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488 results on '"Martino D."'

1. Discovery of Persistent Quasi-Periodic Oscillations in Accreting White Dwarfs: A New Link to X-ray Binaries

Author

Veresvarska, M., Scaringi, S., Knigge, C., Paice, J., Buckley, D. A. H., Segura, N. Castro, de Martino, D., Groot, P. J., Ingram, A., Irving, Z. A., and Szkody, P.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

Almost all accreting black hole and neutron star X-ray binary systems (XRBs) exhibit prominent brightness variations on a few characteristic time-scales and their harmonics. These quasi-periodic oscillations (QPOs) are thought to be associated with the precession of a warped accretion disc, but the physical mechanism that generates the precessing warp remains uncertain. Relativistic frame dragging (Lense-Thirring precession) is one promising candidate, but a misaligned magnetic field is an alternative, especially for neutron star XRBs. Here, we report the discovery of 5 accreting white dwarf systems (AWDs) that display strong optical QPOs with characteristic frequencies and harmonic structures that suggest they are the counterpart of the QPOs seen in XRBs. Since AWDs are firmly in the classical (non-relativistic) regime, Lense-Thirring precession cannot account for these QPOs. By contrast, a weak magnetic field associated with the white dwarf can drive disc warping and precession in these systems, similar to what has been proposed for neutron star XRBs. Our observations confirm that magnetically driven warping is a viable mechanism for generating QPOs in disc-accreting astrophysical systems, certainly in AWDs and possibly also in (neutron star) XRBs. Additionally, they establish a new way to estimate magnetic field strengths, even in relatively weak-field systems where other methods are not available., Comment: 16 pages, 9 figures, accepted for publication in MNRAS more...

Published
2024
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2. The Peculiar Bursting Nature of CP Pup

Author

Veresvarska, M., Scaringi, S., Hagen, S., De Martino, D., Done, C., Ilkiewicz, K., Knigge, C., and Littlefield, C.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

The classical nova CP Puppis has been observed to have particularly puzzling and peculiar properties. In particular, this classical nova displays occasional bursts in its long-term ASAS-SN light curve. Here we report on 5 sectors of TESS data displaying 2 of these rapid bursts, lasting ~1 day. Based on the estimated lower energy limits of the bursts we discuss whether the bursts may be examples of micronovae resulting from localised thermonuclear explosion. Furthermore, its orbital period remains uncertain, with several inconsistent periodic signals appearing in spectroscopic and photometric observations at various wavelengths. Although we cannot unambiguously unravel the physical origin of the signals, the previously suggested nature of CP Puppis as a long orbital period system may be a viable explanation. The recurrence time of the bursts in CP Puppis, together with the unexplained variable modulations make it a prime candidate for intense monitoring., Comment: 9 pages, 5 figures, accepted for publication in MNRAS more...

Published
2024
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3. Extreme climatic events, biotic interactions and species-specific responses drive tree crown defoliation and mortality in Italian forests

Author

Bussotti F, Papitto G, Di Martino D, Cocciufa C, Cindolo C, Cenni E, Bettini D, Iacopetti G, Ghelardini L, Moricca S, Panzavolta T, Bracalini M, and Pollastrini M

Subjects
Climate Change, Crown Defoliation, Emerging Forest Diseases, Forest Health Monitoring, Heatwaves and Droughts, ICP Forests, Forestry, SD1-669.5
Abstract

The frequency of forest disturbances has increased in recent years, provoking widespread defoliation, crown dieback and tree mortality. The ICP Forests monitoring network offers a unique platform for observing the impacts on forests of heatwaves, droughts and other extreme climatic events, as well as the trends of defoliation and mortality. The Italian ICP Forests Level I network consists of 261 permanent plots where tree crown defoliation and damage symptoms are assessed visually each year by well-trained crews of the Corpo Forestale dello Stato (2001-2016) and the Carabinieri Forestale from 2017 onward. This paper aims to assess the main tree species’ responses, in terms of defoliation and mortality, to severe climatic events. The results are discussed in relation to species-specific physiological behaviour and bioclimatic regions. A significant trend toward increasing defoliation and mortality has been observed since 2010 in both conifers and broadleaves. Conifers (especially Picea abies), which are largely diffuse in the Alpine regions, have suffered from bark beetle outbreaks due to severe windstorms (such as Vaia in 2018) and recurrent dry years. In the temperate regions, characterised by deciduous broadleaved trees, the most relevant defoliation events coincided with the driest and hottest years, with low relative humidity (2012, 2017 and 2021-2022), only partially recovering in the subsequent years. Among them, Fagus sylvatica and Quercus cerris, along with increased defoliation, showed symptoms caused by fungi of the genus Biscogniauxia, causal agents of “charcoal canker”, in less favourable site conditions. Quercus pubescens was the most resilient species, able to restore its crown after defoliation. The Mediterranean forests, with evergreen broadleaved species, showed no significant trends but were impacted at the most drought-prone coastal sites. The findings evidenced that the current ICP Forests network in Italy represents a fundamental infrastructure for monitoring impacts and trends connected to climate change and species-specific responses. A local intensification of the grid would help to capture under-represented species or ecological conditions. more...

Published
2024
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4. A long-period radio transient active for three decades

Author

Hurley-Walker, N., Rea, N., McSweeney, S. J., Meyers, B. W., Lenc, E., Heywood, I., Hyman, S. D., Men, Y. P., Clarke, T. E., Coti Zelati, F., Price, D. C., Horváth, C., Galvin, T. J., Anderson, G. E., Bahramian, A., Barr, E. D., Bhat, N. D. R., Caleb, M., Dall’Ora, M., de Martino, D., Giacintucci, S., Morgan, J. S., Rajwade, K. M., Stappers, B., and Williams, A. more...

Published
2023
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5. The new INFN-CHNet neutron imaging facility

Author

Gelli, N., Giuntini, L., Cantini, F., Sans-Planell, O., Magalini, M., Manetti, M., Sodi, L., Massi, M., Castelli, L., Czelusniak, C., Taccetti, F., Bella, T.E., Marcucci, G., Clemenza, M., Di Martino, D., Morigi, M., Bettuzzi, M., Vigorelli, L., Re, A., Lo Giudice, A., Alloni, D., Prata, M., Altieri, S., Salvini, A., and Grazzi, F. more...

Published
2023
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7. Are the conditions of the Italian forests worsening due to extreme climatic events? Evidence from the national monitoring networks ICP Forests - CON. ECO.FOR.

Author

Bussotti F, Papitto G, Di Martino D, Cocciufa C, Cindolo C, Cenni E, Bettini D, Iacopetti G, and Pollastrini M

Subjects
defoliation, drought, forest health monitoring, heat waves, icp forests, tree mortality, Forestry, SD1-669.5
Abstract

Tree defoliation and mortality are triggered in Europe by extreme climatic events that are recurring since the beginning of XXI century. Data from the ICP Forests monitoring networks reveal a general worsening of tree conditions in the last ten years, as consequence of the drought and heat waves that affected the Southern (2017) and Central Europe (2018-2019). In Italy a significant increase of defoliation and tree mortality, assessed on the extensive (Level I) monitoring network, was observed after the 2017 dry summer, which impacted mainly the broadleaved forests (beech and oak forests) in the peninsular regions. Coniferous forests of the alpine belt were severely impacted in 2021, probably because of the co-occurrence of multiple causes, involving windstorm and bark beetle attacks. Chestnut forests suffer from pest (insect and pathogen) attacks. The intensive (Level II) monitoring network provides cases of study and allows to carry out specific cause-effect studies concerning the physiological effects on the environmental impacts, as well to observe the ecological processes following the disturbing events. Defoliation caused by drought or pest attacks induces the loss of physiological defenses (namely non-structural carbohydrates), that need several years to be restored. Then, the occurrence of more frequent and repeated heat and drought waves can produce irreversible effects. In this view, the long-term forest health monitoring is key to detect the extent and direction of changes in forest structure and composition, and represents an important tool for forest conservation and management. more...

