Experimental research on salt contamination procedures and methods for assessment of the salt distribution

Author

Zuzana Slížková, Davide Gulotta, Sebastiaan Godts, Beatriz Menéndez, Magdalini Theodoridou, Ioannis Ioannou, Noushine Shahidzadeh, Cristiana Nunes, Barbara Lubelli, Asel Maria Aguilar Sanchez, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Soft Matter (WZI, IoP, FNWI), and IoP (FNWI)

Subjects
Salt crystallisation test, Materials science, Capillary action, Sodium, Salt distribution, 0211 other engineering and technologies, Salt (chemistry), chemistry.chemical_element, 020101 civil engineering, 02 engineering and technology, 0201 civil engineering, law.invention, law, Phase (matter), 021105 building & construction, Porous materials, Salt accumulation, General Materials Science, Crystallization, Porosity, [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology, Water content, ComputingMilieux_MISCELLANEOUS, Civil and Structural Engineering, chemistry.chemical_classification, Building and Construction, 6. Clean water, chemistry, Chemical engineering, Earth and Environmental Sciences, Absorption (chemistry)
Abstract

The RILEM TC ASC-271 is developing a new laboratory test to assess the durability of porous building materials to salt crystallisation. The test encompasses two phases: salt accumulation and damage propagation. This paper focuses on designing a procedure for the accumulation phase; this is considered successful when salts crystallise at the material's evaporative surface (common situation observed on site) without the occurrence of damage. Two procedures were developed and tested on two limestones with different porosity: (1) capillary absorption of a salt solution followed by drying, and (2) continuous capillary absorption. Sodium chloride or sodium sulphate solutions were used. Several methods for assessing the salt distribution were employed: ultrasonic pulse velocity, drilling/scratching resistance, hygroscopic moisture content, ion chromatography, scanning electron microscopy, and micro X-ray fluorescence. The results enabled the selection of the most effective protocol for the salt accumulation phase. ISSN:0950-0618

Published
2021

18. Towards a large-scale integration of renewable energies in Morocco

Author

S. Smouh, M. Zazi, Tarik Kousksou, B.E. Lebrouhi, M. Boulakhbar, Abdelmajid Jamil, Mohamed Maaroufi, Ecole Normale Supérieure de l'Enseignement Technique [Rabat] (ENSET), Université Mohammed V, Systèmes d'Information et d'Analyse Multi-Echelles (SIAME), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), Ecole Supérieure de Technologie de Fès (EST), and Université Sidi Mohamed Ben Abdellah (USMBA)

Subjects
WWTP, Waste Water Treatment Plan, Energy storage, RES, Renewable energy sources, V2G, Vehicle to Grid, MASEN, Moroccan Agency for Solar Energy, 02 engineering and technology, IPPs, Independent Power Producer's Electricity, 7. Clean energy, Thermal energy storage, Energy policy, GHGE, Green House Gas Emissions, [SPI]Engineering Sciences [physics], Hydroelectricity, Concentrated solar power, 0202 electrical engineering, electronic engineering, information engineering, RETs, Renewable energy technologies, TVC, Thermo-Vapor compression, SG, Smart Grid, BWRO, Brackish Water Reverse Osmose, MSF, Multi-Stage Flash, Energy mix, ED, Electro Dialyses, 021001 nanoscience & nanotechnology, Renewable energy, PV, Photovoltaic, RO, Reverse Osmose, Morocco, R&D, Research and Development, MED, Multi-Effect Distillation, CCGTs, Combined Cycle Gas Turbines, SET Roadmap, Roadmap for Sustainable Electricity Trade, 0210 nano-technology, PtH, Power-to-Hydrogen, SWRO, Sea Water Reverse Osmose, PtX, Power to X, 020209 energy, TOE, Tonne Oil Energy, Energy Engineering and Power Technology, Power to X, CSP, Concentrated Solar Power, Context (language use), Article, EU, European Union, Green growth, RE, Renewable Energy, Electrical and Electronic Engineering, IRESEN, Institute of Research on solar energy and New Energies, Renewable Energy, Sustainability and the Environment, business.industry, ONEE, National Agency for Electricity and Water, PETS, Pumped Energy Transfer Station, Environmental economics, SDGs, Sustainable Development Goals, Renewable energy integration, 13. Climate action, LNG, Liquefied natural gas, Business, MVC, Mechanical Vapor compression
Abstract

Highlights • Towards a large-Scale Integration of Renewable Energies in Morocco. • Current status of major RE projects in Morocco. • Key elements for successful transformation of the power system., Renewable energies are a sustainable, unlimited and decarbonised solution to address future energy challenges. In this context, Morocco has a considerable advantage to position itself on this promising market. Furthermore, renewable energies have been highlighted as a key strategic source for the country's green growth. Morocco has adopted the renewable energy path through a strategy targeted on the development of solar, wind and hydroelectric power to boost its energy policy by adapting it to the challenges posed by today's world. Nowadays, Morocco is facing a challenge to reach 52% by 2030 of its total renewable energy capacity, which will exceed 42% by the end of 2020. The main objective of this paper is to study a scenario for 2030 for the Moroccan electricity system and to identify the challenges that need to be addressed in order to accelerate the integration of renewable energies in the Moroccan energy mix and to achieve a possible export of such green energy towards Europe.

Published
2020

19. A statistical analysis of dust polarization properties in ALMA observations of Class 0 protostellar cores

Author

Vincent Guillet, V. J. M. Le Gouellec, Charles L. H. Hull, R. Mignon-Risse, Valeska Valdivia, Anaëlle Maury, F. Louvet, Patrick Hennebelle, M. González, A. Verliat, Josep M. Girart, European Southern Observatory (ESO), Institut d'astrophysique spatiale (IAS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Ciencies de l'Espai [Barcelona] (ICE-CSIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Institut d'Estudis Espacials de Catalunya (IEEC-CSIC), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris-Saclay, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Storengy France, European Southern Observatory, Ministerio de Ciencia, Innovación y Universidades (España), Japan Society for the Promotion of Science, National Astronomical Observatory of Japan, European Commission, Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, symbols.namesake, Paramagnetism, Polarization, protostars [Stars], 0103 physical sciences, Radiative transfer, Protostar, Astrophysics::Solar and Stellar Astrophysics, Planck, 010303 astronomy & astrophysics, formation [Stars], Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Earth and Planetary Astrophysics (astro-ph.EP), Physics, polarization, stars: formation, stars: protostars, jets and outflows [ISM], 010308 nuclear & particles physics, magnetic fields [ISM], stars: magnetic field, Estimator, Astronomy and Astrophysics, Polarization (waves), Astrophysics - Astrophysics of Galaxies, Interstellar medium, magnetic field [Stars], ISM: jets and outflows, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), symbols, Astrophysics::Earth and Planetary Astrophysics, ISM: magnetic fields, Magnetohydrodynamics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Earth and Planetary Astrophysics
Abstract

Context. Recent observational progress has challenged the dust grain-alignment theories used to explain the polarized dust emission routinely observed in star-forming cores. Aims. In an effort to improve our understanding of the dust grain alignment mechanism(s), we have gathered a dozen ALMA maps of (sub)millimeter-wavelength polarized dust emission from Class 0 protostars and carried out a comprehensive statistical analysis of dust polarization quantities. Methods. We analyze the statistical properties of the polarization fraction Pfrac and the dispersion of polarization position angles S. More specifically, we investigate the relationship between S and Pfrac as well as the evolution of the product S × Pfrac as a function of the column density of the gas in the protostellar envelopes. We compare the observed trends with those found in polarization observations of dust in the interstellar medium and in synthetic observations of non-ideal magneto-hydrodynamic (MHD) simulations of protostellar cores. Results. We find a significant S Pfrac-0.79 correlation in the polarized dust emission from protostellar envelopes seen with ALMA; the power-law index significantly differs from the one observed by Planck in star-forming clouds. The product S × Pfrac, which is sensitive to the dust grain alignment efficiency, is approximately constant across three orders of magnitude in envelope column density (from NH2 = 1022 cm-2 to NH2 = 1025 cm-2), with a mean value of 0.36-0.17+0.10. This suggests that the grain alignment mechanism producing the bulk of the polarized dust emission in star-forming cores may not systematically depend on the local conditions such as the local gas density. However, in the lowest-luminosity sources in our sample, we find a hint of less efficient dust grain alignment with increasing column density. Our observations and their comparison with synthetic observations of MHD models suggest that the total intensity versus the polarized dust are distributed at different intrinsic spatial scales, which can affect the statistics from the ALMA observations, for example, by producing artificially high Pfrac. Finally, synthetic observations of MHD models implementing radiative alignment torques (RATs) show that the statistical estimator S × Pfrac is sensitive to the strength of the radiation field in the core. Moreover, we find that the simulations with a uniform perfect alignment (PA) of dust grains yield, on average, much higher S × Pfrac values than those implementing RATs; the ALMA values lie among those predicted by PA, and they are significantly higher than the ones obtained with RATs, especially at large column densities. Conclusions. Ultimately, our results suggest that dust alignment mechanism(s) are efficient at producing dust polarized emission in the various local conditions typical of Class 0 protostars. The grain alignment efficiency found in these objects seems to be higher than the efficiency produced by the standard RAT alignment of paramagnetic grains. Further studies will be needed to understand how more efficient grain alignment via, for example, different irradiation conditions, dust grain characteristics, or additional grain alignment mechanisms can reproduce the observations., V.J.M.L.G. acknowledges the support of the ESO Studentship Program. A.J.M. acknowledges support from the Joint ALMA Observatory Visitor Program, and ESO Visitor program. J.M.G. is supported by the Spanish grant AYA2017-84390-C2-R (AEI/FEDER, UE). C.L.H.H. acknowledges the support of both the NAOJ Fellowship as well as JSPS KAKENHI grants 18K13586 and 20K14527. This work has benefited from the support of the European Research Council under the Horizon 2020 Framework Programme (Starting Grant MagneticYSOs with grant agreement no. 679937)

Published
2020

20. Exploiting NIKA2/XMM-Newton imaging synergy for intermediate-mass high-z galaxy clusters within the NIKA2 SZ large program: Observations of ACT-CL J0215.4+0030 at z ∼ 0.9

Author

J.-F. Lestrade, C. Kramer, Bilal Ladjelate, L. Perotto, G. Lagache, S. Leclercq, K. F. Schuster, Albrecht Sievers, F. Mayet, Aurélien Benoit, Martino Calvo, Alessandro Monfardini, I. Bartalucci, Florian Ruppin, O. Bourrion, Giampaolo Pisano, V. Revéret, R. Adam, A. Beelen, M. Arnaud, G. W. Pratt, Shibo Shu, Pascale Andre, A. Andrianasolo, J. Goupy, P. A. R. Ade, Alicia Gomez, F.-X. Désert, N. Ponthieu, Florian Kéruzoré, A. Ritacco, C. Romero, Etienne Pointecouteau, J. F. Macías-Pérez, H. Aussel, Carole Tucker, S. Berta, P. D. Mauskopf, A. Catalano, H. Roussel, Simon Doyle, E. F. C. Driessen, M. De Petris, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Université Paris-Saclay, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Cardiff University, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Hélium : du fondamental aux applications (NEEL - HELFA), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Max Planck Institute for Extraterrestrial Physics (MPE), Max-Planck-Gesellschaft, Cryogénie (NEEL - Cryo), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de RadioAstronomía Milimétrica (IRAM), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), University of Pennsylvania, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Massachusetts Institute of Technology (MIT), NASA Goddard Space Flight Center (GSFC), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), LVMH Recherche Parfums et Cosmétiques, Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (HELFA), Cryogénie (Cryo), Bordeaux Sciences Agro [Gradignan], Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
Cosmology: observations, Galaxies: clusters: individual: ACT-CL J0215.4+0030, Galaxies: clusters: intracluster medium, Techniques: high angular resolution, Physics, galaxies: clusters: individual: ACT-CL J0215.4+0030, galaxies: clusters: intracluster medium, 010308 nuclear & particles physics, techniques: high angular resolution, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxy, Redshift, law.invention, Space and Planetary Science, Angular diameter, law, Intracluster medium, cosmology: observations, 0103 physical sciences, Cluster (physics), Cluster sampling, Hydrostatic equilibrium, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Galaxy cluster
Abstract

High-resolution mapping of the intracluster medium (ICM) up to high redshift and down to low masses is crucial to derive accurate mass estimates of the galaxy cluster and to understand the systematic eects aecting cosmological studies based on galaxy clusters. We present a spatially resolved Sunyaev-Zel'dovich (SZ)/X-ray analysis of ACT-CL J0215.4+0030, a high-redshift (z = 0:865) galaxy cluster of intermediate mass (M500 ' 3:5 1014 M) observed as part of the ongoing NIKA2 SZ large program, which is a follow-up of a representative sample of objects at 0:5 z 0:9. In addition to the faintness and small angular size induced by its mass and redshift, the cluster is contaminated by point sources that significantly aect the SZ signal. This is therefore an interesting case study for the most challenging sources of the NIKA2 cluster sample. We present the NIKA2 observations of this cluster and the resulting data.We identified the point sources that aect the NIKA2 maps of the cluster as submillimeter galaxies with counterparts in catalogs of sources constructed by the SPIRE instrument on board the Herschel observatory. We reconstructed the ICM pressure profile by performing a joint analysis of the SZ signal and of the point-source component in the NIKA2 150 GHz map. This cluster is a very weak source that lies below the selection limit of the Planck catalog. Nonetheless, we obtained high-quality estimates of the ICM thermodynamical properties with NIKA2. We compared the pressure profile extracted from the NIKA2 map to the pressure profile obtained from X-ray data alone by deprojecting the public XMM-Newton observations of the cluster.We combined the NIKA2 pressure profile with the X-ray deprojected density to extract detailed information on the ICM. The radial distribution of its thermodynamic properties (the pressure, temperature and entropy) indicate that the cluster has a highly disturbed core. We also computed the hydrostatic mass of the cluster, which is compatible with estimations from SZ and X-ray scaling relations. We conclude that the NIKA2 SZ large program can deliver quality information on the thermodynamics of the ICM even for one of its faintest clusters after a careful treatment of the contamination by point sources., With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)

