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1. The near-infrared degree of polarization in debris disks. Toward a self-consistent approach to model scattered light observations

Author: Olofsson, J., primary, Thébault, P., additional, Bayo, A., additional, Henning, Th., additional, and Milli, J., additional
Published: 2024
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2. CHEOPS in-flight performance. A comprehensive look at the first 3.5 years of operations

Author: Fortier, A., primary, Simon, A.E., additional, Broeg, C., additional, Olofsson, G., additional, Deline, A., additional, Wilson, T.G., additional, Maxted, P.F.L., additional, Brandeker, A., additional, Collier Cameron, A., additional, Beck, M., additional, Bekkelien, A., additional, Billot, N., additional, Bonfanti, A., additional, Bruno, G., additional, Cabrera, J., additional, Delrez, L., additional, Demory, B.-O., additional, Futyan, D., additional, Florén, H.-G., additional, Günther, M.N., additional, Heitzmann, A., additional, Hoyer, S., additional, Isaak, K.G., additional, Sousa, S.G., additional, Stalport, M., additional, Turin, A., additional, Verhoeve, P., additional, Akinsanmi, B., additional, Alibert, Y., additional, Alonso, R., additional, Bánhidi, D., additional, Bárczy, T., additional, Barrado, D., additional, Barros, S.C., additional, Baumjohann, W., additional, Baycroft, T., additional, Beck, T., additional, Benz, W., additional, Bíró, B.I., additional, Bódi, A., additional, Bonfils, X., additional, Borsato, L., additional, Charnoz, S., additional, Cseh, B., additional, Csizmadia, Sz., additional, Csanyi, I., additional, Cubillos, P.E., additional, Davies, M.B., additional, Davis, Y.T., additional, Deleuil, M., additional, Demangeon, O.D.S., additional, Derekas, A., additional, Dransfield, G., additional, Ducrot, E., additional, Ehrenreich, D., additional, Erikson, A., additional, Fariña, C., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Garai, Z., additional, Garcia, L., additional, Gillon, M., additional, Gómez Maqueo Chew, Y., additional, Gómez-Muñoz, M.A., additional, Granata, V., additional, Güdel, M., additional, Guterman, P., additional, Hegedus, T., additional, Helling, Ch., additional, Jehin, E., additional, Kalup, Cs., additional, Kilkenny, D., additional, Kiss, L., additional, Kriskovics, L., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Lopez Pina, A., additional, Luntzer, A., additional, Magrin, D., additional, Miller, N.J., additional, Modrego Contreras, D., additional, Mordasini, C., additional, Munari, M., additional, Murray, C.A., additional, Nascimbeni, V., additional, Ottacher, H., additional, Ottensamer, R., additional, Pagano, I., additional, Pál, A., additional, Pallé, E., additional, Pasetti, A., additional, Pedersen, P., additional, Peter, G., additional, Petrucci, R., additional, Piotto, G., additional, Pizarro-Rubio, A., additional, Pollacco, D., additional, Pribulla, T., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Sabin, L., additional, Santos, N.C., additional, Scandariato, G., additional, Schanche, N., additional, Schroffenegger, U., additional, Scutt, O.J., additional, Sebastian, D., additional, Ségransan, D., additional, Seli, B., additional, Smith, A.M.S., additional, Southworth, R., additional, Standing, M.R., additional, Szabó, M. Gy., additional, Szakáts, R., additional, Thomas, N., additional, Timmermans, M., additional, Triaud, A.H.M.J., additional, Udry, S., additional, Van Grootel, V., additional, Venturini, J., additional, Villaver, E., additional, Vinkó, J., additional, Walton, N.A., additional, Wells, R., additional, and Wolter, D., additional
Published: 2024
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3. HIP 41378 observed by CHEOPS: Where is planet d?

Author: Sulis, S., primary, Borsato, L., additional, Grouffal, S., additional, Osborn, H.P., additional, Santerne, A., additional, Brandeker, A., additional, Günther, M.N., additional, Heitzmann, A., additional, Lendl, M., additional, Fridlund, M., additional, Gandolfi, D., additional, Alibert, Y., additional, Alonso, R., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S.C., additional, Baumjohann, W., additional, Beck, T., additional, Benz, W., additional, Bergomi, M., additional, Billot, N., additional, Bonfanti, A., additional, Broeg, C., additional, Collier Cameron, A., additional, Corral van Damme, C., additional, Correia, A.C.M., additional, Csizmadia, Sz., additional, Cubillos, P.E., additional, Davies, M.B., additional, Deleuil, M., additional, Deline, A., additional, Delrez, L., additional, Demangeon, O.D.S., additional, Demory, B.-O., additional, Derekas, A., additional, Edwards, B., additional, Ehrenreich, D., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Gazeas, K., additional, Gillon, M., additional, Güdel, M., additional, Helling, Ch., additional, Hoyer, S., additional, Isaak, K.G., additional, Kiss, L., additional, Korth, J., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Magrin, D., additional, Maxted, P.F.L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piazza, D., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N.C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A.E., additional, Smith, A.M.S., additional, Sousa, S.G., additional, Stalport, M., additional, Steinberger, M., additional, Szabó, M. Gy., additional, Tuson, A., additional, Udry, S., additional, Ulmer-Moll, S., additional, Van Grootel, V., additional, Venturini, J., additional, Villaver, E., additional, Walton, N.A., additional, Wilson, T.G., additional, Wolter, D., additional, and Zingales, T., additional
Published: 2024
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4. MINDS: JWST/NIRCam imaging of the protoplanetary disk PDS 70. A spiral accretion stream and a potential third protoplanet