Published
2022
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11. Time domain astronomy with the THESEUS satellite

Author

Mereghetti, S., Balman, S., Caballero-Garcia, M., Del Santo, M., Doroshenko, V., Erkut, M. H., Hanlon, L., Hoeflich, P., Markowitz, A., Osborne, J. P., Pian, E., Rivera Sandoval, L., Webb, N., Amati, L., Ambrosi, E., Beardmore, A. P., Blain, A., Bozzo, E., Burderi, L., Campana, S., Casella, P., D’Aí, A., D’Ammando, F., De Colle, F., Della Valle, M., De Martino, D., Di Salvo, T., Doyle, M., Esposito, P., Frontera, F., Gandhi, P., Ghisellini, G., Gotz, D., Grinberg, V., Guidorzi, C., Hudec, R., Iaria, R., Izzo, L., Jaisawal, G. K., Jonker, P.G., Kong, A. K. H., Krumpe, M., Kumar, P., Manousakis, A., Marino, A., Martin-Carrillo, A., Mignani, R., Miniutti, G., Mundell, C. G., Mukai, K., Nucita, A. A., O’Brien, P. T., Orlandini, M., Orio, M., Palazzi, E., Papitto, A., Pintore, F., Piranomonte, S., Porquet, D., Ricci, C., Riggio, A., Rigoselli, M., Rodriguez, J., Saha, T., Sanna, A., Santangelo, A., Saxton, R., Sidoli, L., Stiele, H., Tagliaferri, G., Tavecchio, F., Tiengo, A., Tsygankov, S., Turriziani, S., Wijnands, R., Zane, S., and Zhang, B. more...

Published
2021
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12. Discovery of persistent quasi-periodic oscillations in accreting white dwarfs: a new link to X-ray binaries.

Author

Veresvarska, M, Scaringi, S, Knigge, C, Paice, J, Buckley, D A H, Segura, N Castro, de Martino, D, Groot, P J, Ingram, A, Irving, Z A, and Szkody, P

Subjects
MAGNETIC flux density, X-ray binaries, ACCRETION disks, BLACK holes, MAGNETIC fields, WHITE dwarf stars
Abstract

Almost all accreting black hole and neutron star (NS) X-ray binary systems (XRBs) exhibit prominent brightness variations on a few characteristic time-scales and their harmonics. These quasi-periodic oscillations (QPOs) are thought to be associated with the precession of a warped accretion disc, but the physical mechanism that generates the precessing warp remains uncertain. Relativistic frame dragging (Lense–Thirring precession) is one promising candidate, but a misaligned magnetic field is an alternative, especially for NS XRBs. Here, we report the discovery of five accreting white dwarf systems (AWDs) that display strong optical QPOs with characteristic frequencies and harmonic structures that suggest they are the counterpart of the QPOs seen in XRBs. Since AWDs are firmly in the classical (non-relativistic) regime, Lense–Thirring precession cannot account for these QPOs. By contrast, a weak magnetic field associated with the white dwarf can drive disc warping and precession in these systems, similar to what has been proposed for NS XRBs. Our observations confirm that magnetically driven warping is a viable mechanism for generating QPOs in disc-accreting astrophysical systems, certainly in AWDs and possibly also in NS XRBs. Additionally, they establish a new way to estimate magnetic field strengths, even in relatively weak-field systems where other methods are not available. [ABSTRACT FROM AUTHOR] more...

Published
2024
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13. X-ray and optical observations of the millisecond pulsar binary PSR J1431–4715.

Author

de Martino, D., Phosrisom, A., Dhillon, V. S., Torres, D. F., Coti Zelati, F., Breton, R. P., Marsh, T. R., Miraval Zanon, A., Rea, N., and Papitto, A.

Subjects
*SYNCHROTRON radiation, *STELLAR winds, *NEUTRON stars, *X-ray spectra, *LIGHT curves, *BINARY pulsars
Abstract

We present the first X-ray observation of the energetic millisecond pulsar binary PSR J1431−4715, performed with XMM-Newton and complemented with fast optical multi-band photometry acquired with the ULTRACAM instrument at ESO-NTT. It is found as a faint X-ray source without a significant orbital modulation. This contrasts with the majority of systems that instead display substantial X-ray orbital variability. The X-ray spectrum is dominated by non-thermal emission and, due to the lack of orbital modulation, does not favour an origin in an intrabinary shock between the pulsar and companion star wind. While thermal emission from the neutron star polar cap cannot be excluded in the soft X-rays, the dominance of synchrotron emission favours an origin in the pulsar magnetosphere that we describe at both X-ray and gamma-ray energies with a synchro-curvature model. The optical multi-colour light curve folded at the 10.8 h orbital period is double-humped and dominated by ellipsoidal effects, but also affected by irradiation. The ULTRACAM light curves are fit with several models encompassing direct heating and a cold spot, or heat redistribution after irradiation either through convection or convection plus diffusion. Despite the inability to constrain the best irradiation models, the fits provide consistent system parameters, giving an orbital inclination of 59 ± 6° and a distance of 3.1 ± 0.3 kpc. The companion is found to be an F-type star, underfilling its Roche lobe (fRL = 73 ± 4%) with a mass of 0.20 ± 0.04 M⊙, confirming the redback status, but hotter than the majority of redbacks. The stellar dayside and nightside temperatures of 7500 K and 7400 K, respectively, indicate a weak irradiation effect on the companion, likely due to its high intrinsic luminosity. Although the pulsar mass cannot be precisely derived, a heavy (1.8−2.2 M⊙) neutron star is favoured. [ABSTRACT FROM AUTHOR] more...

Published
2024
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14. The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

Author

Papitto, A., Falanga, M., Hermsen, W., Mereghetti, S., Kuiper, L., Poutanen, J., Bozzo, E., Ambrosino, F., Coti Zelati, F., De Falco, V., de Martino, D., Di Salvo, T., Esposito, P., Ferrigno, C., Forot, M., Götz, D., Gouiffes, C., Iaria, R., Laurent, P., Li, J., Li, Z., Mineo, T., Moran, P., Neronov, A., Paizis, A., Rea, N., Riggio, A., Sanna, A., Savchenko, V., Słowikowska, A., Shearer, A., Tiengo, A., and Torres, D.F. more...

Published
2020
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16. Optical and ultraviolet pulsed emission from an accreting millisecond pulsar

Author

Ambrosino, F., Miraval Zanon, A., Papitto, A., Coti Zelati, F., Campana, S., D’Avanzo, P., Stella, L., Di Salvo, T., Burderi, L., Casella, P., Sanna, A., de Martino, D., Cadelano, M., Ghedina, A., Leone, F., Meddi, F., Cretaro, P., Baglio, M. C., Poretti, E., Mignani, R. P., Torres, D. F., Israel, G. L., Cecconi, M., Russell, D. M., Gonzalez Gomez, M. D., Riverol Rodriguez, A. L., Perez Ventura, H., Hernandez Diaz, M., San Juan, J. J., Bramich, D. M., and Lewis, F. more...