Published
2020

21. Conservation of plasticized PVC artifacts in museums: Influence of wrapping materials

Author

Emilande Apchain, Adeline Royaux, Isabelle Fabre-Francke, Gilles Barabant, Bertrand Lavédrine, Nathalie Balcar, Clémentine Bollard, Sophie Cantin, Odile Fichet, CY Cergy Paris Université (CY), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Centre de recherche et de restauration des musées de France (C2RMF), Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture et de la Communication (MCC), Centre de Recherche sur la Conservation (CRC ), Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), and Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture et de la Communication (MCC)

Subjects
Archeology, Materials science, Materials Science (miscellaneous), 010401 analytical chemistry, Plasticizer, 02 engineering and technology, Conservation, 021001 nanoscience & nanotechnology, 01 natural sciences, Artificial aging, [SHS]Humanities and Social Sciences, 0104 chemical sciences, Low-density polyethylene, SILK, Chemistry (miscellaneous), Color changes, [CHIM]Chemical Sciences, Relative humidity, Composite material, 0210 nano-technology, General Economics, Econometrics and Finance, Spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract

The effects of LDPE and PET in contact with heritage object made in PVC were studied and compared with silk paper during an artificial aging consisting in a temperature cycle and under controlled relative humidity. Color changes, morphological changes of the surface, plasticizers loss and surfaces properties were assessed over aging time. More pronounced color changes than for the references (without contact material and with silk paper) are observed for both contact materials but are more significant for PET whose surface has brown spots from three months of aging. The plasticizers cross LDPE from the outset of the aging but zein (protein additive) is evidenced only on the side in contact with the PVC. The PVC sample in contact with PET shows phtalic acid from DOP degradation but it remains on the PVC surface.

Published
2020

22. Experimental design approach for the synthesis of 3D-CoFe2O4 nanoflowers thin films by low-cost process

Author

N. Hosni, K. Zehani, K. Djebali, Frederic Mazaleyrat, H. Maghraoui-Meherzi, Lotfi Bessais, Institut de Chimie et des Matériaux Paris-Est (ICMPE), Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Université de Tunis El Manar (UTM), Centre de Biotechnologie de Borj Cédria (Hammam-Lif, Tunisie), Matériaux Magnétiques pour l'Energie (SATIE-MME), Composants et Systèmes pour l'Energie Electrique (CSEE), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), Composants et Systèmes pour l'Energie Electrique (SATIE-CSEE), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), and HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Horizontal scan rate, [PHYS]Physics [physics], Materials science, Annealing (metallurgy), [SDV]Life Sciences [q-bio], 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Capacitance, 0104 chemical sciences, Magnetization, Ferrimagnetism, [SDE]Environmental Sciences, Doehlert matrix, [CHIM]Chemical Sciences, General Materials Science, Thin film, Composite material, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Chemical bath deposition
Abstract

Three-dimensional CoFe2O4 nanoflowers thin films have been deposited on stainless steel by low-cost chemical bath deposition process. The experimental design methodology has been applied to investigate the effect of the principal experimental parameters on the saturation magnetization. The Rechtschaffner design demonstrates that annealing temperature, deposition time and reactional medium temperature are the most influential parameters. Doehlert matrix has been used to predict the optimal condition of the saturation magnetization. XRD data confirm the formation of the desired CoFe2O4 phase. SEM analysis reveals the formation of three-dimensional nanoflowers like-morphology. The CV curve of 3D-CoFe2O4 nanoflowers thin film deviate from the perfect rectangular shape, demonstrate this pseudocapacitive characteristics. The specific capacitance was found to be 472 F g−1 at 5 mA s−1 scan rate. The VSM measurement demonstrate that the film exhibits a ferrimagnetic behavior, with easy magnetization axis along the plane of the films. The 3D-CoFe2O4 elaborated at the optimal conditions shows a maximum saturation magnetization of 0.44 T.

Published
2020

23. From an analysis of content to an analysis of ordinary lecturing practices: A case-study in mathematical analysis

Author

Chorlay, Renaud, Mesnil, Zoé, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Université de Carthage, Université de Montpellier, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), and Sciencesconf.org, CCSD

Subjects
teaching and learning of analysis and calculus, Teachers' and students' practices at university level, [SHS.EDU]Humanities and Social Sciences/Education, [SHS.EDU] Humanities and Social Sciences/Education
Abstract

International audience; This paper bears on teaching practices in lecture courses on analysis in the first year of tertiary education. This case-study shows how the knowledge accumulated by the didactical community on the challenges in the teaching of a specific notion – the formal definition of limits of sequences – allows for a fine-grained analysis of teachers' practices. On the basis of this knowledge, three lecture courses were analysed and compared. Post-teaching interviews were used to test our hypotheses as to the didactical knowledge, choices and repertoires of the lecturers. This progress reports aims to sketch the research rationale and to discuss a small sample of results.

Published
2020

24. Planck 2018 results

Author

Planck Collaboration, Akrami, Y., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., Basak, S., Benabed, K., Kiiveri, K., Kim, J., Krachmalnicoff, N., Kunz, M., Kurki-Suonio, H., Lamarre, J. -M., Lasenby, A., Le Jeune, M., Levrier, F., Liguori, M., PAOLETTI, DANIELA, Lilje, P. B., Lindholm, V., López-Caniego, M., Lubin, P. M., Ma, Y. -Z., Macías-Pérez, J. F., Maggio, G., Maino, D., Mandolesi, N., Mangilli, A., Pettorino, V., Martin, P. G., Martínez-González, E., Matarrese, S., McEwen, J. D., Meinhold, P. R., Melchiorri, A., Migliaccio, M., Miville-Deschênes, M. -A., Molinari, D., Moneti, A., Piacentini, F., Montier, L., Morgante, G., Natoli, P., Pagano, L., Polenta, G., Puget, J. -L., Rachen, J. P., Reinecke, M., Remazeilles, M., Renzi, A., Rocha, G., Bernard, J. -P., Rosset, C., Roudier, G., Rubiño-Martín, J. A., Ruiz-Granados, B., Salvati, L., Sandri, M., Savelainen, M., Scott, D., Soler, J. D., Spencer, L. D., Bersanelli, M., Tauber, J. A., Tavagnacco, D., Toffolatti, L., Tomasi, M., Trombetti, T., Valiviita, J., Vansyngel, F., Van Tent, B., Vielva, P., VILLA, FABRIZIO, Bielewicz, P., Vittorio, N., Wehus, I. K., ZACCHEI, Andrea, Zonca, A., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bracco, A., Bucher, M., BURIGANA, CARLO, Calabrese, E., Cardoso, J. -F., Carron, J., Chiang, H. C., Combet, C., Crill, B. P., de Bernardis, P., de Zotti, G., Delabrouille, J., Delouis, J. -M., Di Valentino, E., Dickinson, C., Diego, J. M., Ducout, A., Dupac, X., Efstathiou, G., Elsner, F., Enßlin, T. A., Falgarone, E., Fantaye, Y., Ferrière, K., Finelli, F., Forastieri, F., Frailis, M., Fraisse, A. A., FRANCESCHI, ENRICO, Frolov, A., GALEOTTA, Samuele, Galli, S., Ganga, K., Génova-Santos, R. T., Ghosh, T., González-Nuevo, J., Górski, K. M., GRUPPUSO, ALESSANDRO, Gudmundsson, J. E., Guillet, V., Handley, W., Hansen, F. K., Herranz, D., Huang, Z., Jaffe, A. H., Jones, W. C., Keihänen, E., Keskitalo, R., Astrophysique, Laboratoire de physique de l'ENS - ENS Paris (LPENS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Parma = Università degli studi di Parma [Parme, Italie], Canadian Institute for Theoretical Astrophysics (CITA), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Patrimoine, Littérature, Histoire (PLH), Université Toulouse - Jean Jaurès (UT2J), Laboratoire de Recherche en Informatique (LRI), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CentraleSupélec, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Universidade Aberta [Lisboa], Centre National d'Études Spatiales [Toulouse] (CNES), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Dipartimento di Fisica [Roma La Sapienza], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (AOSS), University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Dipartimento di Fisica 'G. Galilei', Universita degli Studi di Padova, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), University of Manchester [Manchester], Venetian Institute Molecular Medicine (VIMM), University of British Columbia (UBC), CHU Tenon [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Laboratoire de neurobiologie cellulaire et moléculaire (NBCM), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Planck Collaboration, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Planck, Department of Physics, Helsinki Institute of Physics, Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Università degli studi di Parma = University of Parma (UNIPR), Université de Toulouse (UT)-Université de Toulouse (UT), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Università degli Studi di Padova = University of Padua (Unipd), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), ANR-17-CE31-0022,BxB,Champs B interstellaires et modes B de l'inflation(2017), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Observatoire de Paris, Université Paris-Seine-Université Paris-Seine-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2020-....] (UGA [2020-....])-Institut polytechnique de Grenoble - Grenoble Institute of Technology [2020-....] (Grenoble INP [2020-....]), Université Grenoble Alpes [2020-....] (UGA [2020-....]), Ministerio de Economía y Competitividad (España), Consejo Superior de Investigaciones Científicas (España), European Commission, European Research Council, European Space Agency, Laboratoire de physique de l'ENS - ENS Paris (LPENS (UMR_8023)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)

Subjects
Astronomy, HELICITY, Cosmic microwave background, Astrophysics, cosmic background radiation, magnetic fields, 7. Clean energy, 01 natural sciences, Cosmic background radiation, Dust, Extinction, ISM: magnetic fields, ISM: structure, Polarization, Submillimeter: diffuse background, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, media_common, Physics, Spectral index, Astrophysics of Galaxies, extinction, Astrophysics::Instrumentation and Methods for Astrophysics, POWER SPECTRA, Cosmic background radiation, Dust, Extinction, ISM: magnetic fields, ISM: structure, Polarization, Submillimeter: diffuse background, Polarization (waves), CMB cold spot, astro-ph.CO, symbols, Instrumentation and Methods for Astrophysics, submillimeter: ISM, dust, Astrophysics - Instrumentation and Methods for Astrophysics, local insterstellar matter, INTERSTELLAR DUST, Astrophysics - Cosmology and Nongalactic Astrophysics, COMPONENT SEPARATION, Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.GA, media_common.quotation_subject, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, INFLATIONARY UNIVERSE, MICROWAVE EMISSION, MAGNETIC-FIELDS, NO, symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Black-body radiation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Planck, Reionization, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, polarization, 010308 nuclear & particles physics, turbulence, Astronomy and Astrophysics, 115 Astronomy, Space science, Astrophysics - Astrophysics of Galaxies, 13. Climate action, Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), PROBE WMAP OBSERVATIONS, STATISTICAL PROPERTIES, RADIATION, submillimeter: diffuse background, Cosmology and Nongalactic Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], astro-ph.IM
Abstract

Planck Collaboration: et al., arXiv:1801.04945v3, The study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (CMB) polarization in the quest for the curl-like B-mode polarization from primordial gravitational waves and the low-multipole E-mode polarization associated with the reionization of the Universe. We used the new Planck PR3 maps to characterize Galactic dust emission at high latitudes as a foreground to the CMB polarization and use end-to-end simulations to compute uncertainties and assess the statistical significance of our measurements. We present Planck EE, BB, and TE power spectra of dust polarization at 353 GHz for a set of six nested high-Galactic-latitude sky regions covering from 24 to 71% of the sky. We present power-law fits to the angular power spectra, yielding evidence for statistically significant variations of the exponents over sky regions and a difference between the values for the EE and BB spectra, which for the largest sky region are αEE = −2.42 ± 0.02 and αBB = −2.54 ± 0.02, respectively. The spectra show that the TE correlation and E/B power asymmetry discovered by Planck extend to low multipoles that were not included in earlier Planck polarization papers due to residual data systematics. We also report evidence for a positive TB dust signal. Combining data from Planck and WMAP, we have determined the amplitudes and spectral energy distributions (SEDs) of polarized foregrounds, including the correlation between dust and synchrotron polarized emission, for the six sky regions as a function of multipole. This quantifies the challenge of the component-separation procedure that is required for measuring the low-ℓ reionization CMB E-mode signal and detecting the reionization and recombination peaks of primordial CMB B modes. The SED of polarized dust emission is fit well by a single-temperature modified black-body emission law from 353 GHz to below 70 GHz. For a dust temperature of 19.6 K, the mean dust spectral index for dust polarization is βdP = 1.53±0.02. The difference between indices for polarization and total intensity is βdP−βdI = 0.05±0.03. By fitting multi-frequency cross-spectra between Planck data at 100, 143, 217, and 353 GHz, we examine the correlation of the dust polarization maps across frequency. We find no evidence for a loss of correlation and provide lower limits to the correlation ratio that are tighter than values we derive from the correlation of the 217- and 353 GHz maps alone. If the Planck limit on decorrelation for the largest sky region applies to the smaller sky regions observed by sub-orbital experiments, then frequency decorrelation of dust polarization might not be a problem for CMB experiments aiming at a primordial B-mode detection limit on the tensor-to-scalar ratio r ≃ 0.01 at the recombination peak. However, the Planck sensitivity precludes identifying how difficult the component-separation problem will be for more ambitious experiments targeting lower limits on r., The Planck Collaboration acknowledges the support of: ESA; CNES, and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA, and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); ERC and PRACE (EU)