Author: Christiaens, V., primary, Samland, M., additional, Henning, Th., additional, Portilla-Revelo, B., additional, Perotti, G., additional, Matthews, E., additional, Absil, O., additional, Decin, L., additional, Kamp, I., additional, Boccaletti, A., additional, Tabone, B., additional, Marleau, G.-D., additional, van Dishoeck, E.F., additional, G\"udel, M., additional, Lagage, P.-O., additional, Barrado, D., additional, Caratti o Garatti, A., additional, Glauser, A.M., additional, Olofsson, G., additional, Ray, T.P., additional, Scheithauer, S., additional, Vandenbussche, B., additional, Waters, L.B.F.M., additional, Arabhavi, A.M., additional, Grant, S.L., additional, Jang, H., additional, Kanwar, J., additional, Schreiber, J., additional, Schwarz, K., additional, Temmink, M., additional, and \"Ostlin, G., additional
Published: 2024
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5. Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST's MIRI coronagraph

Author: Boccaletti, Anthony, primary, Mâlin, Mathilde, additional, Baudoz, Pierre, additional, Tremblin, Pascal, additional, Perrot, Clément, additional, Rouan, Daniel, additional, Lagage, Pierre-Olivier, additional, Whiteford, Niall, additional, Mollière, Paul, additional, Waters, Rens, additional, Henning, Thomas, additional, Decin, Leen, additional, Güdel, Manuel, additional, Vandenbussche, Bart, additional, Absil, Olivier, additional, Argyriou, Ioannis, additional, Bouwman, Jeroen, additional, Cossou, Christophe, additional, Coulais, Alain, additional, Gastaud, René, additional, Glasse, Alistair, additional, Glauser, Adrian M., additional, Kamp, Inga, additional, Kendrew, Sarah, additional, Krause, Oliver, additional, Lahuis, Fred, additional, Mueller, Michael, additional, Olofsson, Goran, additional, Patapis, Polychronis, additional, Pye, John, additional, Royer, Pierre, additional, Serabyn, Eugene, additional, Scheithauer, Silvia, additional, Colina, Luis, additional, van Dishoeck, Ewine F., additional, Ostlin, Göran, additional, Ray, Tom P., additional, and Wright, Gillian, additional
Published: 2024
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6. Planets observed with CHEOPS

Author: Fridlund, M., primary, Georgieva, I. Y., additional, Bonfanti, A., additional, Alibert, Y., additional, Persson, C. M., additional, Gandolfi, D., additional, Beck, M., additional, Deline, A., additional, Hoyer, S., additional, Olofsson, G., additional, Wilson, T. G., additional, Barragán, O., additional, Fossati, L., additional, Mustill, A. J., additional, Brandeker, A., additional, Hatzes, A., additional, Florén, H.-G., additional, Simola, U., additional, Hooton, M. J., additional, Luque, R., additional, Sousa, S. G., additional, Egger, J. A., additional, Antoniadis-Karnavas, A., additional, Salmon, S., additional, Adibekyan, V., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, T., additional, Benz, W., additional, Bonfils, X., additional, Broeg, C., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Csizmadia, Sz., additional, Davies, M. B., additional, Deeg, H., additional, Deleuil, M., additional, Delrez, L., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Esposito, M., additional, Fortier, A., additional, Gillon, M., additional, Güdel, M., additional, Heng, K., additional, Isaak, K. G., additional, Kiss, L. L., additional, Korth, J., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Livingston, J., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Muresan, A., additional, Nascimbeni, V., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Redfield, S., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Serrano, L. M., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Van Eylen, V., additional, Van Grootel, V., additional, and Walton, N. A., additional
Published: 2024
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7. The tidal deformation and atmosphere of WASP-12\,b from its phase curve

Author: Akinsanmi, B., primary, Barros, S.C., additional, Lendl, M., additional, Carone, L., additional, Cubillos, P.E., additional, Bekkelien, A., additional, Fortier, A., additional, Florén, H.-G., additional, Collier Cameron, A., additional, Boué, G., additional, Bruno, G., additional, Demory, B.-O., additional, Brandeker, A., additional, Sousa, S.G., additional, Wilson, T.G., additional, Deline, A., additional, Bonfanti, A., additional, Scandariato, G., additional, Hooton, M.J., additional, Correia, A.C.M., additional, Demangeon, O.D.S., additional, Smith, A.M.S., additional, Singh, V., additional, Alibert, Y., additional, Alonso, R., additional, Asquier, J., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Buder, M., additional, Charnoz, S., additional, Csizmadia, Sz., additional, Davies, M.B., additional, Deleuil, M., additional, Delrez, L., additional, Ehrenreich, D., additional, Erikson, A., additional, Farinato, J., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Günther, M.N., additional, Heitzmann, A., additional, Helling, Ch., additional, Hoyer, S., additional, Isaak, K.G., additional, Kiss, L., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Magrin, D., additional, Maxted, P.F.L., additional, Mecina, M., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piazza, D., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N.C., additional, Ségransan, D., additional, Simon, A.E., additional, Stalport, M., additional, Szabó, M. Gy., additional, Thomas, N., additional, Udry, S., additional, Van Grootel, V., additional, Venturini, J., additional, Villaver, E., additional, and Walton, N.A., additional
Published: 2024
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8. Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI.