Published
2021
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17. Unveiling the redback nature of the low-mass X-ray binary XSSJ1227.0-4859 through optical observations

Author

de Martino, D., Casares, J., Mason, E., Buckley, D. A. H., Kotze, M. M., Bonnet-Bidaud, J. -M., Mouchet, M., Coppejans, R., and Gulbis, A. A. S.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

The peculiar low mass X-ray binary XSSJ12270-4859, associated with the Fermi/LAT source 2FGLJ1227.7-4853, was in a X-ray, gamma-ray and optical low-luminosity persistent state for about a decade until the end of 2012, when it has entered into the dimmest state ever observed. The nature of the compact object has been controversial until the detection of a 1.69ms radio pulsar early 2014. We present optical spectroscopy and optical/near-IR photometry during the previous brighter and in the recent faint states. We determine the first spectroscopic orbital ephemeris and an accurate orbital period of 6.91246(5)h. We infer a mid G-type donor star and a distance d=1.8-2.0kpc. The donor spectral type changes from G5V to F5V between inferior and superior conjunction, a signature of strong irradiation effects. We infer a binary inclination 45deg <~ i <~ 65deg and a highly undermassive donor, M_2 ~ 0.06-0.12M_sun for a neutron star mass in the range 1.4-3M_sun. Thus this binary joins as the seventh member the group of "redbacks". In the high state, the emission lines reveal the presence of an accretion disc. They tend to vanish at the donor star superior conjunction, where also flares are preferentially observed together with the occurrence of random dips. This behaviour could be related to the propeller mechanism of the neutron star recently proposed to be acting in this system during the high state. In the low state, the emission lines are absent at all orbital phases indicating that accretion has completely switched-off and that XSSJ12270-4859 has transited from an accretion-powered to a rotation-powered phase., Comment: 12 pages, 9 figures, 3 tables accepted for publication in Monthly Notices Royal Astronomical Society, Main Journal more...

Published
2014
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18. STREGA: STRucture and Evolution of the GAlaxy. I. Survey Overview and First Results

Author

Marconi, M., Musella, I., Di Criscienzo, M., Cignoni, M., Dall'Ora, M., Bono, G., Ripepi, V., Brocato, E., Raimondo, G., Grado, A., Limatola, L., Coppola, G., Moretti, M. I., Stetson, P. B., Calamida, A., Cantiello, M., Capaccioli, M., Cappellaro, E., Cioni, M. -R. L., Degl'Innocenti, S., De Martino, D., Di Cecco, A., Ferraro, I., Iannicola, G., Moroni, P. G. Prada, Silvotti, R., Buonanno, R., Getman, F., Napolitano, N. R., Pulone, L., and Schipani, P. more...

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

STREGA (STRucture and Evolution of the GAlaxy) is a Guaranteed Time survey being performed at the VST (the ESO VLT Survey Telescope) to map about 150 square degrees in the Galactic halo, in order to constrain the mechanisms of galactic formation and evolution. The survey is built as a five-year project, organized in two parts: a core program to explore the surrounding regions of selected stellar systems and a second complementary part to map the southern portion of the Fornax orbit and extend the observations of the core program. The adopted stellar tracers are mainly variable stars (RR~Lyraes and Long Period Variables) and Main Sequence Turn-off stars for which observations in the g,r,i bands are obtained. We present an overview of the survey and some preliminary results for three observing runs that have been completed. For the region centered on $\omega$~Cen (37 deg^2), covering about three tidal radii, we also discuss the detected stellar density radial profile and angular distribution, leading to the identification of extratidal cluster stars. We also conclude that the cluster tidal radius is about 1.2 deg, in agreement with values in the literature based on the Wilson model., Comment: Accepted for publication on MNRAS on 2014 August 18 more...

Published
2014
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22. Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout

Author

Acharyya, A., Agudo, I., Angüner, E.O., Alfaro, R., Alfaro, J., Alispach, C., Aloisio, R., Alves Batista, R., Amans, J.-P., Amati, L., Amato, E., Ambrosi, G., Antonelli, L.A., Aramo, C., Armstrong, T., Arqueros, F., Arrabito, L., Asano, K., Ashkar, H., Balazs, C., Balbo, M., Balmaverde, B., Barai, P., Barbano, A., Barkov, M., Barres de Almeida, U., Barrio, J.A., Bastieri, D., Becerra González, J., Becker Tjus, J., Bellizzi, L., Benbow, W., Bernardini, E., Bernardos, M.I., Bernlöhr, K., Berti, A., Berton, M., Bertucci, B., Beshley, V., Biasuzzi, B., Bigongiari, C., Bird, R., Bissaldi, E., Biteau, J., Blanch, O., Blazek, J., Boisson, C., Bonanno, G., Bonardi, A., Bonavolontá, C., Bonnoli, G., Bordas, P., Böttcher, M., Bregeon, J., Brill, A., Brown, A.M., Brügge, K., Brun, P., Bruno, P., Bulgarelli, A., Bulik, T., Burton, M., Burtovoi, A., Busetto, G., Cameron, R., Canestrari, R., Capalbi, M., Caproni, A., Capuzzo-Dolcetta, R., Caraveo, P., Caroff, S., Carosi, R., Casanova, S., Cascone, E., Cassol, F., Catalani, F., Catalano, O., Cauz, D., Cerruti, M., Chaty, S., Chen, A., Chernyakova, M., Chiaro, G., Cieślar, M., Colak, S.M., Conforti, V., Congiu, E., Contreras, J.L., Cortina, J., Costa, A., Costantini, H., Cotter, G., Cristofari, P., Cumani, P., Cusumano, G., D’Aí, A., D’Ammando, F., Dangeon, L., Da Vela, P., Dazzi, F., De Angelis, A., De Caprio, V., de Cássia dos Anjos, R., De Frondat, F., de Gouveia Dal Pino, E.M., De Lotto, B., De Martino, D., de Naurois, M., de Oña Wilhelmi, E., de Palma, F., de Souza, V., Del Santo, M., Delgado, C., della Volpe, D., Di Girolamo, T., Di Pierro, F., Di Venere, L., Díaz, C., Diebold, S., Djannati-Ataï, A., Dmytriiev, A., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Dournaux, J.-L., Ebr, J., Ekoume, T.R.N., Elsässer, D., Emery, G., Falceta-Goncalves, D., Fedorova, E., Fegan, S., Feng, Q., Ferrand, G., Fiandrini, E., Fiasson, A., Filipovic, M., Fioretti, V., Fiori, M., Flis, S., Fonseca, M.V., Fontaine, G., Freixas Coromina, L., Fukami, S., Fukui, Y., Funk, S., Füßling, M., Gaggero, D., Galanti, G., Garcia López, R.J., Garczarczyk, M., Gascon, D., Gasparetto, T., Gaug, M., Ghalumyan, A., Gianotti, F., Giavitto, G., Giglietto, N., Giordano, F., Giroletti, M., Gironnet, J., Glicenstein, J.-F., Gnatyk, R., Goldoni, P., González, J.M., González, M.M., Gourgouliatos, K.N., Grabarczyk, T., Granot, J., Green, D., Greenshaw, T., Grondin, M.-H., Gueta, O., Hadasch, D., Hassan, T., Hayashida, M., Heller, M., Hervet, O., Hinton, J., Hiroshima, N., Hnatyk, B., Hofmann, W., Horvath, P., Hrabovsky, M., Hrupec, D., Humensky, T.B., Hütten, M., Inada, T., Iocco, F., Ionica, M., Iori, M., Iwamura, Y., Jamrozy, M., Janecek, P., Jankowsky, D., Jean, P., Jouvin, L., Jurysek, J., Kaaret, P., Kadowaki, L.H.S., Karkar, S., Kerszberg, D., Khélifi, B., Kieda, D., Kimeswenger, S., Kluźniak, W., Knapp, J., Knödlseder, J., Kobayashi, Y., Koch, B., Kocot, J., Komin, N., Kong, A., Kowal, G., Krause, M., Kubo, H., Kushida, J., Kushwaha, P., La Parola, V., La Rosa, G., Lallena Arquillo, M., Lang, R.G., Lapington, J., Le Blanc, O., Lefaucheur, J., Leigui de Oliveira, M.A., Lemoine-Goumard, M., Lenain, J.-P., Leto, G., Lico, R., Lindfors, E., Lohse, T., Lombardi, S., Longo, F., Lopez, A., López, M., Lopez-Oramas, A., López-Coto, R., Loporchio, S., Luque-Escamilla, P.L., Lyard, E., Maccarone, M.C., Mach, E., Maggio, C., Majumdar, P., Malaguti, G., Mallamaci, M., Mandat, D., Maneva, G., Manganaro, M., Mangano, S., Marculewicz, M., Mariotti, M., Martí, J., Martínez, M., Martínez, G., Martínez-Huerta, H., Masuda, S., Maxted, N., Mazin, D., Meunier, J.-L., Meyer, M., Micanovic, S., Millul, R., Minaya, I.A., Mitchell, A., Mizuno, T., Moderski, R., Mohrmann, L., Montaruli, T., Moralejo, A., Morcuende, D., Morlino, G., Morselli, A., Moulin, E., Mukherjee, R., Munar, P., Mundell, C., Murach, T., Nagai, A., Nagayoshi, T., Naito, T., Nakamori, T., Nemmen, R., Niemiec, J., Nieto, D., Nievas Rosillo, M., Nikołajuk, M., Ninci, D., Nishijima, K., Noda, K., Nosek, D., Nöthe, M., Nozaki, S., Ohishi, M., Ohtani, Y., Okumura, A., Ong, R.A., Orienti, M., Orito, R., Ostrowski, M., Otte, N., Ou, Z., Oya, I., Pagliaro, A., Palatiello, M., Palatka, M., Paoletti, R., Paredes, J.M., Pareschi, G., Parmiggiani, N., Parsons, R.D., Patricelli, B., Pe’er, A., Pech, M., Peñil Del Campo, P., Pérez-Romero, J., Perri, M., Persic, M., Petrucci, P.-O., Petruk, O., Pfrang, K., Piel, Q., Pietropaolo, E., Pohl, M., Polo, M., Poutanen, J., Prandini, E., Produit, N., Prokoph, H., Prouza, M., Przybilski, H., Pühlhofer, G., Punch, M., Queiroz, F., Quirrenbach, A., Rainò, S., Rando, R., Razzaque, S., Reimer, O., Renault-Tinacci, N., Renier, Y., Ribeiro, D., Ribó, M., Rico, J., Rieger, F., Rizi, V., Rodriguez Fernandez, G., Rodriguez-Ramirez, J.C., Rodrí-guez Vázquez, J.J., Romano, P., Romeo, G., Roncadelli, M., Rosado, J., Rowell, G., Rudak, B., Rugliancich, A., Rulten, C., Sadeh, I., Saha, L., Saito, T., Sakurai, S., Salesa Greus, F., Sangiorgi, P., Sano, H., Santander, M., Santangelo, A., Santos-Lima, R., Sanuy, A., Satalecka, K., Saturni, F.G., Sawangwit, U., Schlenstedt, S., Schovanek, P., Schussler, F., Schwanke, U., Sciacca, E., Scuderi, S., Sedlaczek, K., Seglar-Arroyo, M., Sergijenko, O., Seweryn, K., Shalchi, A., Shellard, R.C., Siejkowski, H., Sillanpää, A., Sinha, A., Sironi, G., Sliusar, V., Slowikowska, A., Sol, H., Specovius, A., Spencer, S., Spengler, G., Stamerra, A., Stanič, S., Stawarz, Ł., Stefanik, S., Stolarczyk, T., Straumann, U., Suomijarvi, T., Świerk, P., Szepieniec, T., Tagliaferri, G., Tajima, H., Tam, T., Tavecchio, F., Taylor, L., Tejedor, L.A., Temnikov, P., Terzic, T., Testa, V., Tibaldo, L., Todero Peixoto, C.J., Tokanai, F., Tomankova, L., Tonev, D., Torres, D.F., Tosti, G., Tosti, L., Tothill, N., Toussenel, F., Tovmassian, G., Travnicek, P., Trichard, C., Umana, G., Vagelli, V., Valentino, M., Vallage, B., Vallania, P., Valore, L., Vandenbroucke, J., Varner, G.S., Vasileiadis, G., Vassiliev, V., Vázquez Acosta, M., Vecchi, M., Vercellone, S., Vergani, S., Vettolani, G.P., Viana, A., Vigorito, C.F., Vink, J., Vitale, V., Voelk, H., Vollhardt, A., Vorobiov, S., Wagner, S.J., Walter, R., Werner, F., White, R., Wierzcholska, A., Will, M., Williams, D.A., Wischnewski, R., Yang, L., Yoshida, T., Yoshikoshi, T., Zacharias, M., Zampieri, L., Zavrtanik, M., Zavrtanik, D., Zdziarski, A.A., Zech, A., Zechlin, H., Zenin, A., Zhdanov, V.I., Zimmer, S., and Zorn, J. more...

Published
2019
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24. Short-term variability of the transitional pulsar candidate CXOU J110926.4−650224 from X-rays to infrared.

Author

Coti Zelati, F., de Martino, D., Dhillon, V. S., Marsh, T. R., Vincentelli, F., Campana, S., Torres, D. F., Papitto, A., Baglio, M. C., Miraval Zanon, A., Rea, N., Brink, J., Buckley, D. A. H., D'Avanzo, P., Illiano, G., Manca, A., and Marino, A. more...

Subjects
*ACCRETION disks, *X-rays, *DATA analysis, *PULSARS, *PHENOMENOLOGY
Abstract

CXOU J110926.4−650224 is a candidate transitional millisecond pulsar (tMSP) with X-ray and radio emission properties reminiscent of those observed in confirmed tMSPs in their X-ray 'subluminous' disc state. We present the results of observing campaigns that, for the first time, characterise the optical and near-infrared variability of this source and establish a connection with the mode-switching phenomenon observed in X-rays. The optical emission exhibited flickering activity, frequent dipping episodes where it appeared redder, and a multi-peaked flare where it was bluer. The variability pattern was strongly correlated with that of the X-ray emission. Each dip matched an X-ray low-mode episode, indicating that a significant portion of the optical emission originates from nearly the same region as the X-ray emission. The near-infrared emission also displayed remarkable variability, including a dip of 20 min in length during which it nearly vanished. Time-resolved optical spectroscopic observations reveal significant changes in the properties of emission lines from the disc and help infer the spectral type of the companion star to be between K0 and K5. We compare the properties of CXOU J110926.4−650224 with those of other tMSPs in the X-ray subluminous disc state and discuss our findings within the context of a recently proposed scenario that explains the phenomenology exhibited by the prototypical tMSP PSR J1023+0038. [ABSTRACT FROM AUTHOR] more...