Published
2020

25. Planck 2018 results

Author

Jean-François Cardoso, A. A. Fraisse, P. Vielva, A. J. Banday, Charles R. Lawrence, Yabebal Fantaye, Alessandro Gruppuso, Krzysztof M. Gorski, J.-L. Puget, B. D. Wandelt, Guilaine Lagache, A. Mangilli, M. López-Caniego, P. de Bernardis, R. B. Barreiro, M.-A. Miville-Deschênes, Matthieu Tristram, K. Kiiveri, M. Frailis, Carlo Baccigalupi, François Levrier, E. Hivon, S. Galli, J. Aumont, François R. Bouchet, A. Renzi, Reijo Keskitalo, Michele Liguori, Sabino Matarrese, Diego Molinari, M. Ashdown, A. Mennella, Nabila Aghanim, F. K. Hansen, A. Ducout, E. Martínez-González, J.-M. Lamarre, B. Partridge, Gianluca Morgante, Yashar Akrami, Anthony Challinor, H. K. Eriksen, L. P. L. Colombo, L. Pagano, L. Patrizii, Marian Douspis, J.-M. Delouis, O. Perdereau, Alessandro Melchiorri, X. Dupac, N. Mandolesi, Andrew H. Jaffe, Hannu Kurki-Suonio, J. A. Tauber, M. Savelainen, M. Tomasi, Mario Ballardini, George Efstathiou, Nicola Bartolo, Andrea Zonca, H. C. Chiang, N. Mauri, O. Doré, L. Vibert, Theodore Kisner, Steven Gratton, Marco Bersanelli, Andrei V. Frolov, L. Salvati, Erminia Calabrese, A. Moneti, L. Montier, J. B. Kim, A.-S. Suur-Uski, Martina Gerbino, G. Sirri, Tuhin Ghosh, J. F. Macías-Pérez, F. Boulanger, P. B. Lilje, J. Valiviita, G. Patanchon, Adam Moss, Ricardo Genova-Santos, M. Migliaccio, Graca Rocha, Zhiqi Huang, C. Combet, E. Falgarone, Valeria Pettorino, Ingunn Kathrine Wehus, M. Bucher, Douglas Scott, D. Tavagnacco, M. Sandri, Jacques Delabrouille, S. Mottet, G. Roudier, J. González-Nuevo, L. Toffolatti, Davide Maino, Julian Borrill, Massimiliano Lattanzi, Will Handley, Jörg P. Rachen, M. Tenti, Anthony Lasenby, Fabio Finelli, E. Keihänen, Tiziana Trombetti, E. Di Valentino, Francesca Perrotta, Sophie Henrot-Versille, E. Franceschi, Gianmarco Maggio, F. Cuttaia, Fabrizio Villa, J.-P. Bernard, Torsten A. Enßlin, D. Herranz, D. Paoletti, Paolo Natoli, A. Karakci, F. Vansyngel, P. Bielewicz, W. C. Jones, Julien Carron, Peter G. Martin, S. Galeotta, Yin-Zhe Ma, K. Benabed, K. Ganga, Jose M. Diego, J. R. Bond, F. Piacentini, Soumen Basak, M. Reinecke, R. A. Sunyaev, Chiara Sirignano, G. de Zotti, F. Couchot, Franz Elsner, B. P. Crill, B. Van Tent, Nicola Vittorio, V. Lindholm, Jason D. McEwen, Martin Kunz, Carlo Burigana, Nicoletta Krachmalnicoff, Mathieu Remazeilles, Jon E. Gudmundsson, A. de Rosa, Locke D. Spencer, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Canadian Institute for Theoretical Astrophysics (CITA), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Dipartimento di Fisica [Roma La Sapienza], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica 'G. Galilei', Universita degli Studi di Padova, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), University of Manchester [Manchester], University of British Columbia (UBC), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Planck Collaboration, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS), Sorbonne Université (SU)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2020-....] (UGA [2020-....])-Institut polytechnique de Grenoble - Grenoble Institute of Technology [2020-....] (Grenoble INP [2020-....]), Université Grenoble Alpes [2020-....] (UGA [2020-....]), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Planck, Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Météo France-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Météo France-Université Toulouse III - Paul Sabatier (UT3), Aghanim N., Akrami Y., Ashdown M., Aumont J., Baccigalupi C., Ballardini M., Banday A.J., Barreiro R.B., Bartolo N., Basak S., Benabed K., Bernard J.-P., Bersanelli M., Bielewicz P., Bond J.R., Borrill J., Bouchet F.R., Boulanger F., Bucher M., Burigana C., Calabrese E., Cardoso J.-F., Carron J., Challinor A., Chiang H.C., Colombo L.P.L., Combet C., Couchot F., Crill B.P., Cuttaia F., De Bernardis P., De Rosa A., De Zotti G., Delabrouille J., Delouis J.-M., Di Valentino E., Diego J.M., Dore O., Douspis M., Ducout A., Dupac X., Efstathiou G., Elsner F., Ensslin T.A., Eriksen H.K., Falgarone E., Fantaye Y., Finelli F., Frailis M., Fraisse A.A., Franceschi E., Frolov A., Galeotta S., Galli S., Ganga K., Genova-Santos R.T., Gerbino M., Ghosh T., Gonzalez-Nuevo J., Gorski K.M., Gratton S., Gruppuso A., Gudmundsson J.E., Handley W., Hansen F.K., Henrot-Versille S., Herranz D., Hivon E., Huang Z., Jaffe A.H., Jones W.C., Karakci A., Keihanen E., Keskitalo R., Kiiveri K., Kim J., Kisner T.S., Krachmalnicoff N., Kunz M., Kurki-Suonio H., Lagache G., Lamarre J.-M., Lasenby A., Lattanzi M., Lawrence C.R., Levrier F., Liguori M., Lilje P.B., Lindholm V., Lopez-Caniego M., Ma Y.-Z., Macias-Perez J.F., Maggio G., Maino D., Mandolesi N., Mangilli A., Martin P.G., Martinez-Gonzalez E., Matarrese S., Mauri N., McEwen J.D., Melchiorri A., Mennella A., Migliaccio M., Miville-Deschenes M.-A., Molinari D., Moneti A., Montier L., Morgante G., Moss A., Mottet S., Natoli P., Pagano L., Paoletti D., Partridge B., Patanchon G., Patrizii L., Perdereau O., Perrotta F., Pettorino V., Piacentini F., Puget J.-L., Rachen J.P., Reinecke M., Remazeilles M., Renzi A., Rocha G., Roudier G., Salvati L., Sandri M., Savelainen M., Scott D., Sirignano C., Sirri G., Spencer L.D., Sunyaev R., Suur-Uski A.-S., Tauber J.A., Tavagnacco D., Tenti M., Toffolatti L., Tomasi M., Tristram M., Trombetti T., Valiviita J., Vansyngel F., Van Tent B., Vibert L., Vielva P., Villa F., Vittorio N., Wandelt B.D., Wehus I.K., Zonca A., Ministerio de Economía y Competitividad (España), Consejo Superior de Investigaciones Científicas (España), European Commission, European Research Council, European Space Agency, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Università degli Studi di Padova = University of Padua (Unipd), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Universidad de Cantabria, Department of Physics, Helsinki Institute of Physics, and Doctoral Programme in Particle Physics and Universe Sciences

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astronomy, Cosmic microwave background, Cosmic background radiation, FOS: Physical sciences, Astrophysics, cosmic background radiation, Surveys, 01 natural sciences, Cosmology: observation, NO, symbols.namesake, Settore FIS/05 - Astronomia e Astrofisica, surveys, 0103 physical sciences, Calibration, Planck, observations [Cosmology], data analysis [Methods], 010303 astronomy & astrophysics, Reionization, LATITUDE MOLECULAR GAS, Physics, SPECTRUM, 010308 nuclear & particles physics, cosmology: observations, methods: data analysis, Settore FIS/05, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, 115 Astronomy, Space science, Computational physics, MODEL, Dipole, Amplitude, SKY MAPS, Cosmic background radiation, Cosmology: observations, Methods: data analysis, Surveys, Space and Planetary Science, SEPARATION, symbols, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics, Methods: data analysi
Abstract

Planck Collaboration: et al., This paper presents the High Frequency Instrument (HFI) data processing procedures for the Planck 2018 release. Major improvements in mapmaking have been achieved since the previous Planck 2015 release, many of which were used and described already in an intermediate paper dedicated to the Planck polarized data at low multipoles. These improvements enabled the first significant measurement of the reionization optical depth parameter using Planck-HFI data. This paper presents an extensive analysis of systematic effects, including the use of end-to-end simulations to facilitate their removal and characterize the residuals. The polarized data, which presented a number of known problems in the 2015 Planck release, are very significantly improved, especially the leakage from intensity to polarization. Calibration, based on the cosmic microwave background (CMB) dipole, is now extremely accurate and in the frequency range 100–353 GHz reduces intensity-to-polarization leakage caused by calibration mismatch. The Solar dipole direction has been determined in the three lowest HFI frequency channels to within one arc minute, and its amplitude has an absolute uncertainty smaller than 0.35 μK, an accuracy of order 10−4. This is a major legacy from the Planck HFI for future CMB experiments. The removal of bandpass leakage has been improved for the main high-frequency foregrounds by extracting the bandpass-mismatch coefficients for each detector as part of the mapmaking process; these values in turn improve the intensity maps. This is a major change in the philosophy of “frequency maps”, which are now computed from single detector data, all adjusted to the same average bandpass response for the main foregrounds. End-to-end simulations have been shown to reproduce very well the relative gain calibration of detectors, as well as drifts within a frequency induced by the residuals of the main systematic effect (analogue-to-digital convertor non-linearity residuals). Using these simulations, we have been able to measure and correct the small frequency calibration bias induced by this systematic effect at the 10−4 level. There is no detectable sign of a residual calibration bias between the first and second acoustic peaks in the CMB channels, at the 10−3 level., The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA, and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); ERC and PRACE (EU). A description of the Planck Collaboration and a list of its members, indicating which technical or scientific activities they have been involved in, can be found at http://www.cosmos.esa.int/web/planck/planckcollaboration.