Author: Mâlin, Mathilde, Boccaletti, Anthony, Perrot, Clément, Baudoz, Pierre, Rouan, Daniel, Lagage, Pierre-Olivier, Waters, Rens, Güdel, Manuel, Henning, Thomas, Vandenbussche, Bart, Absil, Olivier, Barrado, David, Cossou, Christophe, Decin, Leen, Glauser, Adrian M., Pye, John, Olofsson, Goran, Glasse, Alistair, Lahuis, Fred, and Patapis, Polychronis
Subjects: NATURAL satellite atmospheres, GAS giants, PLANETARY atmospheres, IMAGING systems, PLANETARY systems
Abstract: Context. Mid-infrared imaging of exoplanets and disks is now possible with the coronographs of the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST). This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characterizing the atmosphere of young giant exoplanets and associated disks. Aims. These observations aim to characterize the atmosphere of the planet HD 95086 b by adding mid-infrared information so that the various hypotheses about its atmospheric parameters values can be unraveled. Improved images of cirsumstellar disks are provided. Methods. We present the MIRI coronagraphic imaging of the system HD 95086 obtained with the F1065C, F1140, and F2300C filters at central wavelengths of 10.575 µm, 11.3 µm, and 23 µm, respectively. We explored the method for subtracting the stellar diffraction pattern in the particular case when bright dust emitting at short separation is present. Furthermore, we compared different methods for extracting the photometry of the planet. Using the atmospheric models Exo-REM and ATMO, we measured the atmospheric parameters of HD 95086 b. Results. The planet HD 95086 b is detected at the two shortest MIRI wavelengths F1065C and F1140C. The contribution from the inner disk of the system is also detected. It is similar to that in the HR 8799 system. The outer colder belt is imaged at 23 µm. Background objects are observed in all filters. The mid-infrared photometry provides better constraints on the atmospheric parameters. We evaluate a temperature of 800–1050 K, consistent with one previous hypothesis that only used near-infrared data. The radius measurement of 1.0–1.14 RJup is better aligned with evolutionary models, but still smaller than predicted. These observations allow us to refute the hypothesis of a warm circumplanetary disk. Conclusions. HD 95086 is one of the first exoplanetary systems to be revealed at mid-infrared wavelengths. This highlights the interests and challenges of observations at these wavelengths. [ABSTRACT FROM AUTHOR]
Published: 2024
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9. Probing the dynamical and kinematical structures of detached shells around AGB stars.

Author: Maercker, M., De Beck, E., Khouri, T., Vlemmings, W. H. T., Gustafsson, J., Olofsson, H., Tafoya, D., Kerschbaum, F., and Lindqvist, M.
Subjects: CIRCUMSTELLAR matter, ASYMPTOTIC giant branch stars, STELLAR evolution, HYDRODYNAMICS, RELATIVE velocity
Abstract: Context. The chemical evolution of asymptotic giant branch (AGB) stars is driven by repeated thermal pulses (TPs). The duration of a TP is only a few hundred years, whereas an inter-pulse period lasts 104 − 105 yr. Direct observations of TPs are hence unlikely. However, the detached shells seen in CO line emission that are formed as a result of a TP provide indirect constraints on the changes experienced by the star during the pulse. Aims. We aim to resolve the spatial and kinematic sub-structures in five detached-shell sources to provide detailed constraints for hydrodynamic models that describe the formation and evolution of the shells. Methods. We used observations of the 12CO (1 − 0) emission towards five carbon-AGB stars with ALMA (Atacama Large Millimeter/submillimeter Array), including previously published observations of the carbon AGB star U Ant. The data have angular resolutions of 0″.3 to 1″ and a velocity resolution of 0.3 km s−1. This enabled us to quantify spatial and kinematic structures in the shells. Combining the ALMA data with single-dish observations of the 12CO (1 − 0) to 12CO (4 − 3) emission towards the sources, we used radiative transfer models to compare the observed structures with previous estimates of the shell masses and temperatures. Results. The observed emission is separated into two distinct components: a more coherent, bright outer shell and a more filamentary, fainter inner shell. The kinematic information shows that the inner sub-shells move at a higher velocity relative to the outer sub-shells. The observed sub-structures reveal a negative velocity gradient outwards across the detached shells, confirming the predictions from hydrodynamical models. However, the models do not predict a double-shell structure, and the CO emission likely only traces the inner and outer edges of the shell, implying a lack of CO in the middle layers of the detached shell. Previous estimates of the masses and temperatures are consistent with originating mainly from the brighter subshell, but the total shell masses are likely lower limits. Also, additional structures in the form of partial shells outside the detached shell around V644 Sco, arcs within the shell of R Scl, and a partially filled shell for DR Ser indicate a more complicated evolution of the shells and mass-loss process throughout the TP cycle than previously assumed. Conclusions. The observed spatial and kinematical splittings of the shells appear consistent with results from the hydrodynamical models, provided the CO emission does not trace the H2 density distribution in the shell but rather traces the edges of the shells. The hydrodynamical models predict very different density profiles depending on the evolution of the shells and the different physical processes involved in the wind-wind interaction (e.g. heating and cooling processes). It is therefore not possible to constrain the total shell mass based on the CO observations alone. Additional features outside and inside the shells complicate the interpretation of the data. Complementary observations of, for example, CI as a dissociation product of CO would be necessary to understand the distribution of CO compared to H2, in addition to new detailed hydrodynamical models of the pre-pulse, pulse, and post-pulse wind. Only a comprehensive combination of observations and models will allow us to constrain the evolution of the shells and the changes in the star during the thermal-pulse cycle. [ABSTRACT FROM AUTHOR]
Published: 2024
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10. MINDS: Mid-infrared atomic and molecular hydrogen lines in the inner disk around a low-mass star.