Published
2024
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25. Science with e-ASTROGAM: A space mission for MeV–GeV gamma-ray astrophysics

Author

De Angelis, A., Tatischeff, V., Grenier, I.A., McEnery, J., Mallamaci, M., Tavani, M., Oberlack, U., Hanlon, L., Walter, R., Argan, A., Von Ballmoos, P., Bulgarelli, A., Bykov, A., Hernanz, M., Kanbach, G., Kuvvetli, I., Pearce, M., Zdziarski, A., Conrad, J., Ghisellini, G., Harding, A., Isern, J., Leising, M., Longo, F., Madejski, G., Martinez, M., Mazziotta, M.N., Paredes, J.M., Pohl, M., Rando, R., Razzano, M., Aboudan, A., Ackermann, M., Addazi, A., Ajello, M., Albertus, C., Álvarez, J.M., Ambrosi, G., Antón, S., Antonelli, L.A., Babic, A., Baibussinov, B., Balbo, M., Baldini, L., Balman, S., Bambi, C., Barres de Almeida, U., Barrio, J.A., Bartels, R., Bastieri, D., Bednarek, W., Bernard, D., Bernardini, E., Bernasconi, T., Bertucci, B., Biland, A., Bissaldi, E., Boettcher, M., Bonvicini, V., Bosch-Ramon, V., Bottacini, E., Bozhilov, V., Bretz, T., Branchesi, M., Brdar, V., Bringmann, T., Brogna, A., Budtz Jørgensen, C., Busetto, G., Buson, S., Busso, M., Caccianiga, A., Camera, S., Campana, R., Caraveo, P., Cardillo, M., Carlson, P., Celestin, S., Cermeño, M., Chen, A., Cheung, C.C., Churazov, E., Ciprini, S., Coc, A., Colafrancesco, S., Coleiro, A., Collmar, W., Coppi, P., Curado da Silva, R., Cutini, S., D'Ammando, F., De Lotto, B., de Martino, D., De Rosa, A., Del Santo, M., Delgado, L., Diehl, R., Dietrich, S., Dolgov, A.D., Domínguez, A., Dominis Prester, D., Donnarumma, I., Dorner, D., Doro, M., Dutra, M., Elsaesser, D., Fabrizio, M., Fernández-Barral, A., Fioretti, V., Foffano, L., Formato, V., Fornengo, N., Foschini, L., Franceschini, A., Franckowiak, A., Funk, S., Fuschino, F., Gaggero, D., Galanti, G., Gargano, F., Gasparrini, D., Gehrz, R., Giammaria, P., Giglietto, N., Giommi, P., Giordano, F., Giroletti, M., Ghirlanda, G., Godinovic, N., Gouiffés, C., Grove, J.E., Hamadache, C., Hartmann, D.H., Hayashida, M., Hryczuk, A., Jean, P., Johnson, T., José, J., Kaufmann, S., Khelifi, B., Kiener, J., Knödlseder, J., Kole, M., Kopp, J., Kozhuharov, V., Labanti, C., Lalkovski, S., Laurent, P., Limousin, O., Linares, M., Lindfors, E., Lindner, M., Liu, J., Lombardi, S., Loparco, F., López-Coto, R., López Moya, M., Lott, B., Lubrano, P., Malyshev, D., Mankuzhiyil, N., Mannheim, K., Marchã, M.J., Marcianò, A., Marcote, B., Mariotti, M., Marisaldi, M., McBreen, S., Mereghetti, S., Merle, A., Mignani, R., Minervini, G., Moiseev, A., Morselli, A., Moura, F., Nakazawa, K., Nava, L., Nieto, D., Orienti, M., Orio, M., Orlando, E., Orleanski, P., Paiano, S., Paoletti, R., Papitto, A., Pasquato, M., Patricelli, B., Pérez-García, M.Á., Persic, M., Piano, G., Pichel, A., Pimenta, M., Pittori, C., Porter, T., Poutanen, J., Prandini, E., Prantzos, N., Produit, N., Profumo, S., Queiroz, F.S., Rainó, S., Raklev, A., Regis, M., Reichardt, I., Rephaeli, Y., Rico, J., Rodejohann, W., Rodriguez Fernandez, G., Roncadelli, M., Roso, L., Rovero, A., Ruffini, R., Sala, G., Sánchez-Conde, M.A., Santangelo, A., Saz Parkinson, P., Sbarrato, T., Shearer, A., Shellard, R., Short, K., Siegert, T., Siqueira, C., Spinelli, P., Stamerra, A., Starrfield, S., Strong, A., Strümke, I., Tavecchio, F., Taverna, R., Terzić, T., Thompson, D.J., Tibolla, O., Torres, D.F., Turolla, R., Ulyanov, A., Ursi, A., Vacchi, A., Van den Abeele, J., Vankova-Kirilovai, G., Venter, C., Verrecchia, F., Vincent, P., Wang, X., Weniger, C., Wu, X., Zaharijaš, G., Zampieri, L., Zane, S., Zimmer, S., and Zoglauer, A. more...

Published
2018
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26. The THESEUS space mission concept: science case, design and expected performances

Author

Amati, L., O’Brien, P., Götz, D., Bozzo, E., Tenzer, C., Frontera, F., Ghirlanda, G., Labanti, C., Osborne, J.P., Stratta, G., Tanvir, N., Willingale, R., Attina, P., Campana, R., Castro-Tirado, A.J., Contini, C., Fuschino, F., Gomboc, A., Hudec, R., Orleanski, P., Renotte, E., Rodic, T., Bagoly, Z., Blain, A., Callanan, P., Covino, S., Ferrara, A., Le Floch, E., Marisaldi, M., Mereghetti, S., Rosati, P., Vacchi, A., D’Avanzo, P., Giommi, P., Piranomonte, S., Piro, L., Reglero, V., Rossi, A., Santangelo, A., Salvaterra, R., Tagliaferri, G., Vergani, S., Vinciguerra, S., Briggs, M., Campolongo, E., Ciolfi, R., Connaughton, V., Cordier, B., Morelli, B., Orlandini, M., Adami, C., Argan, A., Atteia, J.-L., Auricchio, N., Balazs, L., Baldazzi, G., Basa, S., Basak, R., Bellutti, P., Bernardini, M.G., Bertuccio, G., Braga, J., Branchesi, M., Brandt, S., Brocato, E., Budtz-Jorgensen, C., Bulgarelli, A., Burderi, L., Camp, J., Capozziello, S., Caruana, J., Casella, P., Cenko, B., Chardonnet, P., Ciardi, B., Colafrancesco, S., Dainotti, M.G., D’Elia, V., De Martino, D., De Pasquale, M., Del Monte, E., Della Valle, M., Drago, A., Evangelista, Y., Feroci, M., Finelli, F., Fiorini, M., Fynbo, J., Gal-Yam, A., Gendre, B., Ghisellini, G., Grado, A., Guidorzi, C., Hafizi, M., Hanlon, L., Hjorth, J., Izzo, L., Kiss, L., Kumar, P., Kuvvetli, I., Lavagna, M., Li, T., Longo, F., Lyutikov, M., Maio, U., Maiorano, E., Malcovati, P., Malesani, D., Margutti, R., Martin-Carrillo, A., Masetti, N., McBreen, S., Mignani, R., Morgante, G., Mundell, C., Nargaard-Nielsen, H.U., Nicastro, L., Palazzi, E., Paltani, S., Panessa, F., Pareschi, G., Pe’er, A., Penacchioni, A.V., Pian, E., Piedipalumbo, E., Piran, T., Rauw, G., Razzano, M., Read, A., Rezzolla, L., Romano, P., Ruffini, R., Savaglio, S., Sguera, V., Schady, P., Skidmore, W., Song, L., Stanway, E., Starling, R., Topinka, M., Troja, E., van Putten, M., Vanzella, E., Vercellone, S., Wilson-Hodge, C., Yonetoku, D., Zampa, G., Zampa, N., Zhang, B., Zhang, B.B., Zhang, S., Zhang, S.-N., Antonelli, A., Bianco, F., Boci, S., Boer, M., Botticella, M.T., Boulade, O., Butler, C., Campana, S., Capitanio, F., Celotti, A., Chen, Y., Colpi, M., Comastri, A., Cuby, J.-G., Dadina, M., De Luca, A., Dong, Y.-W., Ettori, S., Gandhi, P., Geza, E., Greiner, J., Guiriec, S., Harms, J., Hernanz, M., Hornstrup, A., Hutchinson, I., Israel, G., Jonker, P., Kaneko, Y., Kawai, N., Wiersema, K., Korpela, S., Lebrun, V., Lu, F., MacFadyen, A., Malaguti, G., Maraschi, L., Melandri, A., Modjaz, M., Morris, D., Omodei, N., Paizis, A., Páta, P., Petrosian, V., Rachevski, A., Rhoads, J., Ryde, F., Sabau-Graziati, L., Shigehiro, N., Sims, M., Soomin, J., Szécsi, D., Urata, Y., Uslenghi, M., Valenziano, L., Vianello, G., Vojtech, S., Watson, D., and Zicha, J. more...