Published
2020

26. Planck 2018 results: II. Low Frequency Instrument data processing

Author

Akrami, Y., Argüeso, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., Basak, S., Benabed, K., Bernard, J. P., Bersanelli, M., Bielewicz, P., Bonavera, L., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bucher, M., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. F., Colombo, L. P.L., Crill, B. P., Cuttaia, F., De Bernardis, P., De Rosa, A., De Zotti, G., Delabrouille, J., Di Valentino, E., Dickinson, C., Diego, J. M., Donzelli, S., Ducout, A., Dupac, X., Efstathiou, G., Elsner, F., Enßlin, T. A., Eriksen, H. K., Fantaye, Y., Finelli, F., Frailis, M., Franceschi, E., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Génova-Santos, R. T., Gerbino, M., Ghosh, T., González-Nuevo, J., Górski, K. M., Gratton, S., Gruppuso, A., Gudmundsson, J. E., Handley, W., Hansen, F. K., Herranz, D., Hivon, E., Huang, Z., Jaffe, A. H., Jones, W. C., Karakci, A., Keihänen, E., Keskitalo, R., Kiiveri, K., Kim, Jaiseung, Kisner, T. S., Krachmalnicoff, N., Kunz, M., Kurki-Suonio, H., Lamarre, J. M., Lasenby, A., Lattanzi, M., Lawrence, C. R., Leahy, J. P., Levrier, F., Liguori, M., Lilje, P. B., Lindholm, V., López-Caniego, M., Ma, Y. Z., Maciás-Pérez, J. F., Maggio, G., Maino, D., Mandolesi, N., Mangilli, A., Maris, M., Martin, P. G., Martínez-González, E., Matarrese, S., Mauri, N., McEwen, J. D., Meinhold, P. R., Melchiorri, A., Mennella, A., Migliaccio, M., Molinari, D., Montier, L., Morgante, G., Moss, A., Natoli, P., Pagano, L., Paoletti, D., Partridge, B., Patanchon, G., Patrizii, L., Peel, M., Perrotta, F., Pettorino, V., Piacentini, F., Polenta, G., Puget, J. L., Rachen, J. P., Racine, B., Reinecke, M., Remazeilles, M., Renzi, A., Rocha, G., Roudier, G., Rubiño-Martín, J. A., Salvati, L., Sandri, M., Savelainen, M., Scott, D., Seljebotn, D. S., Sirignano, C., Sirri, G., Spencer, L. D., Suur-Uski, A. S., Tauber, J. A., Tavagnacco, D., Tenti, M., Terenzi, L., Toffolatti, L., Tomasi, M., Trombetti, T., Valiviita, J., Vansyngel, F., Van Tent, B., Vielva, P., Villa, F., Vittorio, N., Wandelt, B. D., Watson, R., Wehus, I. K., Zacchei, A., Zonca, A., Astrophysique, Laboratoire de physique de l'ENS - ENS Paris (LPENS), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Università degli studi di Parma = University of Parma (UNIPR), Canadian Institute for Theoretical Astrophysics (CITA), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Patrimoine, Littérature, Histoire (PLH), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Universidade Aberta [Lisboa], Dipartimento di Fisica [Roma La Sapienza], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Phytosanitary Diagnostics and Forecasts, All-Russian Institute for Plant Protection, Russian Academy of Sciences [Moscow] (RAS), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (AOSS), University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), ICRA and Physics Department, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Dipartimento di Fisica 'G. Galilei', Università degli Studi di Padova = University of Padua (Unipd), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), University of Manchester [Manchester], Venetian Institute Molecular Medicine (VIMM), University of British Columbia (UBC), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), School of Psychology, University of Queensland [Brisbane], Planck Collaboration, Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), University of Parma = Università degli studi di Parma [Parme, Italie], Laboratoire de Recherche en Informatique (LRI), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CentraleSupélec, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Universita degli Studi di Padova, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de neurobiologie cellulaire et moléculaire (NBCM), Centre National de la Recherche Scientifique (CNRS), Leiden University, University of Oviedo, University of Cambridge, Université Paul Sabatier, International School for Advanced Studies, University of the Western Cape, IRAP, Universidad de Cantabria, University of Padova, Indian Institute of Science Education and Research Thiruvananthapuram, Institut d 'Astrophysique de Paris, University of Milano, University of Toronto, Lawrence Berkeley National Laboratory, Université Paris-Sud, Université Pierre and Marie Curie, University of Ferrara, National Research Council of Italy, Cardiff University, California Institute of Technology, Sapienza University of Rome, INAF - Osservatorio Astronomico di Padova, University of Manchester, Imperial College London, European Space Astronomy Centre, Max-Planck-Institut für Astrophysik, University of Oslo, African Institute for Mathematical Sciences, Osservatorio Astronomico di Trieste, Simon Fraser University, University of Chicago, University of La Laguna, Stockholm University, Cahill Center for Astronomy and Astrophysics, Jet Propulsion Laboratory, Princeton University, Sun Yat-Sen University, University of Helsinki, Observatoire de Paris, Institut national de physique nucléaire et de physique des particules, National Institute for Nuclear Physics, University College London, University of California Santa Barbara, University of Rome Tor Vergata, University of Nottingham, Haverford College, Universidade de São Paulo, Université Paris-Saclay, Agenzia Spaziale Italiana, Radboud University Nijmegen, Department of Applied Physics, University of British Columbia, European Space Research and Technology Centre, Università Degli Studi di Trieste, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, University of Illinois at Urbana-Champaign, University of California San Diego, Aalto-yliopisto, and Aalto University

Subjects
instruments [Space vehicles], cosmic background radiation, space vehicles: instruments, Cosmic background radiation, data analysis [Methods], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], methods: data analysis
Abstract

International audience; We present a final description of the data-processing pipeline for the Planck Low Frequency Instrument (LFI), implemented for the 2018 data release. Several improvements have been made with respect to the previous release, especially in the calibration process and in the correction of instrumental features such as the effects of nonlinearity in the response of the analogue-to-digital converters. We provide a brief pedagogical introduction to the complete pipeline, as well as a detailed description of the important changes implemented. Self-consistency of the pipeline is demonstrated using dedicated simulations and null tests. We present the final version of the LFI full sky maps at 30, 44, and 70 GHz, both in temperature and polarization, together with a refined estimate of the solar dipole and a final assessment of the main LFI instrumental parameters.

Published
2020

27. PEDOT:PSS-based micromuscles and microsensors fully integrated in flexible chips

Author

Sébastien Grondel, Eric Cattan, Giao T. M. Nguyen, Laureline Seurre, Kätlin Rohtlaid, Garrett Curley, Cédric Plesse, Frédéric Vidal, Caroline Soyer, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN (MAMINA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centrale de Micro Nano Fabrication - IEMN (CMNF - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA), 857263 Twinnims, H2020 Widespread, N° 641822 – MICACT, H2020 Marie Skłodowska-Curie Actions, ANR-11-EQPX-0025, Agence Nationale de la Recherche, Renatech Network, ANR-11-EQPX-0025,LEAF,Plateforme de traitement laser pour l'électronique flexible multifonctionnelle(2011), European Project: 857263,H2020-EU.4.b.,TWINNIMS(2019), European Project: 641822,H2020,H2020-MSCA-ITN-2014,MICACT(2015), Centrale de Micro Nano Fabrication - IEMN (CMNF-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)

Subjects
[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Materials science, Nanotechnology, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 3. Good health, 0104 chemical sciences, [SPI]Engineering Sciences [physics], PEDOT:PSS, Mechanics of Materials, Signal Processing, General Materials Science, Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Civil and Structural Engineering
Abstract

The demand for polymer-based soft micro-electro-mechanical systems (MEMS) is growing due to the substantial increase of flexible and wearable electronic devices. In this context, electronically conducting polymers (ECPs) fulfil the requirements for soft MEMS by offering the possibility of actuation and sensing, however, their miniaturization, their integration attempts and their resulting performances are still limiting their use in real applications. In this work, elaboration, integration and operation of soft and efficient microtransducers based on commercially available poly(3,4-ethyledioxythiophene):poly(styrene sulfonate) conductive ink into flexible chips is demonstrated. This original process overcomes existing hurdles to the fabrication of fully integrated ECP-based devices with gold remote contacts directly in contact with ECPs and further embedding in flexible support. These batch-fabricated chips are actuated at low voltage (±3.0 V) in open-air with individual accessible electrical connections. More importantly, the mechanical strain sensing is evidenced for the first time on such small ECP-based devices after full integration and demonstrating low impact of the microfabrication process. This work opens the way for further development of soft ECP-MEMS and integration into more complex systems with possible applications in microrobotics, microfluidics, optoelectronics, biology, medicine or space.

Published
2020

28. Planck 2018 results: V. CMB power spectra and likelihoods

Author

Aghanim, N., Akrami, Yashar, Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., Basak, S., Benabed, K., Bernard, J.-P., Bersanelli, M., Bielewicz, P., Bock, J. J., Bond, J. R., Borrill, J., Bouchet, F. R., Boulanger, F., Bucher, M., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J.-F., Carron, J., Casaponsa, B., Challinor, A., Chiang, H. C., Colombo, L. P. L., Combet, C., Crill, B. P., Cuttaia, F., De Bernardis, P., De Rosa, A., De Zotti, G., Delabrouille, J., Delouis, J.-M., Di Valentino, E., Diego, J. M., Doré, O., Douspis, M., Ducout, A., Dupac, X., Dusini, S., Efstathiou, G., Elsner, F., Enßlin, T. A., Eriksen, H. K., Fantaye, Y., Fernandez-Cobos, R., Finelli, F., Frailis, M., Fraisse, A. A., Franceschi, E., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Génova-Santos, R. T., Gerbino, M., Ghosh, T., Giraud-Héraud, Y., González-Nuevo, J., Górski, K. M., Gratton, Serge, Gruppuso, A., Gudmundsson, J. E., Hamann, J., Handley, W., Hansen, F. K., Herranz, D., Hivon, E., Huang, Z., Jaffe, A. H., Jones, W. C., Keihänen, E., Keskitalo, R., Kiiveri, K., Kim, J., Kisner, T. S., Krachmalnicoff, N., Kunz, M., Kurki-Suonio, H., Lagache, G., Lamarre, J.-M., Lasenby, A., Lattanzi, M., Lawrence, C. R., Le Jeune, M., Levrier, F., Lewis, A., Liguori, M., Lilje, P. B., Lilley, M., Lindholm, V., López-Caniego, M., Lubin, P. M., Ma, Y.-Z., Macías-Pérez, J. F., Maggio, G., Maino, D., Mandolesi, N., Mangilli, A., Marcos-Caballero, A., Maris, M., Martin, P. G., Martínez-González, E., Matarrese, S., Mauri, N., McEwen, J. D., Meinhold, P. R., Melchiorri, A., Mennella, A., Migliaccio, M., Millea, M., Miville-Deschênes, M.-A., Molinari, D., Moneti, A., Montier, L., Morgante, G., Moss, A., Natoli, P., Nørgaard-Nielsen, H. U., Pagano, L., Paoletti, D., Partridge, B., Patanchon, G., Peiris, H. V., Perrotta, F., Pettorino, V., Piacentini, F., Polenta, G., Puget, J.-L., Rachen, J. P., Reinecke, M., Remazeilles, M., Renzi, A., Rocha, G., Rosset, C., Roudier, G., Rubiño-Martín, J. A., Ruiz-Granados, B., Salvati, L., Sandri, M., Savelainen, M., Scott, D., Shellard, E. P. S., Sirignano, C., Sirri, G., Spencer, L. D., Sunyaev, R., Suur-Uski, A.-S., Tauber, J. A., Tavagnacco, D., Tenti, M., Toffolatti, L., Tomasi, M., Trombetti, T., Valiviita, J., Van Tent, B., Vielva, P., Villa, F., Vittorio, N., Wandelt, B. D., Wehus, I. K., Zacchei, A., Zonca, A., Université Paris-Sud, École normale supérieure, University of Cambridge, Université Paul Sabatier, International School for Advanced Studies, University of the Western Cape, IRAP, Universidad de Cantabria, University of Padova, Indian Institute of Science Education and Research Thiruvananthapuram, Institut d 'Astrophysique de Paris, University of Milano, National Centre for Nuclear Research, California Institute of Technology, University of Toronto, Lawrence Berkeley National Laboratory, Université Pierre and Marie Curie, University of Ferrara, National Research Council of Italy, Cardiff University, University of Sussex, University of KwaZulu-Natal, Institut national de physique nucléaire et de physique des particules, Sapienza University of Rome, INAF - Osservatorio Astronomico di Padova, Université de Bretagne Occidentale, University of Manchester, The University of Tokyo, European Space Astronomy Centre, National Institute for Nuclear Physics, Max-Planck-Institut für Astrophysik, University of Oslo, African Institute for Mathematical Sciences, Osservatorio Astronomico di Trieste, Princeton University, Simon Fraser University, University of La Laguna, United States Department of Energy, Cahill Center for Astronomy and Astrophysics, University of Oviedo, Jet Propulsion Laboratory, University of New South Wales, Sun Yat-Sen University, Imperial College London, University of Helsinki, CNRS, UMR7095, University of California Santa Barbara, University College London, University of Rome Tor Vergata, University of California Davis, Université Paris-Saclay, University of Nottingham, Technical University of Denmark, Haverford College, Agenzia Spaziale Italiana, Radboud University Nijmegen, Department of Applied Physics, University of British Columbia, European Space Research and Technology Centre, Università Degli Studi di Trieste, Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, University of California San Diego, Aalto-yliopisto, Aalto University, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Astrophysique, Laboratoire de physique de l'ENS - ENS Paris (LPENS), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Computing and Mathematical Sciences [Pasadena]], California Institute of Technology (CALTECH), Canadian Institute for Theoretical Astrophysics (CITA), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Dipartimento di Fisica [Roma La Sapienza], Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica 'G. Galilei', Università degli Studi di Padova = University of Padua (Unipd), Institut Lagrange de Paris, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), University College of London [London] (UCL), University of Manchester [Manchester], University of British Columbia (UBC), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Planck Collaboration, Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Sorbonne Université (SU)-École normale supérieure - Paris (ENS Paris), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome], Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Universita degli Studi di Padova, Sorbonne Université (SU), Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)

Subjects
cosmology: observations, Cosmological parameters, cosmic background radiation, cosmological parameters, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Cosmic background radiation, observations [Cosmology], data analysis [Methods], methods: data analysis
Abstract

International audience; We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid method using different approximations at low (ℓ < 30) and high (ℓ ≥ 30) multipoles, implementing several methodological and data-analysis refinements compared to previous releases. With more realistic simulations, and better correction and modelling of systematic effects, we can now make full use of the CMB polarization observed in the High Frequency Instrument (HFI) channels. The low-multipole EE cross-spectra from the 100 GHz and 143 GHz data give a constraint on the ΛCDM reionization optical-depth parameter τ to better than 15% (in combination with the TT low-ℓ data and the high-ℓ temperature and polarization data), tightening constraints on all parameters with posterior distributions correlated with τ. We also update the weaker constraint on τ from the joint TEB likelihood using the Low Frequency Instrument (LFI) channels, which was used in 2015 as part of our baseline analysis. At higher multipoles, the CMB temperature spectrum and likelihood are very similar to previous releases. A better model of the temperature-to-polarization leakage and corrections for the effective calibrations of the polarization channels (i.e., the polarization efficiencies) allow us to make full use of polarization spectra, improving the ΛCDM constraints on the parameters θMC, ωc, ωb, and H0 by more than 30%, and ns by more than 20% compared to TT-only constraints. Extensive tests on the robustness of the modelling of the polarization data demonstrate good consistency, with some residual modelling uncertainties. At high multipoles, we are now limited mainly by the accuracy of the polarization efficiency modelling. Using our various tests, simulations, and comparison between different high-multipole likelihood implementations, we estimate the consistency of the results to be better than the 0.5 σ level on the ΛCDM parameters, as well as classical single-parameter extensions for the joint likelihood (to be compared to the 0.3 σ levels we achieved in 2015 for the temperature data alone on ΛCDM only). Minor curiosities already present in the previous releases remain, such as the differences between the best-fit ΛCDM parameters for the ℓ < 800 and ℓ > 800 ranges of the power spectrum, or the preference for more smoothing of the power-spectrum peaks than predicted in ΛCDM fits. These are shown to be driven by the temperature power spectrum and are not significantly modified by the inclusion of the polarization data. Overall, the legacy Planck CMB likelihoods provide a robust tool for constraining the cosmological model and represent a reference for future CMB observations.