Author: Franceschi, Riccardo, Henning, Thomas, Tabone, Benoît, Perotti, Giulia, Caratti o Garatti, Alessio, Bettoni, Giulio, van Dishoeck, Ewine F., Kamp, Inga, Absil, Olivier, Güdel, Manuel, Olofsson, Göran, Waters, L. B. F. M., Arabhavi, Aditya M., Christiaens, Valentin, Gasman, Danny, Grant, Sierra L., Jang, Hyerin, Rodgers-Lee, Donna, Samland, Matthias, and Schwarz, Kamber
Subjects: ATOMIC hydrogen, ATOMIC spectra, LOW mass stars, ACCRETION disks, MOLECULAR spectra
Abstract: Context. Understanding the physical conditions of circumstellar material around young stars is crucial to star and planet formation studies. In particular, very low-mass stars (M★ < 0.2 M⊙) are interesting sources to characterize as they are known to host a diverse population of rocky planets. Molecular and atomic hydrogen lines can probe the properties of the circumstellar gas. Aims. This work aims to measure the mass accretion rate, the accretion luminosity, and more generally the physical conditions of the warm emitting gas in the inner disk of the very low-mass star 2MASS-J16053215-1933159. We investigate the source mid-infrared spectrum for atomic and molecular hydrogen line emission. Methods. We present the full James Webb Space Telescope (JWST) Mid-InfraRed Instrument (MIRI) Medium Resolution Spectrometer (MRS) spectrum of the protoplanetary disk around the very low-mass star 2MASS-J16053215-1933159 from the MINDS GTO program, previously shown to be abundant in hydrocarbon molecules. We analyzed the atomic and molecular hydrogen lines in this source by fitting one or multiple Gaussian profiles. We then built a rotational diagram for the H2 lines to constrain the rotational temperature and column density of the gas. Finally, we compared the observed atomic line fluxes to predictions from two standard emission models. Results. We identify five molecular hydrogen pure rotational lines and 16 atomic hydrogen recombination lines in the 5–20 µm spectral range. The spectrum indicates optically thin emission for both species. We use the molecular hydrogen lines to constrain the mass and temperature of the warm emitting gas. We derive a total gas mass of only 2.3 × 10−5 MJup and a temperature of 635 K for the warm H2 gas component located in the very inner disk (r < 0.033 au), which only accounts for a small fraction of the upper limit for the disk mass from continuum observations (0.2 MJup). The HI (7−6) recombination line is used to measure the mass accretion rate (4.0 × 10−10M⊙ yr−1) and luminosity (3.1 × 10−3L⊙) onto the central source. This line falls close to the HI (11−8) line, however at the spectral resolution of JWST MIRI we managed to measure both separately. Previous studies based on Spitzer have measured the combined flux of both lines to measure accretion rates. HI recombination lines can also be used to derive the physical properties of the gas using atomic recombination models. The model predictions of the atomic line relative intensities constrain the atomic hydrogen density to about 109−1010 cm−3 and temperatures up to 5000 K. Conclusions. The JWST-MIRI MRS observations for the very low-mass star 2MASS-J16053215-1933159 reveal a large number of emission lines, many originating from atomic and molecular hydrogen because we are able to look into the disk warm molecular layer. Their analysis constrains the physical properties of the emitting gas and showcases the potential of JWST to deepen our understanding of the physical and chemical structure of protoplanetary disks. [ABSTRACT FROM AUTHOR]
Published: 2024
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11. The polarisation properties of the HD 18327 debris ring. Evidence for sub-micron particles from scattered light observations

Author: Milli, J., primary, Choquet, E., additional, Tazaki, R., additional, Menard, F., additional, Augereau, J.-C., additional, Olofsson, J., additional, Th'ebault, P., additional, Poch, O., additional, Levasseur-Regourd, A.-C., additional, Lasue, J., additional, Renard, J.B., additional, Hadamcik, E., additional, Baruteau, C., additional, Schmid, H.M., additional, Engler, N., additional, van Holstein, R.G., additional, Zubko, E., additional, Lagrange, A.M., additional, Marino, S., additional, Pinte, C., additional, Dominik, C., additional, Boccaletti, A., additional, Langlois, M., additional, Zurlo, A., additional, Desgrange, C., additional, Gluck, L., additional, Mouillet, D., additional, Costille, A., additional, and Sauvage, J.F., additional
Published: 2023
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12. Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley

Author: Bonfanti, A., primary, Brady, M., additional, Wilson, T.G., additional, Venturini, J., additional, Egger, J.A., additional, Brandeker, A., additional, Sousa, S.G., additional, Lendl, M., additional, Simon, A.E., additional, Queloz, D., additional, Olofsson, G., additional, Adibekyan, V., additional, Alibert, Y., additional, Fossati, L., additional, Hooton, M.J., additional, Kubyshkina, D., additional, Luque, R., additional, Murgas, F., additional, Mustill, A.J., additional, Santos, N.C., additional, Van Grootel, V., additional, Alonso, R., additional, Asquier, J., additional, Bandy, T., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S.C., additional, Baumjohann, W., additional, Bean, J., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Bergomi, M., additional, Billot, N., additional, Borsato, L., additional, Broeg, C., additional, Collier Cameron, A., additional, Csizmadia, Sz., additional, Cubillos, P.E., additional, Davies, M.B., additional, Deleuil, M., additional, Deline, A., additional, Delrez, L., additional, Demangeon, O.D.S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Fortier, A., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Günther, M.N., additional, Heitzmann, A., additional, Helling, Ch., additional, Hoyer, S., additional, Isaak, K.G., additional, Kasper, D., additional, Kiss, L., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Magrin, D., additional, Maxted, P.F.L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Scandariato, G., additional, Ségransan, D., additional, Seifahrt, A., additional, Smith, A.M.S., additional, Stalport, M., additional, Stefánsson, G., additional, Steinberger, M., additional, Stürmer, J., additional, Szabó, M. Gy., additional, Thomas, N., additional, Udry, S., additional, Villaver, E., additional, Walton, N.A., additional, Westerdorff, K., additional, and Zingales, T., additional
Published: 2023
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13. cheops observations of An aligned orbit and signs of variability from a reflective day side.