Published
2018
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28. Evolution of spin in the intermediate polar CC sculptoris.

Author

Paice, John A, Scaringi, S, Castro Segura, N, Sahu, A, Iłkiewicz, K, Coppejans, Deanne L, De Martino, D, Knigge, C, and Veresvarska, M

Subjects
DWARF novae, DWARF stars, WHITE dwarf stars, CATACLYSMIC variable stars
Abstract

We report on spin variations in the intermediate polar and cataclysmic variable CC Scl, as seen by the Transiting Exoplanet Survey Satellite (TESS). By studying both the spin period and its harmonic, we find that the spin has varied since it was first observed in 2011. We find the latest spin value for the source to be 389.473(6) s, equivalent to 0.00450779(7) d, 0.02 s shorter than the first value measured. A linear fit to these and intermediate data give a rate of change of spin (Ṗ) ∼ −4.26(2.66)× 10−11 and a characteristic time-scale τ ∼ 2.90 × 105 yr, in line with other known intermediate polars with varying spin. The spin profile of this source also matches theoretical spin profiles of high-inclination intermediate polars, and furthermore, appears to have changed in shape over a period of three years. Such 'spin-up' in an intermediate polar is considered to be from mass accretion on to the white dwarf (the primary), and we note the presence of dwarf nova eruptions in this source as being a possible catalyst of the variations. [ABSTRACT FROM AUTHOR] more...

Published
2024
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29. Burst-induced spin variations in the accreting magnetic white dwarf PBC J0801.2–4625.

Author

Irving, Z A, Altamirano, D, Scaringi, S, Veresvarska, M, Knigge, C, Castro Segura, N, De Martino, D, and Iłkiewicz, K

Subjects
MAGNETIC declination, WHITE dwarf stars, DWARF novae, DWARF stars, LIGHT curves, ASTRONOMICAL surveys, STELLAR magnetic fields, SOLAR radio bursts
Abstract

PBC J0801.2–4625 is an intermediate polar with a primary spin frequency of 66.08 d−1 and an unknown orbital period. The long-term All Sky Automated Survey for Supernovae (ASAS-SN) light curve of this system reveals four bursts, all of which have similar peak amplitudes (∼2 mag) and durations (∼2 d). In this work, we primarily study the timing properties of this system's 2019 February burst, which was simultaneously observed by both ASAS-SN and the Transiting Exoplanet Survey Satellite (TESS). Pre-burst, a frequency of 4.064 ± 0.002 d−1(5.906 ± 0.003 h period), likely attributed to the binary orbit, is identified in addition to previous measurements for the white dwarf's spin. During the burst, however, we find a spin frequency of 68.35 ± 0.28 d−1. Post-burst, the spin returns to its pre-brust value but with a factor 1.82 ± 0.05 larger amplitude. The burst profile is double-peaked, and we estimate its energy to be 3.3 × 1039 erg. We conclude that the burst appears most consistent with thermonuclear runaway (i.e. a 'micronova'), and suggest that the spin variations may be an analogue to burst oscillations (i.e. 'micronova oscillations'). However, we also note that the above findings could be explained by a dwarf nova outburst. With the available data, we are unable to distinguish between these two scenarios. [ABSTRACT FROM AUTHOR] more...

Published
2024
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33. The peculiar bursting nature of CP Pup.

Author

Veresvarska, M, Scaringi, S, Hagen, S, De Martino, D, Done, C, Ilkiewicz, K, Knigge, C, and Littlefield, C

Subjects
LIGHT curves, ACCRETION disks, NOVAE (Astronomy)
Abstract

The classical nova CP Puppis has been observed to have particularly puzzling and peculiar properties. In particular, this classical nova displays occasional bursts in its long-term ASAS-SN light curve. Here, we report on five sectors of TESS data displaying two of these rapid bursts, lasting ∼1 d. Based on the estimated lower energy limits of the bursts, we discuss whether the bursts may be examples of micronovae resulting from localized thermonuclear explosion. Furthermore, its orbital period remains uncertain, with several inconsistent periodic signals appearing in spectroscopic and photometric observations at various wavelengths. Although we cannot unambiguously unravel the physical origin of the signals, the previously suggested nature of CP Puppis as a long orbital period system may be a viable explanation. The recurrence time of the bursts in CP Puppis, together with the unexplained variable modulations make it a prime candidate for intense monitoring. [ABSTRACT FROM AUTHOR] more...

Published
2024
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34. A soft and transient ultraluminous X-ray source with six-hour modulation in the NGC 300 galaxy.

Author

Sacchi, A., Esposito, P., de Martino, D., Soria, R., Israel, G. L., Sander, A. A. C., Sidoli, L., Buckley, D. A. H., Monageng, I. M., Tiengo, A., Arca Sedda, M., Pinto, C., Di Stefano, R., Imbrogno, M., Carleo, A., and Rivolta, G. more...

Subjects
BINARY stars, X-rays, SOFT X rays, SPIRAL galaxies, GALAXIES
Abstract

We investigate the nature of CXOU J005440.5−374320 (J0054), a peculiar bright (∼4 × 1039 erg s−1) and soft X-ray transient in the spiral galaxy NGC 300 with a six-hour periodic flux modulation that was detected in a 2014 Chandra observation. Subsequent observations with Chandra and XMM-Newton, as well as a large observational campaign of NGC 300 and its sources performed with the Swift Neil Gehrels Observatory, showed that this source exhibits recurrent flaring activity: four other outbursts were detected across ∼8 years of monitoring. Using data from the Swift/UVOT archive and from the XMM-Newton/OM and Gaia catalogues, we determined that the source is likely associated with a bright blue optical/ultraviolet counterpart. This prompted us to perform follow-up observations with the Southern African Large Telescope in December 2019. With the multi-wavelength information at hand, we discuss several possibilities for the nature of J0054. Although none is able to account for the full range of the observed peculiar features, we found that the two most promising scenarios are a stellar-mass compact object in a binary system with a Wolf–Rayet star companion, or the recurrent tidal stripping of a stellar object trapped in a system with an intermediate-mass (∼1000 M⊙) black hole. [ABSTRACT FROM AUTHOR] more...