Published
2020

29. Futures of Education - GHOU 2020

Author

Rollinde, Emmanuel, pennypacker, Carl, Doran, Rosa, Darhmanoui, Hassane, Handa, Toshihiro, Kothari, Kathan, Lewis, Fraser, Robberstad, Janne, Megowan, Colleen, Université de Cergy Pontoise (UCP), Université Paris-Seine, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université Paris Diderot - Paris 7 (UPD7)-Université d'Artois (UA), G-HOU, Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), and Rollinde, Emmanuel

Subjects
[SHS.EDU]Humanities and Social Sciences/Education, [SHS.EDU] Humanities and Social Sciences/Education, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We report the focus-group discussion organized during the annual GHOU meeting, with the intention to contribute to UNESCO 2021 report on Future of Education. We focused on two of the four core areas that the Unesco Commission has identified : Citizenship and participation; Knowledge production, access and governance.

Published
2020

30. Electricity for Fluidics and Bio-Devices

Author

Thi Hong Nhung Dinh, Stéphane Serfaty, Marie Frénéa-Robin, Bruno Le Pioufle, Sung Jae Kim, Pierre-Yves Joubert, Hyomin Lee, Jeju National University (KOREA), Seoul National University [Seoul] (SNU), Ampère, Département Bioingénierie (BioIng), Ampère (AMPERE), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut d'Alembert (IDA), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), Bio-MIcroSystèmes et BioSensors (SATIE-BIOMIS), Systèmes d'Information et d'Analyse Multi-Echelles (SIAME), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay), Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Barbillon G., Bosseboeuf A., Chun K., Ferrigno R., and Français O. (eds)

Subjects
Electromagnetic field, Materials science, business.industry, 02 engineering and technology, Dielectric, Dielectrophoresis, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrostatics, 01 natural sciences, 0104 chemical sciences, Electrokinetic phenomena, Electric field, Optoelectronics, Fluidics, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, business, Electrorotation, ComputingMilieux_MISCELLANEOUS
Abstract

This chapter is focused on biomaterial interaction with electromagnetic fields. It gives a wide and deep introduction of biological medium and their electromagnetic properties, which can be used to sense and analyze tissue or cells within lab-on-chip. It consists of three complementary parts. A recall of electrokinetics laws is done and is applied to biological medium (electrolyte with fluid motion) in the first section. The scaling factor towards nano-scale is highlighted considering the ionic concentration distribution. The second section deals with dielectrophoresis forces (DEP), which results from the cell polarization under non-uniform electric field. The dielectric modeling of cells and their DEP response are depicted. Taking benefits of cell dielectric behavior, the applications such as cell sorting, trapping and characterization with electrorotation are presented. The last section introduces the biomaterial behavior at radiofrequency range (from MHz up to several tens of GHz). Applications using thee relaxation times occurring at such high frequency are described to sense or characterize biological medium. Electric Impedance Spectroscopy and Radio-Frequency devices are thus introduced.

Published
2020

31. Diffusion and dissipation in acoustic propagation simulation by convection-pressure split algorithms in all Mach number form

Author

Erik Dick, Yann Moguen, Systèmes d'Information et d'Analyse Multi-Echelles (SIAME), Systèmes et Applications des Technologies de l'Information et de l'Energie (SATIE), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École normale supérieure - Rennes (ENS Rennes)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME), and Université de Pau et des Pays de l'Adour (UPPA)

Subjects
Physics, Numerical Analysis, Diffusion (acoustics), Finite volume method, Physics and Astronomy (miscellaneous), Applied Mathematics, Upwind scheme, 010103 numerical & computational mathematics, 01 natural sciences, Compressible flow, Riemann solver, Computer Science Applications, Euler equations, Physics::Fluid Dynamics, 010101 applied mathematics, Computational Mathematics, symbols.namesake, AUSM, Mach number, Modeling and Simulation, symbols, 0101 mathematics, [MATH]Mathematics [math], Algorithm
Abstract

The topic of the paper is accuracy analysis of acoustic propagation simulation in low Mach number flows, by finite volume co-located discretisation methods of the time-dependent compressible fluid Euler equations that use the concept of convection-pressure splitting (CPS). These are algorithms that split the flux vectors into a part associated to the convection by the fluid particles, and a part associated to the propagation of the pressure waves. For the convection part, the appropriate space discretisation is the upwind one. For the pressure part, there are alternatives. We discern five types of algorithms that all are adapted for use in low Mach number flows, and thus are considered as all Mach number algorithms. We study the behaviour of the different types for the propagation of small pressure perturbations, of discontinuous or smooth shape, in low Mach number flows. We demonstrate that four of the proposed algorithms of convection-pressure split type are dissipative for such applications, although they are designed for low Mach number flows. The objective of the paper is to analyse why some algorithms are appropriate for acoustic propagation simulation and why some are not appropriate.

Published
2020

32. Double-peak emission line galaxies in the SDSS catalogue

Author

Daniel Maschmann, Igor Chilingarian, Anne-Laure Melchior, Gary A. Mamon, Ivan Yu. Katkov, Institute for Industrial Management [RWTH Aachen University] (FIR e.V. an der RWTH Aachen), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris - Site de Paris (OP), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)

Subjects
Absolute magnitude, Stellar mass, Metallicity, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Disc galaxy, 01 natural sciences, Luminosity, Bulge, 0103 physical sciences, galaxies: interactions, 10. No inequality, 010303 astronomy & astrophysics, galaxies: irregular, galaxies: kinematics and dynamics, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Star formation, Astronomy and Astrophysics, galaxies: general, methods: data analysis, Astrophysics - Astrophysics of Galaxies, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), ddc:520, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], techniques: spectroscopic
Abstract

Mergers can be detected as double-peak narrow emission line galaxies but they are difficult to disentangle from disc rotations and gas outflows. We aim to properly detect such galaxies and distinguish the underlying mechanisms. Relying on RCSED, we developed an automated selection procedure and found 5663 double-peak emission line galaxies at z, 30 pages, 27 figures, article accepted to A&A

Published
2020

33. Leptospira spp. Toolbox for Chemotaxis Assay

Author

Ambroise Lambert, Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
0303 health sciences, 030306 microbiology, Motility, Chemotaxis, Soft Agar Assay, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, [SDV.CAN]Life Sciences [q-bio]/Cancer, [SDV.BC.BC]Life Sciences [q-bio]/Cellular Biology/Subcellular Processes [q-bio.SC], Biology, biology.organism_classification, [SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology, Microbiology, [SDV.BBM.BP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biophysics, 03 medical and health sciences, Leptospira, [SDV.MHEP.MI]Life Sciences [q-bio]/Human health and pathology/Infectious diseases, embryonic structures, Leptospira interrogans, 030304 developmental biology, Chemotaxis assay
Abstract

International audience; Abstract We developed an invasion assay by using microfabricated culture devices. First, ovarian tumor spheroids were generated with a culture patch device consisting of an agarose membrane formed with a honeycomb microframe – the patch – and gelatin nanofiber backbone. By changing the dimensions of the honeycomb compartments we were able to control the number of cells and size of the spheroids. When the spheroids were placed on a patch coated with a thin membrane of fibrillary type I collagen, spheroid disruption was observed due to substrate induced cell migration. This process is straightforward and should be applicable to other cancer types, as well as assays under microfluidic conditions, thereby holding the potential for use in tumor modeling and anti-cancer drug development.

Published
2020

34. Dynamic crosslinked rubbers for a green future: A material perspective

Author

Christopher R. Bowen, Chaoying Wan, Alan M. Wemyss, Frédéric Vidal, Cédric Plesse, Cédric Vancaeyzeele, Giao T. M. Nguyen, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Materials science, Vulcanisation, Supramolecular chemistry, Self-healing, 02 engineering and technology, Vitrimers, 010402 general chemistry, Elastomer, 01 natural sciences, 12. Responsible consumption, law.invention, Natural rubber, Materials Science(all), law, General Materials Science, Thermal stability, Recycling, ComputingMilieux_MISCELLANEOUS, Dynamic chemistry, Polymer science, Mechanical Engineering, Vulcanization, SDG 8 - Decent Work and Economic Growth, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Supramolecular interactions, Sustainable, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, 13. Climate action, Mechanics of Materials, visual_art, 8. Economic growth, visual_art.visual_art_medium, Chemical stability, Rubber, 0210 nano-technology, SDG 12 - Responsible Consumption and Production
Abstract

Conventional rubber products, such as tires, seals, tubing, and damping systems are manufactured via a vulcanization process, which forms covalently crosslinked network structures and ensures mechanical robustness, thermal stability and chemical resistance. However, the covalent networks are permanent and these products cannot be reprocessed or reshaped, which makes vulcanised rubbers one of the major challenges facing waste management and the circular economy. To reduce waste pollution for products such as tires, conventional vulcanised rubbers must be replaced with reversibly crosslinked structures which are able to achieve mechanical robustness and chemical stability, whilst also being able to be reprocessed, reshaped, reused and recycled. State-of-the-art developments in supramolecular chemistry have shed light on a new generation of reprocessable elastomers and rubbers, which have the potential to tackle the long-standing issue of waste tire pollution. The introduction of dynamic covalent bonds or supramolecular interactions in traditional elastomers can produce reversibly crosslinked structures, where the synergy between the dynamic bonds in the network are carefully optimised to balance the ease of processing, mechanical properties, and structural stability. Furthermore, dynamic covalent bonds and supramolecular interactions can provide ‘living’ functions to elastomers, such as self-healing and stimuli-responsiveness. These properties can be further enhanced by the addition of nanofillers with tailored surface chemistry to provide a dual role as a dynamic crosslinker and reinforcing element. To create reprocessable and recyclable elastomers, the coupling of multiple dynamic interactions provides unlimited possibilities to optimise the structure and properties of recyclable rubbers. Here we critically overview the applications of dynamic chemistry in rubbers, with a focus on macromolecular design and strategies to balance the mechanical, functional (e.g. self-healing) and reprocessing properties.

Published
2020

35. Stretchable and Transparent Conductive PEDOT:PSS‐Based Electrodes for Organic Photovoltaics and Strain Sensors Applications

Author

Thomas D. Anthopoulos, Emre Yengel, Xavier Sallenave, Yuanbao Lin, Cédric Plesse, Emilie Dauzon, Fabrice Goubard, Hendrik Faber, Aram Amassian, King Abdullah University of Science and Technology (KAUST), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), CY Cergy Paris Université (CY), and Université Paris-Seine

Subjects
Materials science, Organic solar cell, Nanotechnology, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, [SPI.MAT]Engineering Sciences [physics]/Materials, Biomaterials, [CHIM.POLY]Chemical Sciences/Polymers, PEDOT:PSS, Electrode, Electrochemistry, 0210 nano-technology, Science, technology and society, Electrical conductor, ComputingMilieux_MISCELLANEOUS
Abstract

he authors acknowledge King Abdullah University of Science and Technology (KAUST) for financial support. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079.