Author: Singh, V., primary, Scandariato, G., additional, Smith, A.M.S., additional, Cubillos, P.E., additional, Lendl, M., additional, Billot, N., additional, Fortier, A., additional, Queloz, D., additional, Sousa, S.G., additional, Csizmadia, Sz., additional, Brandeker, A., additional, Carone, L., additional, Wilson, T.G., additional, Akinsanmi, B., additional, Patel, J.A., additional, Krenn, A., additional, Demangeon, O.D.S., additional, Bruno, G., additional, Pagano, I., additional, Hooton, M.J., additional, Cabrera, J., additional, Santos, N.C., additional, Alibert, Y., additional, Alonso, R., additional, Asquier, J., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S.C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Bergomi, M., additional, Bonfanti, A., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Charnoz, S., additional, Collier Cameron, A., additional, Davies, M.B., additional, Deleuil, M., additional, Deline, A., additional, Delrez, L., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Günther, M.N., additional, Harre, J.-V., additional, Heitzmann, A., additional, Helling, Ch., additional, Hoyer, S., additional, Isaak, K.G., additional, Kiss, L., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Magrin, D., additional, Maxted, P.F.L., additional, Mischler, H., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Salmon, S., additional, Ségransan, D., additional, Simon, A.E., additional, Stalport, M., additional, Steinberger, M., additional, Szabó, M. Gy., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Venturini, J., additional, Villaver, E., additional, Walton, N.A., additional, and Zingales, T., additional
Published: 2023
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14. Constraining the reflective properties of using CHEOPS photometry

Author: Pagano, I., primary, Scandariato, G., additional, Singh, V., additional, Lendl, M., additional, Queloz, D., additional, Simon, A.E., additional, Sousa, S.G., additional, Brandeker, A., additional, Collier Cameron, A., additional, Sulis, S., additional, Van Grootel, V., additional, Wilson, T.G., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S.C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Bruno, G., additional, Carone, L., additional, Charnoz, S., additional, Corral van Damme, C., additional, Csizmadia, Sz., additional, Cubillos, P.E., additional, Davies, M.B., additional, Deleuil, M., additional, Deline, A., additional, Delrez, L., additional, Demangeon, O.D.S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Günther, M.N., additional, Helling, Ch., additional, Hoyer, S., additional, Isaak, K.G., additional, Kiss, L., additional, Kopp, E., additional, Lam, K.W.F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Magrin, D., additional, Maxted, P.F.L., additional, Mordasini, C., additional, Munari, M., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Reimers, C., additional, Ribas, I., additional, Rieder, M., additional, Santos, N.C., additional, Ségransan, D., additional, Smith, A.M.S., additional, Stalport, M., additional, Steller, M., additional, Szabó, M. Gy., additional, Thomas, N., additional, Udry, S., additional, Venturini, J., additional, and Walton, N.A., additional
Published: 2023
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15. MINDS

Author: Gasman, Danny, primary, van Dishoeck, Ewine F., additional, Grant, Sierra L., additional, Temmink, Milou, additional, Tabone, Benoît, additional, Henning, Thomas, additional, Kamp, Inga, additional, Güdel, Manuel, additional, Lagage, Pierre-Olivier, additional, Perotti, Giulia, additional, Christiaens, Valentin, additional, Samland, Matthias, additional, Arabhavi, Aditya M., additional, Argyriou, Ioannis, additional, Abergel, Alain, additional, Absil, Olivier, additional, Barrado, David, additional, Boccaletti, Anthony, additional, Bouwman, Jeroen, additional, Caratti o Garatti, Alessio, additional, Geers, Vincent, additional, Glauser, Adrian M., additional, Guadarrama, Rodrigo, additional, Jang, Hyerin, additional, Kanwar, Jayatee, additional, Lahuis, Fred, additional, Morales-Calderón, Maria, additional, Mueller, Michael, additional, Nehmé, Cyrine, additional, Olofsson, Göran, additional, Pantin, Éric, additional, Pawellek, Nicole, additional, Ray, Tom P., additional, Rodgers-Lee, Donna, additional, Scheithauer, Silvia, additional, Schreiber, Jürgen, additional, Schwarz, Kamber, additional, Vandenbussche, Bart, additional, Vlasblom, Marissa, additional, Waters, Rens L. B. F. M., additional, Wright, Gillian, additional, Colina, Luis, additional, Greve, Thomas R., additional, and Östlin, Göran, additional
Published: 2023
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16. CHEOPS and TESS view of the ultra-short-period super-Earth TOI-561 b