Published
2024
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37. The e-ASTROGAM mission: Exploring the extreme Universe with gamma rays in the MeV – GeV range

Author

De Angelis, A., Tatischeff, V., Tavani, M., Oberlack, U., Grenier, I., Hanlon, L., Walter, R., Argan, A., von Ballmoos, P., Bulgarelli, A., Donnarumma, I., Hernanz, M., Kuvvetli, I., Pearce, M., Zdziarski, A., Aboudan, A., Ajello, M., Ambrosi, G., Bernard, D., Bernardini, E., Bonvicini, V., Brogna, A., Branchesi, M., Budtz-Jorgensen, C., Bykov, A., Campana, R., Cardillo, M., Coppi, P., De Martino, D., Diehl, R., Doro, M., Fioretti, V., Funk, S., Ghisellini, G., Grove, E., Hamadache, C., Hartmann, D. H., Hayashida, M., Isern, J., Kanbach, G., Kiener, J., Knödlseder, J., Labanti, C., Laurent, P., Limousin, O., Longo, F., Mannheim, K., Marisaldi, M., Martinez, M., Mazziotta, M. N., McEnery, J., Mereghetti, S., Minervini, G., Moiseev, A., Morselli, A., Nakazawa, K., Orleanski, P., Paredes, J. M., Patricelli, B., Peyré, J., Piano, G., Pohl, M., Ramarijaona, H., Rando, R., Reichardt, I., Roncadelli, M., Silva, R., Tavecchio, F., Thompson, D. J., Turolla, R., Ulyanov, A., Vacchi, A., Wu, X., Zoglauer, A., and The e-ASTROGAM Collaboration more...

Published
2017
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46. European Multicentre Tics in Children Studies (EMTICS)

Author

Schrag, A, Martino, D, Apter, A, Ball, J, Bartolini, E, Benaroya-Milshtein, N, Buttiglione, M, Cardona, F, Creti, R, Efstratiou, A, Gariup, M, Georgitsi, M, Hedderly, T, Heyman, I, Margarit, I, Mir, P, Moll, N, Morer, A, Müller, N, Müller-Vahl, K, Münchau, A, Orefici, G, Plessen, Kj, Porcelli, C, Paschou, P, Rizzo, R, Roessner, V, Schwarz, Mj, Steinberg, T, Tagwerker Gloor, F, Tarnok, Z, Walitza, S, Dietrich, A, Hoekstra, Pj, Zacharias, Anastasiou, Isobel, Heyman, Chaim, Huyser, Marcos, Madruga, Pablo, Mir, Astrid, Morer, Nanette Mol Debes, Natalie, Moll, Norbert Mu ̈ller, Peter, Nagy, Kerstin Jessica Plessen, Cesare, Porcelli, Renata, Rizzo, Veit, Roessner, Jaana, Schnell, Liselotte, Skov, Zsanett, Tarnok, Susanne, Walitza, Andrea, Dietrich, Baglioni, Valentina, Juliane, Ball, Emese, Bognar, Bianka, Burger, Judith, Buse, Marta Correa Vela, Maria Cristina Ferro, Carolin, Fremer, Mariangela, Gulisano, Annelieke, Hagen, Julie, Hagstrøm, Anna, Marotta, Neri, Valeria, Thaïra J, C Openneer, Pellico, Alessandra, Kerstin, J Plessen, Daphna, Ruhrman, Jaana M, L Schnell, Silvestri, PAOLA ROSARIA, Tamar, Steinberg, Friederike Tagwerker Gloor, Elif, Weidinger, EMTICS Collaborative Group, Anastasiou, Z., Apter, A., Baglioni, V., Ball, J., Bartolini, E., Benaroya-Milshtein, N., Bodmer, B., Bognar, E., Burger, B., Buse, J., Buttiglione, M., Cardona, F., Correa Vela, M., Creti, R., Dietrich, A., Debes, N.M., Efstratiou, A., Ferro, M.C., Fremer, C., Garcia-Delgar, B., Gariup, M., Georgitsi, M., Gulisano, M., Hagen, A., Hagstrøm, J., Hedderly, T.J., Heyman, I., Hoekstra, P.J., Huyser, C., Imperi, M., Karagiannidis, I., Laviola, G., Macri, S., Madruga-Garrido, M., Margarit, I., Marotta, A., Martino, D., Meier, U.C., Mir, P., Moll, N., Morer, A., Müller, N., Müller-Vahl, K., Münchau, A., Nagy, P., Neri, V., Openneer, TJC, Orefici, G., Paschou, P., Pellico, A., Petruzzelli, O., Plessen, K.J., Porcelli, C., Redondo, M., Rizzo, R., Roazzi, P., Roessner, V., Ruhrman, D., Schnell, JML, Schrag, A., Schütze, G.A., Schwarz, M.J., Silvestri, P.R., Skov, L., Steinberg, T., Stöber, S., Gloor, F.T., Tallon, M., Tarnok, Z., Turner, V.L., Walitza, S., Weidinger, E., Woods, M.L., European Commission, National Institute for Health Research (UK), NIHR Biomedical Research Centre (UK), University College London, NHS Foundation Trust, GlaxoSmithKline, German Research Foundation, Instituto de Biomedicina de Sevilla (IBIS), and Clinical Cognitive Neuropsychiatry Research Program (CCNP) more...

Subjects
Male, Pediatrics, Tic disorder, BLOOD, Tourette syndrome, Obsessive–compulsive disorder, Cohort Studies, 0302 clinical medicine, Risk Factors, QUALITY-OF-LIFE, Obsessive-compulsive disorder, Developmental and Educational Psychology, Genetics, Longitudinal, Streptococcal infection, Stress, Prospective cohort study, Child, GENE-EXPRESSION, education.field_of_study, HAIR CORTISOL, 05 social sciences, A STREPTOCOCCAL INFECTIONS, Original Contribution, General Medicine, 3. Good health, Europe, Psychiatry and Mental health, LA-TOURETTE SYNDROME, Child, Preschool, NEUROPSYCHIATRIC DISORDERS, Cohort, Female, 050104 developmental & child psychology, Cohort study, medicine.medical_specialty, congenital, hereditary, and neonatal diseases and abnormalities, Tics, Adolescent, PSYCHOSOCIAL STRESS, Population, 03 medical and health sciences, mental disorders, medicine, Humans, 0501 psychology and cognitive sciences, Genetic Predisposition to Disease, education, Tic Disorders/complications, Tic Disorders/diagnosis, Tic Disorders/pathology, business.industry, OBSESSIVE-COMPULSIVE DISORDER, medicine.disease, 030227 psychiatry, nervous system diseases, body regions, PSYCHOMETRIC PROPERTIES, Tic Disorders, Pediatrics, Perinatology and Child Health, Chronic Tic Disorder, business, human activities
Abstract