Published
2020

36. Interdisciplinarity in science teaching. Summer Institute/QUINT Conference 2020

Author

Copreaux, Lucie, Khanfour-Armalé, Rita, Rollinde, Emmanuel, Hauss, Florian, Bessonie, Marjorie, Samali, Lilia, Saussez, Philippe, Pommier, Mylène, Augustin, Florence, Laboratoire de Didactique André Revuz (LDAR (URP_4434)), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université de Lille-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Université Paris Cité (UPCité)-CY Cergy Paris Université (CY), Réseau des Lieux d'éducation associés à l'IFE-ENS de Lyon (LéA IFE), École normale supérieure de Lyon (ENS de Lyon), Université de Cergy Pontoise (UCP), Université Paris-Seine, Laboratoire de Didactique André Revuz (LDAR (EA_4434)), Université d'Artois (UA)-Université Paris Diderot - Paris 7 (UPD7)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Collège Pailleron, and Khanfour-Armalé, Rita

Subjects
[SHS.EDU]Humanities and Social Sciences/Education, [CHIM] Chemical Sciences, [SHS.EDU] Humanities and Social Sciences/Education, [CHIM]Chemical Sciences, [SHS] Humanities and Social Sciences, [SHS]Humanities and Social Sciences
Abstract

International audience

Published
2020

37. Laboratory evidence for asymmetric accretion structure upon slanted matter impact in young stars

Author

Rosaria Bonito, Salvatore Orlando, O. Willi, Julien Fuchs, S. N. Chen, K. F. Burdonov, Mirela Cerchez, J. Béard, G. Revet, S. A. Pikuz, M. V. Starodubtsev, Rafael L. Rodríguez, E. D. Filippov, Costanza Argiroffi, Andrea Ciardi, G. Espinosa, S. Bolanos, Michal Smid, Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Burdonov K., Revet G., Bonito R., Argiroffi C., Beard J., Bolanos S., Cerchez M., Chen S.N., Ciardi A., Espinosa G., Filippov E., Pikuz S., Rodriguez R., Smid M., Starodubtsev M., Willi O., Orlando S., Fuchs J., Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), INAF - Osservatorio Astronomico di Palermo (OAPa), Istituto Nazionale di Astrofisica (INAF), Università degli studi di Palermo - University of Palermo, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Horia Hulubei National Institute for Physics and Nuclear Engineering, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Universidad de las Palmas de Gran Canaria (ULPGC), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Institute of Applied Physics (IAP, Nizhny Novgorod), Moscow State Engineering Physics Institute (MEPhI), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), This work was partly done within the LABEX Plas@Par, the DIM ACAV funded by the Region Ilede-France, This work was supported by Grant No. 11-IDEX- 0004-02 from ANR (France), ANR-12-BS09-0025,SILAMPA,Simuler en laboratoire des écoulements de plasmas magnétisés pour l'astrophysique(2012), European Project: ERC787539,GENESIS, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Shock wave, stars, Accretion, Magnetohydrodynamics (MHD), Young stellar object, FOS: Physical sciences, X-rays: stars, Astrophysics, 01 natural sciences, Shock waves, Settore FIS/05 - Astronomia E Astrofisica, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Ejecta, 010303 astronomy & astrophysics, Chromosphere, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, pre-main sequence -X-rays, Astronomy and Astrophysics, Plasma, Planetary system, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], accretion disks -instabilities -magnetohydrodynamics (MHD) -shock waves -stars, Accretion (astrophysics), Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Instabilities, Accretion disks, Stars: pre-main sequence, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Aims. Investigating the process of matter accretion onto forming stars through scaled experiments in the laboratory is important in order to better understand star and planetary system formation and evolution. Such experiments can indeed complement observations by providing access to the processes with spatial and temporal resolution. A previous investigation revealed the existence of a two-component stream: a hot shell surrounding a cooler inner stream. The shell was formed by matter laterally ejected upon impact and refocused by the local magnetic field. That laboratory investigation was limited to normal incidence impacts. However, in young stellar objects, the complex structure of magnetic fields causes variability of the incident angles of the accretion columns. This led us to undertake an investigation, using laboratory plasmas, of the consequence of having a slanted accretion impacting a young star. Methods. Here, we used high power laser interactions and strong magnetic field generation in the laboratory, complemented by numerical simulations, to study the asymmetry induced upon accretion structures when columns of matter impact the surface of young stars with an oblique angle. Results. Compared to the scenario where matter accretes perpendicularly to the star surface, we observe a strongly asymmetric plasma structure, strong lateral ejecta of matter, poor confinement of the accreted material, and reduced heating compared to the normal incidence case. Thus, slanted accretion is a configuration that seems to be capable of inducing perturbations of the chromosphere and hence possibly influencing the level of activity of the corona.

Published
2020

38. Improved constraints on reionisation from CMB observations: A parameterisation of the kSZ effect

Author

Stéphane Ilić, Dominique Aubert, Mathieu Langer, Marian Douspis, Adélie Gorce, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Observatoire astronomique de Strasbourg (ObAS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Inflammasome NLRP3 – NLRP3 Inflammasome, Centre International de Recherche en Infectiologie (CIRI), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Rheinische Friedrich-Wilhelms-Universität Bonn, Centre International de Recherche en Infectiologie - UMR (CIRI), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmic microwave background, first stars, Cosmic background radiation, FOS: Physical sciences, Context (language use), Astrophysics, cosmic background radiation, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, 01 natural sciences, methods: analytical, 0103 physical sciences, 0201 Astronomical and Space Sciences, Radiative transfer, dark ages, 010303 astronomy & astrophysics, Reionization, Physics, 010308 nuclear & particles physics, Intensity mapping, Astrophysics::Instrumentation and Methods for Astrophysics, Spectral density, Astronomy and Astrophysics, Amplitude, Space and Planetary Science, astro-ph.CO, reionization, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We show that, in the context of patchy reionisation, an accurate description of the angular power spectrum of the kinetic Sunyaev-Zel'dovich (kSZ) effect is not possible with simple scaling relations between the amplitude of the spectrum and global parameters, such as the reionisation midpoint and its duration. We introduce a new parameterisation of this spectrum, based on a novel description of the power spectrum of the free electrons density contrast Pee (k,z) in terms of the reionisation global history and morphology. We directly relate features of the spectrum to the typical ionised bubble size at different stages in the process and, subsequently, to the angular scale at which the patchy kSZ power spectrum reaches its maximum. We successfully calibrated our results on a custom set of advanced radiative hydrodynamical simulations and later found our parameterisation to be a valid description of a wide range of other simulations and, therefore, reionisation physics. In the end, and as long as the global reionisation history is known, two parameters are sufficient to derive the angular power spectrum. Such an innovative framework applied to cosmic microwave background data and combined with 21cm intensity mapping will allow a first consistent detection of the amplitude and shape of the patchy kSZ signal, giving in turn access to the physics of early light sources., 14 pages, 12 figures. Accepted by A&A

Published
2020

39. Calibration and performance of the NIKA2 camera at the IRAM 30-m Telescope

Author

Shibo Shu, Peter A. R. Ade, A. Beelen, D. John, A. Andrianasolo, Florian Kéruzoré, Philip Daniel Mauskopf, Albrecht Sievers, L. Perotto, A. Catalano, F. Pierfederici, R. Zylka, Aurélien Benoit, Paulo J. V. Garcia, F. Mayet, A. Ritacco, V. Revéret, H. Roussel, Nicolas Ponthieu, R. Adam, J. Peñalver, S. Berta, C. Tucker, H. Aussel, O. Bourrion, Manuel Calvo, S. Navarro, J. F. Macías-Pérez, K. F. Schuster, E. F. C. Driessen, C. Romero, Pascale Andre, F.-X. Désert, Florian Ruppin, J.-F. Lestrade, G. Lagache, A. Bideaud, J. Goupy, Anaëlle Maury, Alessandro Monfardini, Bilal Ladjelate, B. Comis, Alicia Gomez, M. De Petris, Giampaolo Pisano, S. Leclercq, Simon Doyle, C. Kramer, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Cardiff University, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Hélium : du fondamental aux applications (NEEL - HELFA), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Cryogénie (NEEL - Cryo), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Universidad Católica del Norte [Antofagasta], Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de RadioAstronomía Milimétrica (IRAM), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Hélium : du fondamental aux applications (HELFA), Cryogénie (Cryo), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Agence Nationale de la Recherche (ANR), European Commission (EC), Ministerio de Economía y Competitividad (MINECO), Centre National D'Etudes Spatiales (CNES), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Perotto, L. [0000-0001-6937-5052], Ponthieu, N. [0000-0002-3101-0768], Marcías Pérez, F. J. [0000-0002-5385-2763], Désert, F. J. [0000-0001-6478-7883], Mayet, F. [0000-0001-9995-4792], Gómez, A. [0000-0002-8752-1401], De Petris, M. [0000-0001-7859-2139], Shu, S. [0000-0002-6370-2101], Mauskpf, P. [0000-0001-6397-5516], Aussel, H. [0000-0002-1371-5705], LabEx FOCUS, ANR-11-LABX-0013, French National Research Agency (ANR), ANR-15-CE31-0017, French National Research Agency in the framework of the 'Investissements d'avenir' program, ANR-15-IDEX-02, European Research Council Advanced Grant ORISTARS under the European Union's Seventh Framework Programme, Spanish Ministerio de Economia and Competitividad (MINECO), and Sapienza Universita' di Roma

Subjects
Physics - Instrumentation and Detectors, media_common.quotation_subject, FOS: Physical sciences, Context (language use), Field of view, Astrophysics, Large scale strcuture of universe, general [Submillimeter], 7. Clean energy, 01 natural sciences, law.invention, Telescope, law, 0103 physical sciences, Calibration, observational [Methods], Angular resolution, instrumentation, photometers, methods, observational, data analysis, submillimeter, general, large-scale structure of Universe, ISM, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 14. Life underwater, data analysis [Methods], 010306 general physics, 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Remote sensing, media_common, ISM: general, Physics, general [ISM], Astronomy and Astrophysics, submillimeter: general, Instrumentation and Detectors (physics.ins-det), methods: data analysis, Photometry (astronomy), instrumentation: photometers, photometers [Instrumentation], 13. Climate action, Space and Planetary Science, Sky, Millimeter, methods: observational, Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Context. NIKA2 is a dual-band millimetre continuum camera of 2 900 kinetic inductance detectors, operating at 150 and 260 GHz, installed at the IRAM 30-m telescope in Spain. Open to the scientific community since October 2017, NIKA2 will provide key observations for the next decade to address a wide range of open questions in astrophysics and cosmology. Aims. Our aim is to present the calibration method and the performance assessment of NIKA2 after one year of observation. Methods. We used a large data set acquired between January 2017 and February 2018 including observations of primary and secondary calibrators and faint sources that span the whole range of observing elevations and atmospheric conditions encountered by the IRAM 30-m telescope. This allowed us to test the stability of the performance parameters against time evolution and observing conditions. We describe a standard calibration method, referred to as the "Baseline"method, to translate raw data into flux density measurements. This includes the determination of the detector positions in the sky, the selection of the detectors, the measurement of the beam pattern, the estimation of the atmospheric opacity, the calibration of absolute flux density scale, the flat fielding, and the photometry. We assessed the robustness of the performance results using the Baseline method against systematic effects by comparing results using alternative methods. Results. We report an instantaneous field of view of 6.5′ in diameter, filled with an average fraction of 84%, and 90% of valid detectors at 150 and 260 GHz, respectively. The beam pattern is characterised by a FWHM of 17.6″ ± 0.1″ and 11.1″ ± 0.2″, and a main-beam efficiency of 47%±3%, and 64%±3% at 150 and 260 GHz, respectively. The point-source rms calibration uncertainties are about 3% at 150 GHz and 6% at 260 GHz. This demonstrates the accuracy of the methods that we deployed to correct for atmospheric attenuation. The absolute calibration uncertainties are of 5%, and the systematic calibration uncertainties evaluated at the IRAM 30-m reference Winter observing conditions are below 1% in both channels. The noise equivalent flux density at 150 and 260 GHz are of 9 ± 1 mJy s1/2 and 30 ± 3 mJy s1/2. This state-of-the-art performance confers NIKA2 with mapping speeds of 1388 ± 174 and 111 ± 11 arcmin2 mJy-2 h-1 at 150 and 260 GHz. Conclusions. With these unique capabilities of fast dual-band mapping at high (better that 18″) angular resolution, NIKA2 is providing an unprecedented view of the millimetre Universe., With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)

Published
2020

40. New push-pull dyes based on 2-(3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-ylidene)malononitrile: An amine-directed synthesis

Author

Sébastien Péralta, Guillaume Noirbent, Sylvain Duval, Frédéric Dumur, Pierre-Henri Aubert, Thanh-Tuan Bui, Malek Nechab, Corentin Pigot, Didier Gigmes, Institut de Chimie Radicalaire (ICR), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ANR-17-CE08-0010,DUALITY,Elaboration de réseaux covalents bidimensionnels nanoporeux dirigés par la surface(2017), ANR-17-CE08-0054,VISICAT,Nouveaux Photocatalyseurs Redox pour la Synthèse sous Lumière Visible de Réseaux Polymères Interpénétrés(2017), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), and CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY)

Subjects
chemistry.chemical_classification, Process Chemistry and Technology, General Chemical Engineering, Aromatization, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Aldehyde, Medicinal chemistry, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Nucleophile, [CHIM]Chemical Sciences, Knoevenagel condensation, Amine gas treating, Piperidine, 0210 nano-technology, Derivative (chemistry), ComputingMilieux_MISCELLANEOUS, Malononitrile
Abstract

International audience; A series of twelve dyes have been designed using 2-(3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-yli-dene)malononitrile as the electron acceptor. While using piperidine as a classical base for the Knoevenagel reaction , a nucleophilic attack of the amine on the formed push-pull chromophore occurred, producing an azaflu-orenone derivative. By varying the amine, a series of azafluorenones could be obtained. By using an aldehyde of extended conjugation, a spontaneous aromatization following the cyclization reaction could also be demonstrated. The optical, electrochemical properties of the different dyes were examined. Theoretical calculations were also carried out to support the experimental results.

Published
2020

41. Cross-linked polyurethane as solid-solid phase change material for low temperature thermal energy storage

Author

Béatrice Ledésert, Thibault Harle, Giao T. M. Nguyen, Yannick Mélinge, Ronan Hébert, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), and Laboratoire de mécanique et matériaux du génie civil (L2MGC)

Subjects
Thermogravimetric analysis, Materials science, Crystallization of polymers, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Thermal energy storage, 01 natural sciences, 7. Clean energy, Phase-change material, 010406 physical chemistry, 0104 chemical sciences, chemistry.chemical_compound, Differential scanning calorimetry, chemistry, Chemical engineering, 13. Climate action, [CHIM]Chemical Sciences, Hexamethylene diisocyanate, Physical and Theoretical Chemistry, 0210 nano-technology, Instrumentation, Ethylene glycol, Polyurethane
Abstract

In this study polyurethanes (PU) are considered as solid-solid phase change material (s-s PCM) for thermal energy storage. Linear PU (PUL) and cross-linked PU (PUX) are synthesized using hexamethylene diisocyanate (HMDI), poly(ethylene glycol) (PEG) and glycerol as cross-linker. The synthesis has been carried out with no solvent or catalyst, these conditions are especially appreciated for environmental and health reasons. PEG with different molecular weights were investigated: 1000 g·mol−1, 1500 g·mol−1 and 2000 g·mol−1. The crystallization of polymers is observed by polarized optic microscopy (POM). The thermal behaviour of the s-s PCM has been investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The effect of PEG’s molecular weight on thermal properties of s-s PCM has been investigated, as well as the effect of reactive stoichiometry and that of the cross-linker content. By varying the different parameters a range of s-s PCM with different properties are synthesized. The temperature transitions were found between 21 °C and 33 °C, and the latent heat between 76 J/g and 103 J/g, depending on the parameters. The hardness of PUX reaches 30 on shore D scale. This feature allows the reduction of the s-s PCM into powder which can be a very interesting property in order to incorporate PCM into various composite materials for thermal energy storage purposes.