Author: Patel, J. A., primary, Egger, J. A., additional, Wilson, T. G., additional, Bourrier, V., additional, Carone, L., additional, Beck, M., additional, Ehrenreich, D., additional, Sousa, S. G., additional, Benz, W., additional, Brandeker, A., additional, Deline, A., additional, Alibert, Y., additional, Lam, K. W. F., additional, Lendl, M., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, T., additional, Billot, N., additional, Bonfils, X., additional, Broeg, C., additional, Busch, M.-D., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Csizmadia, Sz., additional, Davies, M. B., additional, Deleuil, M., additional, Delrez, L., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Heng, K., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Kopp, E., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Ratti, F., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Viotto, V., additional, and Walton, N. A., additional
Published: 2023
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17. Extended far-UV emission surrounding asymptotic giant branch stars as seen by GALEX

Author: Răstău, V., primary, Mečina, M., additional, Kerschbaum, F., additional, Olofsson, H., additional, Maercker, M., additional, Drechsler, M., additional, Strottner, X., additional, and Mulato, L., additional
Published: 2023
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18. Refining the properties of the TOI-178 system with CHEOPS and TESS

Author: Delrez, L., primary, Leleu, A., additional, Brandeker, A., additional, Gillon, M., additional, Hooton, M. J., additional, Collier Cameron, A., additional, Deline, A., additional, Fortier, A., additional, Queloz, D., additional, Bonfanti, A., additional, Van Grootel, V., additional, Wilson, T. G., additional, Egger, J. A., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Asquier, J., additional, Bárczy, T., additional, Barrado y Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Bonfıls, X., additional, Borsato, L., additional, Broeg, C., additional, Buder, M., additional, Cabrera, J., additional, Cessa, V., additional, Charnoz, S., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Güdel, M., additional, Hasiba, J., additional, Hoyer, S., additional, Isaak, K. G., additional, Jenkins, J. M., additional, Kiss, L. L., additional, Laskar, J., additional, Latham, D. W., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Lovis, C., additional, Luque, R., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Ricker, G., additional, Santos, N. C., additional, Scandariato, G., additional, Seager, S., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Sousa, S. G., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Vanderspek, R., additional, Venturini, J., additional, Viotto, V., additional, Walton, N. A., additional, and Winn, J. N., additional
Published: 2023
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19. Are radiators ready for the challenges of the future: A review of advancements in radiators

Author: Puttige Anjan Rao, Feng Kailun, Lu Weizhuo, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: Radiators play an important role in providing a comfortable and safe indoor environment while maintaining high-energy efficiency. In the perspective of future climate change with expected larger temperature fluctuations and the rapidly changing heat supply and demand, it is required that the current radiator technology is adaptable. The heat supply is changing towards a lower supply temperature to enable an increase in energy efficiency and an increase in the share of renewable energy. Simultaneously, both the heat supply and demand are expected to have more variations in the future. An additional concern that has come into more focus after the experience with the COVID 19 pandemic is the prevention of the spread of infection in indoor environments. Researchers have extensively studied several innovations in radiator technologies and their deployment that addresses these challenges. Some of the solutions available in the literature include floor heating, ceiling heating, ventilation radiator, stratum ventilation. Researchers have used advanced modeling and experimental techniques to understand how to deploy different types of radiator technologies. This review summarizes solutions in the literature that address these challenges and identifies knowledge gaps that need to be addressed. In particular, this study explores the gaps in knowledge of practical issues, such as the position of furniture and the position of people, which have received less attention in the literature. Research that addresses the effect of radiators on ventilation and a healthy indoor environment is also of particular interest in this review.
Published: 2022
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20. Phase change materials influence on temperature variatio buildings

Author: Zhou Hongxia, Andersson André, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: For the design of sustainable buildings, it is crucial with accurate methods to evaluate how alternative constructions will influence thermal comfort, as well as energy efficiency. This study introduces a model to investigate how the use of phase change materials (PCM)in building envelopes can influence the temperature stratification, which also influences the indoor thermal comfort. PCM is characterized by large latent heat in the melting/solidifying process during phase transition. Applications with PCM have been recognized as possible alternatives in building envelopes to improve thermal comfort as well as energy efficiency. The selection of the properties of the PCM, as well as how and where the PCM was installed in the building envelope, are crucial factors to be considered before application in practice. In this study, a simplified experimental set-up including a hot-box was used. The PCM material Climsel28 with different layers thicknesses was installed in the sidewall of a hot-box. Extruded polystyrene (XPS) foam boards were used as wall insulation material in the study. XPS was installed as a reference case and in different layer combinations with the PCM. The sequence of the XPS and PCM was varied. Temperature and heat flux were measured in different positions of the hot-box and on the tested walls. A 3D COMSOL model was developed to study the thermal performance of the system. The model was validated in the study using the collected experimental data. The results indicated that the developed COMSOL model can reasonably predict the performance of the system, both with and without the incorporation of PCM. Additionally, the measured temperature stratification were theoretically validated by the COMSOL model. The study gives indicative guidance of how PCMs can be installed in building constructions elements to reduce temperature peak loads and thus also contributing to an improvement of the indoor thermal comfort.
Published: 2022
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21. Preface

Author: Li A., Olofsson T., and Kosonen R.
Subjects: Environmental sciences, GE1-350
Published: 2022
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22. Energy-efficient retrofitting with incomplete building information: a data-driven approach