EMTICS Collaborative Group., Genetic predisposition, autoimmunity and environmental factors [e.g. pre- and perinatal difficulties, Group A Streptococcal (GAS) and other infections, stress-inducing events] might interact to create a neurobiological vulnerability to the development of tics and associated behaviours. However, the existing evidence for this relies primarily on small prospective or larger retrospective population-based studies, and is therefore still inconclusive. This article describes the design and methodology of the EMTICS study, a longitudinal observational European multicentre study involving 16 clinical centres, with the following objectives: (1) to investigate the association of environmental factors (GAS exposure and psychosocial stress, primarily) with the onset and course of tics and/or obsessive–compulsive symptoms through the prospective observation of at-risk individuals (ONSET cohort: 260 children aged 3–10 years who are tic-free at study entry and have a first-degree relative with a chronic tic disorder) and affected individuals (COURSE cohort: 715 youth aged 3–16 years with a tic disorder); (2) to characterise the immune response to microbial antigens and the host’s immune response regulation in association with onset and exacerbations of tics; (3) to increase knowledge of the human gene pathways influencing the pathogenesis of tic disorders; and (4) to develop prediction models for the risk of onset and exacerbations of tic disorders. The EMTICS study is, to our knowledge, the largest prospective cohort assessment of the contribution of different genetic and environmental factors to the risk of developing tics in putatively predisposed individuals and to the risk of exacerbating tics in young individuals with chronic tic disorders., This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under Grant agreement no. 278367. Schrag was supported by the National Institute for Health Research UCLH Biomedical Research Centre, and Müller, Burger, Schnell and Weidinger by Stiftung Immunität und Seele. This research was supported by the National Institute for Health Research Biomedical Research Centre at Great Ormond Street Hospital for Children NHS Foundation Trust and University College London (Heyman); partially sponsored by GSK Vaccines (Margarit, Bartolini); and Deutsche Forschungsgemeinschaft (DFG): projects 1692/3-1, 4-1 (Münchau). more...

Published
2019
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48. Gaia white dwarfs within 40 pc – III. Spectroscopic observations of new candidates in the Southern hemisphere.

Author

O'Brien, Mairi W, Tremblay, P-E, Gentile Fusillo, N P, Hollands, M A, Gänsicke, B T, Koester, D, Pelisoli, I, Cukanovaite, E, Cunningham, T, Doyle, A E, Elms, A, Farihi, J, Hermes, J J, Holberg, J, Jordan, S, Klein, B L, Kleinman, S J, Manser, C J, De Martino, D, and Marsh, T R more...

Subjects
WHITE dwarf stars, VERY large telescopes, MAIN sequence (Astronomy), SPECTRAL lines, HYDROGEN content of metals, DATA release
Abstract

We present a spectroscopic survey of 248 white dwarf candidates within 40 pc of the Sun; of these 244 are in the Southern hemisphere. Observations were performed mostly with the Very Large Telescope (X-Shooter) and Southern Astrophysical Research Telescope. Almost all candidates were selected from Gaia Data Release 3 (DR3). We find a total of 246 confirmed white dwarfs, 209 of which had no previously published spectra, and two main-sequence star contaminants. Of these, 100 white dwarfs display hydrogen Balmer lines, 69 have featureless spectra, and two show only neutral helium lines. Additionally, 14 white dwarfs display traces of carbon, while 37 have traces of other elements that are heavier than helium. We observe 35 magnetic white dwarfs through the detection of Zeeman splitting of their hydrogen Balmer or metal spectral lines. High spectroscopic completeness (> 97 per cent) has now been reached, such that we have 1058 confirmed Gaia DR3 white dwarfs out of 1083 candidates within 40 pc of the Sun at all declinations. [ABSTRACT FROM AUTHOR] more...

Published
2023
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50. The Large Observatory for X-ray Timing (LOFT)

Author

Feroci, M., Stella, L., van der Klis, M., Courvoisier, T. J. -L., Hernanz, M., Hudec, R., Santangelo, A., Walton, D., Zdziarski, A., Barret, D., Belloni, T., Braga, J., Brandt, S., Budtz-Jørgensen, C., Campana, S., den Herder, J. -W., Huovelin, J., Israel, G. L., Pohl, M., Ray, P., Vacchi, A., Zane, S., Argan, A., Attinà, P., Bertuccio, G., Bozzo, E., Campana, R., Chakrabarty, D., Costa, E., De Rosa, A., Del Monte, E., Di Cosimo, S., Donnarumma, I., Evangelista, Y., Haas, D., Jonker, P., Korpela, S., Labanti, C., Malcovati, P., Mignani, R., Muleri, F., Rapisarda, M., Rashevsky, A., Rea, N., Rubini, A., Tenzer, C., Wilson-Hodge, C., Winter, B., Wood, K., Zampa, G., Zampa, N., Abramowicz, M. A., Alpar, M. A., Altamirano, D., Alvarez, J. M., Amati, L., Amoros, C., Antonelli, L. A., Artigue, R., Azzarello, P., Bachetti, M., Baldazzi, G., Barbera, M., Barbieri, C., Basa, S., Baykal, A., Belmont, R., Boirin, L., Bonvicini, V., Burderi, L., Bursa, M., Cabanac, C., Cackett, E., Caliandro, G. A., Casella, P., Chaty, S., Chenevez, J., Coe, M. J., Collura, A., Corongiu, A., Covino, S., Cusumano, G., D’Amico, F., Dall’Osso, S., De Martino, D., De Paris, G., Di Persio, G., Di Salvo, T., Done, C., Dovčiak, M., Drago, A., Ertan, U., Fabiani, S., Falanga, M., Fender, R., Ferrando, P., Della Monica Ferreira, D., Fraser, G., Frontera, F., Fuschino, F., Galvez, J. L., Gandhi, P., Giommi, P., Godet, O., Göǧüş, E., Goldwurm, A., Götz, D., Grassi, M., Guttridge, P., Hakala, P., Henri, G., Hermsen, W., Horak, J., Hornstrup, A., in’t Zand, J. J. M., Isern, J., Kalemci, E., Kanbach, G., Karas, V., Kataria, D., Kennedy, T., Klochkov, D., Kluźniak, W., Kokkotas, K., Kreykenbohm, I., Krolik, J., Kuiper, L., Kuvvetli, I., Kylafis, N., Lattimer, J. M., Lazzarotto, F., Leahy, D., Lebrun, F., Lin, D., Lund, N., Maccarone, T., Malzac, J., Marisaldi, M., Martindale, A., Mastropietro, M., McClintock, J., McHardy, I., Mendez, M., Mereghetti, S., Miller, M. C., Mineo, T., Morelli, E., Morsink, S., Motch, C., Motta, S., Muñoz-Darias, T., Naletto, G., Neustroev, V., Nevalainen, J., Olive, J. F., Orio, M., Orlandini, M., Orleanski, P., Ozel, F., Pacciani, L., Paltani, S., Papadakis, I., Papitto, A., Patruno, A., Pellizzoni, A., Petráček, V., Petri, J., Petrucci, P. O., Phlips, B., Picolli, L., Possenti, A., Psaltis, D., Rambaud, D., Reig, P., Remillard, R., Rodriguez, J., Romano, P., Romanova, M., Schanz, T., Schmid, C., Segreto, A., Shearer, A., Smith, A., Smith, P. J., Soffitta, P., Stergioulas, N., Stolarski, M., Stuchlik, Z., Tiengo, A., Torres, D., Török, G., Turolla, R., Uttley, P., Vaughan, S., Vercellone, S., Waters, R., Watts, A., Wawrzaszek, R., Webb, N., Wilms, J., Zampieri, L., Zezas, A., and Ziolkowski, J. more...

Published
2012
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