Published
2020

42. A hyper luminous starburst at z = 4.72 magnified by a lensing galaxy pair at z = 1.48

Author

Roberto J. Assef, Andrew J. Baker, Laura Ferrarese, Johannes Zabl, Alexandre Beelen, Raphael Gobat, C. Yang, Olivier Ilbert, Laure Ciesla, Mark Sargent, P. Côté, Morgan Fraser, Benoît Epinat, Manuel Aravena, Denis Burgarella, Corentin Schreiber, Vassilis Charmandaris, Médéric Boquien, Tanio Díaz-Santos, E. Daddi, David Elbaz, Johan Richard, Alessandro Boselli, Matthieu Béthermin, Frédéric Bournaud, Tao Wang, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Universidad Diego Portales [Santiago] (UDP), Astronomy Centre, University of Sussex, Universidad de Antofagasta, Tokyo University of Science [Tokyo], University of Oxford, European Southern Observatory (ESO), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Institute for Space Applications and Remote Sensing (ISARS/NOA), National Observatory of Athens (NOA), Pontificia Universidad Católica de Valparaíso (PUCV), Based on observations carried out under project number P319809 with the IRAM NOEMA Interferometer and project numbers 234-14 and D07-15 with the 30-m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). We would like to thank the IRAM staff for their support during the NIKA campaign. MF is supported by a Royal Society – Science Foundation Ireland University research fellowship. RJA was supported by FONDECYT grant number 1191124. MB acknowledges the FONDECYT regular grant 1170618. AJB acknowledges support from the National Science Foundation via grant AST-0955810. CY acknowledges support from an ESO Fellowship., Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), University of Oxford [Oxford], École normale supérieure - Paris (ENS Paris), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), National Observatory of Athens, and Institute for Space Applications and Remote Sensing

Subjects
submillimeter: galaxies, FOS: Physical sciences, galaxies: starburst, Astrophysics, 01 natural sciences, Spectral line, Einstein radius, Luminosity, galaxies: high-redshift, 0103 physical sciences, 010303 astronomy & astrophysics, Line (formation), Physics, 010308 nuclear & particles physics, Star formation, Astronomy and Astrophysics, Virgo Cluster, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, Space and Planetary Science, [SDU]Sciences of the Universe [physics], galaxies: star formation, Astrophysics of Galaxies (astro-ph.GA), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], galaxies: ISM
Abstract

[Abridged] We discovered in the Herschel Reference Survey an extremely bright IR source with $S_{500}$~120mJy (Red Virgo 4 - RV4). Based on IRAM/EMIR and IRAM/NOEMA detections of the CO(5-4), CO(4-3), and [CI] lines, RV4 is located at z=4.724, yielding a total observed L$_{IR}$ of 1.1+/-0.6x0$^{14}$L$_{\odot}$. At the position of the Herschel emission, three blobs are detected with the VLA at 10cm. The CO(5-4) line detection of each blob confirms that they are at the same redshift with the same line width, indicating that they are multiple images of the same source. In Spitzer and deep optical observations, two sources, High-z Lens 1 (HL1) West and HL1 East, are detected at the center of the three VLA/NOEMA blobs. These two sources are placed at z=1.48 with XSHOOTER spectra, suggesting that they could be merging and gravitationally lensing the emission of RV4. HL1 is the second most distant lens known to date in strong lensing systems. The Einstein radius of the lensing system is 2.2"+/-0.2 (20kpc). The high redshift of HL1 and the large Einstein radius are highly unusual for a strong lensing system. We present the ISM properties of the background source RV4. Different estimates of the gas depletion time yield low values suggesting that RV4 is a SB galaxy. Among all high-z SMGs, this source exhibits one of the lowest L$_{[CI]}$ to L$_{IR}$ ratios, 3.2+/-0.9x10$^{-6}$, suggesting an extremely short gas tdepl of only 14+/-5Myr. It also shows a relatively high L$_{[CI]}$ to L$_{CO(4-3)}$ ratio (0.7+/-0.2) and low L$_{CO(5-4)}$ to L$_{IR}$ ratio (only ~50% of the value expected for normal galaxies) hinting a low density of gas. Finally, we discuss that the short tdepl of RV4 can be explained by either a very high SFE, which is difficult to reconcile with major mergers simulations of high-z galaxies, or a rapid decrease of SF, which would bias the estimate of tdepl toward low value., Comment: 14 pages, 15 figures, accepted for publication in A&A

Published
2020

43. Eumitrins C-E: Structurally diverse xanthone dimers from the vietnamese lichen Usnea baileyi

Author

Pierre Le Pogam, Grégory Genta-Jouve, Solenn Ferron, Joël Boustie, Mehdi A. Beniddir, Van-Kieu Nguyen, Philippe Grellier, Warinthorn Chavasiri, Jean-François Gallard, Elisabeth Mouray, Thuc-Huy Duong, Chulalongkorn University [Bangkok], Laboratoire Ecologie, Evolution, Interactions des Systèmes amazoniens (LEEISA), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Guyane (UG)-Centre National de la Recherche Scientifique (CNRS), Hétérocycles et Peptides (UMR 8638), Chimie Organique, Médicinale et Extractive et Toxicologie Expérimentale (COMETE - UMR 8638), Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Vietnam National University - Ho Chi Minh City (VNU-HCM), Biomolécules : Conception, Isolement, Synthèse (BioCIS), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Institut de Chimie des Substances Naturelles (ICSN), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Molécules de Communication et Adaptation des Micro-organismes (MCAM), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), Equipe C-TAC (UMR 8638), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Graduate School, University of Texas, Austin, Chulalongkorn University, Université Paris-Sud - Paris 11 (UP11)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Rennes-Université de Rennes 1 (UR1), and Université de Rennes (UNIV-RENNES)

Subjects
Circular dichroism, Magnetic Resonance Spectroscopy, Antiparasitic, medicine.drug_class, Stereochemistry, Xanthones, MESH: Molecular Structure, MESH: Plant Extracts, MESH: Usnea, [CHIM.THER]Chemical Sciences/Medicinal Chemistry, 01 natural sciences, MESH: Circular Dichroism, chemistry.chemical_compound, Drug Discovery, Xanthone, medicine, [CHIM]Chemical Sciences, [SDV.MP.MYC]Life Sciences [q-bio]/Microbiology and Parasitology/Mycology, Pharmacology, Molecular Structure, Plant Extracts, 010405 organic chemistry, Depsidone, MESH: Magnetic Resonance Spectroscopy, Circular Dichroism, MESH: Xanthones, Absolute configuration, General Medicine, Nuclear magnetic resonance spectroscopy, 0104 chemical sciences, Thallus, 010404 medicinal & biomolecular chemistry, Usnea, Vietnam, chemistry, MESH: Vietnam, Two-dimensional nuclear magnetic resonance spectroscopy
Abstract

International audience; Three new xanthone dimers, eumitrins C - E (1-3), along with a new depsidone, 3'-O-demethylcryptostictinolide (4) were isolated from the acetone extract of the whole thallus of the lichen Usnea baileyi collected in Vietnam. Their structures were unambiguously established by spectroscopic analyses (HRESIMS, 1D and 2D NMR), as well as comparison to literature data. The absolute configurations of 1-3 were elucidated through electronic circular dichroism (ECD) analyses. The absolute configuration of 2 was validated by comparison between experimental and TDDFT-calculated ECD spectra while that of 3 was based on DFT-NMR calculations and subsequent DP4 probability score. The antiparasitic activities against Plasmodium falciparum as well as the cytotoxic activity against seven cell lines were determined for the new compounds 1-3, and led from null to mild bioactivities.

Published
2020

44. Extension modes and breakup processes of the southeast China-Northwest Palawan conjugate rifted margins

Author

Manuel Pubellier, Michael Nirrengarten, Jean-Claude Ringenbach, H.C. Larsen, Frank Despinois, François Sapin, Geoffroy Mohn, Nick Kusznir, Sung-Ping Chang, Université de Cergy Pontoise (UCP), Université Paris-Seine, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Centre scientifique et Technique Jean Feger (CSTJF), TOTAL FINA ELF, Laboratoire de géologie de l'ENS (LGENS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), and TOTAL-Scientific and Technical Center Jean Féger (CSTJF)

Subjects
010504 meteorology & atmospheric sciences, Stratigraphy, 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Gravity anomaly, 14. Life underwater, Petrology, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, geography, Rift, geography.geographical_feature_category, Continental crust, Geology, Crust, Mid-ocean ridge, Seafloor spreading, Geophysics, Basement (geology), 13. Climate action, [SDU]Sciences of the Universe [physics], Magmatism, Economic Geology
Abstract

Our understanding of continent-ocean transition structures and magmatism in the absence of excessive magmatic additions has been guided by the observations and models developed at the magma-poor Iberia-Newfoundland conjugate margins. Recently these models have been challenged in the South China Sea in light of new IODP Expeditions 367-368-368X. We have used an integrated analysis of high quality seismic reflection and gravity anomaly data, calibrated against recent deep sea drilling results, to investigate margin structure and tectono-magmatic interplay during continental breakup and early seafloor spreading between the SE China-NW Palawan conjugate margins. The Eocene-Oligocene South China Sea rifting initiates in a heterogeneous and likely thermally un-equilibrated lithosphere formed by the Mesozoic Yenshanian orogeny. Gravity and joint inversion methods confirm lateral variation of basement densities across the conjugate margins. Lithospheric and basement heterogeneities induced a rifting style characterized by a series of highly thinned rift basins associated with extensional faulting soling out at various crustal levels. Final rifting in late Eocene triggered decompression melting forming mid-ocean ridge type magmatism, which emplaced within thinned continental crust as deep intrusions and shallow extrusive rocks. This initial magmatic activity was concomitant with continued deformation of continental crust by extensional faulting. Integrated analysis of seismic reflection profiles and gravity anomaly data combined with deep-sea boreholes accurately locate the continent-ocean boundary. We show that the initial igneous crust, continentward of oceanic magnetic anomaly C10n, is asymmetric in width and in morphology for the conjugate margins. The wider and faulted newly accreted domain on the SE China side indicates that magmatic accretion is associated with tectonic faulting during the formation of initial oceanic lithosphere. We suggest that deformation was not symmetrically distributed between the conjugate margins during the initiation of seafloor spreading but evolved asymmetrically until the stabilisation of the spreading ocean ridge around C10n. The analysis of the South China Sea breakup reveals a transient interplay between faulting, magmatic budget and extension rates during the formation of the continent-ocean transition and initial emplacement of igneous crust.

Published
2020

45. Polyol-Made Luminescent and Superparamagnetic β-NaY0.8Eu0.2F4@γ-Fe2O3 Core-Satellites Nanoparticles for Dual Magnetic Resonance and Optical Imaging

Author

TAHAR, Lotfi Ben, HAIDAR, Darine Abi, BOISSIERE, Michel, MNASRI, Walid, BEN TAHAR, Lotfi, BEAUNIER, Patricia, BOISSIÈRE, Michel, SANDRE, Olivier, AMMAR, Souad, Faculté des Sciences de Bizerte, Université de Carthage, Tunisia, Northern Border University, Arar, Saudi Arabia, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique (LMCCCO), Université Montpellier 1 (UM1)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS), Université de Cergy Pontoise (UCP), Université Paris-Seine, Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS (UMR_7086)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Unité de Recherche UR11ES30 de Synthèse et Structures de Nanomatériaux, Faculté des Sciences de Bizerte, Laboratoire de Réactivité de Surface (LRS), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Sorbonne Université (SU), Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Laboratoire de Chimie des Polymères Organiques (LCPO), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), TEAM 3 LCPO, Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS), Funding by the French state and the Nouvelle Aquitaine region through the CPER CAMPUSB project is acknowledged for acquiring the BrukerMinispec™ mq60 relaxometer, ANR-11-LABX-086 - ANR-11-IDEX-05-02,LabEx SEAM,Science and Engineering for Advanced Materials and devices, ANR-11-IDEX-0005-02/11-IDEX-0005,USPC,USPC(2011), ANR-11-INBS-0006/11-INBS-0006,FLI,France In vivo Imaging(2011), Faculté des Sciences de Bizerte [Université de Carthage], Université de Carthage - University of Carthage, Université Paris Diderot - Paris 7 (UPD7)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Carthage - University of Carthage-Université de Carthage - University of Carthage, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Team 3 LCPO : Polymer Self-Assembly & Life Sciences, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), ANR-10-LABX-0096,SEAM,Science and Engineering for Advanced Materials and devices(2010), ANR-11-IDEX-0005,USPC,Université Sorbonne Paris Cité(2011), and ANR-11-INBS-0006,FLI,France Life Imaging(2011)

Subjects
Materials science, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, General Chemical Engineering, Nanoparticle, 02 engineering and technology, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 01 natural sciences, 7. Clean energy, europium-doped fluoride nanocrystals, lcsh:Chemistry, chemistry.chemical_compound, Colloid, General Materials Science, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials, polyol process, human foreskin fibroblast cell viability, dual superparamagnetic and luminescent nanoprobes, iron oxide nanoparticles, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Magnetostatics, 0104 chemical sciences, 3. Good health, chemistry, lcsh:QD1-999, Physical chemistry, Crystallite, 0210 nano-technology, Luminescence, Single crystal, Iron oxide nanoparticles, Superparamagnetism
Abstract

Red luminescent and superparamagnetic &beta, NaY0.8Eu0.2F4@&gamma, Fe2O3 nanoparticles, made of a 70 nm-sized &beta, NaY0.8Eu0.2F4 single crystal core decorated by a 10 nm-thick polycrystalline and discontinuous &gamma, Fe2O3 shell, have been synthesized by the polyol process. Functionalized with citrate ligands they show a good colloidal stability in water making them valuable for dual magnetic resonance and optical imaging or image-guided therapy. They exhibit a relatively high transverse relaxivity r2 = 42.3 mM&minus, 1&middot, s&minus, 1 in water at 37 &deg, C, for an applied static magnetic field of 1.41 T, close to the field of 1.5 T applied in clinics, as they exhibit a red emission by two-photon excited fluorescence microscopy. Finally, when brought into contact with healthy human foreskin fibroblast cells (BJH), for doses as high as 50 &micro, g&middot, mL&minus, 1 and incubation time as long as 72 h, they do not show evidence of any accurate cytotoxicity, highlighting their biomedical applicative potential.