Author: Feng Kailun, Lu Weizhuo, Reddy Penaka Santhan, Eklund Erik, Andersson Staffan, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: The high-performance insulations and energy-efficient HVAC have been widely employed as energy-efficient retrofitting for building renovation. Building performance simulation (BPS) based on physical models is a popular method to estimate expected energy savings for building retrofitting. However, many buildings, especially the older building constructed several decades ago, do not have full access to complete information for a BPS method. To address this challenge, this paper proposes a data-driven approach to support the decision-making of building retrofitting under incomplete information. The data-driven approach is constructed by integrating backpropagation neural networks (BRBNN), fuzzy C-means clustering (FCM), principal component analysis (PCA), and trimmed scores regression (TSR). It is motivated by the available big data sources from real-life building performance datasets to directly model the retrofitting performances without generally missing information, and simultaneously impute the case-specific incomplete information. This empirical study is conducted on real-life buildings in Sweden. The result indicates that the approach can model the performance ranges of energy-efficient retrofitting for family houses with more than 90% confidence. The developed approach provides a tool to predict the performance of individual buildings from different retrofitting measures, enabling supportive decision-making for building owners with inaccessible complete building information, to compare alternative retrofitting measures.
Published: 2022
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23. An empirical view of the extended atmosphere and inner envelope of the asymptotic giant branch star R Doradus: I. Physical model based on CO lines.

Author: Khouri, T., Olofsson, H., Vlemmings, W. H. T., Schirmer, T., Tafoya, D., Maercker, M., De Beck, E., Nyman, L.-Å., and Saberi, M.
Subjects: *ASYMPTOTIC giant branch stars, *STELLAR oscillations, *STELLAR atmospheres, *SUBMILLIMETER astronomy, *STARS, *TEMPERATURE distribution, *MASS loss (Astrophysics)
Abstract: Context. The mass loss experienced on the asymptotic giant branch (AGB) at the end of the lives of low- and intermediate-mass stars is widely accepted to rely on radiation pressure acting on newly formed dust grains. Dust formation happens in the extended atmospheres of these stars, where the density, velocity, and temperature distributions are strongly affected by convection, stellar pulsation, and heating and cooling processes. The interaction between these processes and how that affects dust formation and growth is complex. Hence, characterising the extended atmospheres empirically is paramount to advance our understanding of the dust formation and wind-driving processes. Aims. We aim to determine the density, temperature, and velocity distributions of the gas in the extended atmosphere of the AGB star R Dor. Methods. We acquired observations using ALMA towards R Dor to study the gas through molecular line absorption and emission. We modelled the observed 12CO v = 0, J = 2 − 1, v = 1, J = 2 − 1, and 3 − 2 and 13CO v = 0, J = 3 − 2 lines using the 3D radiative transfer code LIME to determine the density, temperature, and velocity distributions up to a distance of four times the radius of the star at sub-millimetre wavelengths. Results. The high angular resolution of the sub-millimetre maps allows for even the stellar photosphere to be spatially resolved. By analysing the absorption against the star, we infer that the innermost layer in the near-side hemisphere is mostly falling towards the star, while gas in the layer above that seems to be mostly outflowing. Interestingly, the high angular resolution of the ALMA Band 7 observations reveal that the velocity field of the gas seen against the star is not homogenous across the stellar disc. The gas temperature and density distributions have to be very steep close to the star to fit the observed emission and absorption, but they become shallower for radii larger than ∼1.6 times the stellar sub-millimetre radius. While the gas mass in the innermost region is hundreds of times larger than the mass lost on average by R Dor per pulsation cycle, the gas densities just above this region are consistent with those expected based on the mass-loss rate and expansion velocity of the large-scale outflow. Our fits to the line profiles require the velocity distribution on the far side of the envelope to be mirrored, on average, with respect to that on the near side. Using a sharp absorption feature seen in the CO v = 0, J = 2 − 1 line, we constrained the standard deviation of the stochastic velocity distribution in the large-scale outflow to be ≲0.4 km s−1. We characterised two blobs detected in the CO v = 0, J = 2 − 1 line and found densities substantially larger than those of the surrounding gas. The two blobs also display expansion velocities that are high relative to that of the large-scale outflow. Monitoring the evolution of these blobs will lead to a better understanding of the role of these structures in the mass-loss process of R Dor. [ABSTRACT FROM AUTHOR]
Published: 2024
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24. The first scattered light images of HD 112810, a faint debris disk in the Sco-Cen association

Author: Matthews, E. C., primary, Bonnefoy, M., additional, Xie, C., additional, Desgrange, C., additional, Desidera, S., additional, Delorme, P., additional, Milli, J., additional, Olofsson, J., additional, Barbato, D., additional, Ceva, W., additional, Augereau, J.-C., additional, Biller, B. A., additional, Chen, C. H., additional, Faramaz-Gorka, V., additional, Galicher, R., additional, Hinkley, S., additional, Lagrange, A.-M., additional, Ménard, F., additional, Pinte, C., additional, and Stapelfeldt, K. R., additional
Published: 2023
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25. An inner warp discovered in the disk around HD110058 using VLT/SPHERE and HST/STIS

Author: Stasevic, S., primary, Milli, J., additional, Mazoyer, J., additional, Lagrange, A.-M., additional, Bonnefoy, M., additional, Faramaz-Gorka, V., additional, Ménard, F., additional, Boccaletti, A., additional, Choquet, E., additional, Shuai, L., additional, Olofsson, J., additional, Chomez, A., additional, Ren, B., additional, Rubini, P., additional, Desgrange, C., additional, Gratton, R., additional, Chauvin, G., additional, Vigan, A., additional, and Matthews, E., additional
Published: 2023
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26. Investigating the visible phase-curve variability of 55 Cnc e