Published
2020
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46. The thermal imprint of continental breakup during the formation of the South China Sea

Author

Geoffroy Mohn, Michael Nirrengarten, Laura Gutiérrez-García, Andrea Schito, Frank Despinois, Stephen A. Bowden, Sveva Corrado, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Université Paris-Seine, Università degli Studi Roma Tre, Nirrengarten, M., Mohn, G., Schito, A., Corrado, S., Gutierrez-Garcia, L., Bowden, S. A., and Despinois, F.

Subjects
IODP 367-368, 010504 meteorology & atmospheric sciences, Geochemistry, SE China Margin, 010502 geochemistry & geophysics, 01 natural sciences, Sedimentary depositional environment, Geochemistry and Petrology, Lithosphere, Earth and Planetary Sciences (miscellaneous), Sedimentary organic matter, 14. Life underwater, thermal evolution, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, geography, geography.geographical_feature_category, Sedimentary basin, International Ocean Discovery Program, Seafloor spreading, Geophysics, 13. Climate action, Space and Planetary Science, Magmatism, Upwelling, continental breakup, Geology
Abstract

The stretching of continental lithosphere results in asthenospheric upwelling, raising of isotherms, melting during decompression and eventually seafloor spreading. The thermal maturity of overlying sedimentary organic matter from these settings would be expected to be distinctly altered by these processes, however this is still poorly constrained and quantitatively unexplored. International Ocean Discovery Program (IODP) Expeditions 367–368 cored sediments at the Continent Ocean Transition (COT) on the Northern Margin of the South China Sea (SCS). From two settings at the South East China COT we measured and modelled thermal maturity in pre-/syn- to post-rift sediments making use of a range of thermal maturity parameters. Various heat-flow evolutionary scenarios were investigated, with notable jumps in thermal maturity for sediments corresponding to different depositional packages. In order to match observations of thermal maturity, it was found that the deeper and likely pre-rift sediments were heated to temperatures as high as 200 °C during initial breakup. Achieving this temperature for the deeper sediments requires that significant additional heat be imparted at shallow depths (e.g. exposure to at least the far-field effects of a magmatic intrusion or subsurface expressions of volcanism). The post-rift sediments have lower thermal maturities which are likely due to limited burial and the absence of late post-rift magmatism. The comparison of the SE China COT with other margin examples highlights some parameters controlling the thermal evolution and its record.

Published
2020

47. High diversity of fungi associated with altered wood materials in the hunting lodge of 'La Muette', Saint-Germain-en-Laye, France

Author

P. Di Martino, A. Slimen, S. Moularat, Agnès Mihajlovski, R. Barboux, J. Leplat, Faisl Bousta, Equipe de recherche sur les relations matrice extracellulaire-cellules (ERRMECe), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine

Subjects
Mucor, 0303 health sciences, biology, Ascomycota, Acremonium, [SDV]Life Sciences [q-bio], Basidiomycota, biology.organism_classification, Agricultural and Biological Sciences (miscellaneous), 030308 mycology & parasitology, Coprinellus, 03 medical and health sciences, Botany, Penicillium, Ecology, Evolution, Behavior and Systematics, Serpula lacrymans, ComputingMilieux_MISCELLANEOUS, 030304 developmental biology, Cladosporium
Abstract

“La Muette” is an eighteenth-century hunting lodge located in the forest of Saint-Germain-en-Laye, France. This study consisted in the implementation of multidisciplinary analytical tools to characterize the fungal biocontamination of woods inside the monument. The fungal colonization was first mapped by macroscopic visual observation of all the rooms. Brown rot and white rot present in different rooms and fruiting bodies of Serpula lacrymans were observed on the first and second floors in localized areas. At the same time, air sampling was carried out, and the volatile organic compounds (VOCs) specific to the activity of fungi were analysed by gas chromatography. The analysis of the VOCs confirmed the presence of active developments of moulds and S. lacrymans in the pavilion. Wood samples were collected from areas with visible fungal colonization and subjected to culturing, extraction of DNA and analysis of the ITS sequences after PCR amplification. Culturing and microscopic observation revealed the presence of several moulds: Penicillium sp., Cladosporium sp., Acremonium sp., Humicola sp., Rhizopus sp. and Mucor sp. Isolates not identified by this approach were identified by analysing ITS sequences as Trichoderma atroviride, Engyodontium album and Umbelopsis isabellina. The presence of additional Ascomycota (Acremonium charticola, Aspergillus conicus, Chaetomium elatum, Lecanicillium sp.) and of the Basidiomycota Coprinellus aff. radians was revealed after DNA extraction, amplification and analysis of ITS sequences directly on wood samples. In conclusion, a high fungal diversity including moulds, S. lacrymans and C. aff. radians was demonstrated in association with altered wood in the monument.

Published
2020

48. High energy ultracapacitor electrodes based on conventional and nitrogen doped vertically aligned carbon nanotubes

Author

Querné, Corentin, Banet, Philippe, Vignal, Thomas, Mayne-L'Hermite, Martine, Aubert, Pierre-Henri, Pinault, Mathieu, Laboratoire Edifices Nanométriques (LEDNA), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire de Physico-chimie des Polymères et des Interfaces (LPPI), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Nawatechnologies, Palacin, Serge, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

International audience; The Aerosol Assisted Catalytic Chemical Vapor Deposition method allows the controlled growth of Vertically Aligned Carbon Nanotubes carpets (VACNT) on conductive substrates[1][2]. This process has been optimized for the growth of dense VACNT at low temperature (580 to 615°C) on aluminium foils, leading to a single-step process that meets industrial requirements to the development of low cost, highly conducting and light ultracapacitor electrodes[3]. VACNT can be used as a support for deposition of pseudocapacitive materials such as electronic conducting polymer (ECP). An electrodeposition of poly(3-methylthiophene) on VACNT was developed to improve the capacitance[4]. Homogenous deposition of ECP was achieved all along the carpet by pulsed chronoamperometry. To keep improving performances, our approach consists in modifying the properties of the VACNT by doping the carbon nanotubes with heteroatoms. Nitrogen doping should provide opportunities to increase the capacitance owing to the oxidation of the nitrogen sites and also the specific surface, in similar conditions of densities and diameters, because of their bamboo shape[5]. The wettability and electric conductivity should be improved by the doping[6][7]. The growth of nitrogen doped VACNT was achieved at 850°C on Si substrates by using ethylenediamine as N and C source. Such carpets exhibit a density of 4.10$^{10}$ NTC/cm$^2$ of few walled nanotubes and a N content of 4.5% at (XPS). Their storage capacity will be presented

Published
2020

49. Desorption of neutrals, cations, and anions from core-excited amorphous solid water

Author

Jean-Hugues Fillion, Xavier Michaut, Roberto Cimino, Géraldine Féraud, Mathieu Bertin, Laurent Philippe, T. Putaud, Vincent Baglin, Rémi Dupuy, Claire Romanzin, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Laboratoire de Chimie Physique D'Orsay (LCPO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratori Nazionali di Frascati (LNF), National Institute for Nuclear Physics (INFN), European Organization for Nuclear Research (CERN), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), and Istituto Nazionale di Fisica Nucleare (INFN)

Subjects
Chemical Physics (physics.chem-ph), 010304 chemical physics, Chemistry, physics.chem-ph, General Physics and Astronomy, FOS: Physical sciences, 010402 general chemistry, Photochemistry, 01 natural sciences, Secondary electrons, Dissociation (chemistry), 0104 chemical sciences, Ion, Amorphous solid, Desorption, Excited state, Physics - Chemical Physics, 0103 physical sciences, Molecule, Irradiation, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Physical and Theoretical Chemistry, Chemical Physics and Chemistry
Abstract

Core-excitation of water ice releases many different molecules and ions in the gas phase. Studying these desorbed species and the underlying mechanisms can provide useful information on the effects of X-ray irradiation in ice. We report a detailed study of the X-ray induced desorption of a number of neutral, cationic and anionic species from amorphous solid water. We discuss the desorption mechanisms, and the relative contributions of Auger and secondary electrons (X-ray induced Electron Stimulated Desorption) and initial excitation (\rev{direct desorption}) as well as the role of photochemistry. Anions are shown to desorb not just through processes linked with secondary electrons but also through direct dissociation of the core-excited molecule. The desorption spectra of oxygen ions (O$^+$, OH$^+$, H$_2$O$^+$, O$^-$, OH$^-$) give a new perspective on their previously reported very low desorption yields for most types of irradiation of water, showing that they mostly originate from the dissociation of photoproducts such as H$_2$O$_2$., Comment: Accepted in Journal of Chemical Physics

Published
2020

50. Lateral evolution of the rift-to-drift transition in the South China Sea: Evidence from multi-channel seismic data and IODP Expeditions 367&368 drilling results

Author

Weiwei Ding, Gianreto Manatschal, Zhen Sun, Geoffroy Mohn, Michael Nirrengarten, Julie Tugend, Jiabiao Li, Second Institute of Oceanography, Shanghai Jiao Tong University [Shanghai], South China Sea Institute of Oceanology, Chinese Academy of Sciences [Beijing] (CAS), Université de Cergy Pontoise (UCP), Université Paris-Seine, Laboratoire Géosciences et Environnement Cergy (GEC), Fédération INSTITUT DES MATÉRIAUX DE CERGY-PONTOISE (I-MAT), CY Cergy Paris Université (CY)-CY Cergy Paris Université (CY), Institut des Sciences de la Terre de Paris (iSTeP), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS), Dynamique de la lithosphère et des bassins sédimentaires (IPGS) (IPGS-Dylbas), Institut de physique du globe de Strasbourg (IPGS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Chinese Academy of Sciences [Beijing] (UCAS), Université Paris-Seine-Université Paris-Seine-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine, Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut de Mathématiques de Marseille (I2M), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), and State Oceanic Administration (SOA)

Subjects
tectono-magmatic processes, 010504 meteorology & atmospheric sciences, South China Sea, breakup, 010502 geochemistry & geophysics, 01 natural sciences, Mantle (geology), Paleontology, Continental margin, Geochemistry and Petrology, Asthenosphere, Transition zone, Earth and Planetary Sciences (miscellaneous), IODP Expedition 367&368, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, South China SeaI, [SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics, Rift, Continental crust, rift-to-drift transition, Breakup, Seafloor spreading, ODP Expedition 367&368, Geophysics, 13. Climate action, Space and Planetary Science, Geology
Abstract

International audience; The South China Sea margins represent a critical natural laboratory to study the processes and parameters controlling the rift-to-drift transition. High quality seismic data previously suggested the occurrence of a relatively sharp transition between the continental and oceanic domains, a hypothesis recently validated by the results of the IODP Expedition 367&368 drilled in the northern South China Sea distal margin. Drilling results in this transition cored Mid-Ocean Ridge type basaltic basement (Site U1502), while its lateral equivalent showed continental affinities (Site U1499). Seismic data document the lateral evolution of this narrow transition zone (∼15 to 25 km wide) and tectono-magmatic context related to breakup. A short-period magmatic event occurred during the latest stage of continental rifting and intruded the edge of the thinned continental crust, triggering crustal breakup and onset of steady-state seafloor spreading. The architecture of the transitional domain documented in this work is in marked contrast with those interpreted as either magma-starved or magma-rich at breakup time, suggesting that the continental margin of the SCS is intermediate between the classical end-member magmatic archetypes. We propose that the magmatic event triggering continental breakup is related to decompression melting linked to the ascending asthenosphere. It is assumed that this event was rapid at geological time scale (

Published
2020

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