Author: Meier Valdés, E. A., primary, Morris, B. M., additional, Demory, B.-O., additional, Brandeker, A., additional, Kitzmann, D., additional, Benz, W., additional, Deline, A., additional, Florén, H.-G., additional, Sousa, S. G., additional, Bourrier, V., additional, Singh, V., additional, Heng, K., additional, Strugarek, A., additional, Bower, D. J., additional, Jäggi, N., additional, Carone, L., additional, Lendl, M., additional, Jones, K., additional, Oza, A. V., additional, Demangeon, O. D. S., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Asquier, J., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Billot, N., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Delrez, L., additional, Ehrenreich, D., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Günther, M. N., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Sarajlic, M., additional, Scandariato, G., additional, Ségransan, D., additional, Sicilia, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Venturini, J., additional, Walton, N. A., additional, Wilson, T. G., additional, and Wolter, D., additional
Published: 2023
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27. Shear, writhe, and filaments: Turbulence in the high-latitude molecular cloud MBM 40

Author: Monaci, Marco, primary, Magnani, Loris, additional, Shore, Steven N., additional, Olofsson, Henrik, additional, and Joy, Mackenzie R., additional
Published: 2023
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28. The planetary system around HD 190622 (TOI-1054)

Author: Cabrera, J., primary, Gandolfi, D., additional, Serrano, L. M., additional, Csizmadia, Sz., additional, Egger, J. A., additional, Baumeister, Ph., additional, Krenn, A., additional, Benz, W., additional, Deline, A., additional, Florén, H.-G., additional, Collier Cameron, A., additional, Adibekyan, V., additional, Alibert, Y., additional, Bellomo, S. E., additional, Delrez, L., additional, Fossati, L., additional, Fortier, A., additional, Grziwa, S., additional, Hoyer, S., additional, Bonfanti, A., additional, Salmon, S., additional, Sousa, S. G., additional, Wilson, T. G., additional, Alarcón, J., additional, Alonso, R., additional, Anglada Escudé, G., additional, Bárczy, T., additional, Barragán, O., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Bernabò, L. M., additional, Billot, N., additional, Bonfils, X., additional, Borsato, L., additional, Brandeker, A., additional, Broeg, C., additional, Carrión-González, O., additional, Charnoz, S., additional, Ciardi, D. R., additional, Cochran, W. D., additional, Collins, K. A., additional, Collins, K. I., additional, Conti, D. M., additional, Davies, M. B., additional, Deeg, H. J., additional, Deleuil, M., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Esposito, M., additional, Fridlund, M., additional, Gillon, M., additional, Goffo, E., additional, Güdel, M., additional, Guenther, E. W., additional, Harre, J.-V., additional, Heng, K., additional, Hooton, M. J., additional, Isaak, K. G., additional, Jenkins, J. M., additional, Kiss, L. L., additional, Knudstrup, E., additional, Lam, K. W. F., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Lovis, C., additional, Luque, R., additional, Magrin, D., additional, Maxted, P. F. L., additional, Muresan, A., additional, Nascimbeni, V., additional, Olofsson, G., additional, Osborn, H. P., additional, Osborne, H. L. M., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Persson, C. M., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Redfield, S., additional, Ribas, I., additional, Ricker, G. R., additional, Rodler, F., additional, Santos, N. C., additional, Scandariato, G., additional, Seager, S., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Tosi, N., additional, Twicken, J. D., additional, Udry, S., additional, Van Eylen, V., additional, Van Grootel, V., additional, Walton, N. A., additional, and Winn, J. N., additional
Published: 2023
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29. TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS

Author: Ulmer-Moll, S; https://orcid.org/0000-0003-2417-7006, Osborn, H P; https://orcid.org/0000-0002-4047-4724, Tuson, A; https://orcid.org/0000-0002-2830-9064, Egger, J A; https://orcid.org/0000-0003-1628-4231, Lendl, M; https://orcid.org/0000-0001-9699-1459, Maxted, P; https://orcid.org/0000-0003-3794-1317, Bekkelien, A, Simon, A E; https://orcid.org/0000-0001-9773-2600, Olofsson, G; https://orcid.org/0000-0003-3747-7120, Adibekyan, V; https://orcid.org/0000-0002-0601-6199, Alibert, Y; https://orcid.org/0000-0002-4644-8818, Bonfanti, A; https://orcid.org/0000-0002-1916-5935, Bouchy, F, Brandeker, A; https://orcid.org/0000-0002-7201-7536, Fridlund, M; https://orcid.org/0000-0002-0855-8426, Gandolfi, D; https://orcid.org/0000-0001-8627-9628, Mordasini, C, Persson, C M; https://orcid.org/0000-0003-1257-5146, Salmon, S; https://orcid.org/0000-0002-1714-3513, Serrano, L M; https://orcid.org/0000-0001-9211-3691, Sousa, S G; https://orcid.org/0000-0001-9047-2965, Wilson, T G; https://orcid.org/0000-0001-8749-1962, Rieder, M, Hasiba, J, Asquier, J, Sicilia, D; https://orcid.org/0000-0001-7851-5168, Walter, I; https://orcid.org/0000-0002-5839-1521, Alonso, R; https://orcid.org/0000-0001-8462-8126, Anglada, G; https://orcid.org/0000-0002-3645-5977, Barrado y Navascues, D; https://orcid.org/0000-0002-5971-9242, et al, Ulmer-Moll, S; https://orcid.org/0000-0003-2417-7006, Osborn, H P; https://orcid.org/0000-0002-4047-4724, Tuson, A; https://orcid.org/0000-0002-2830-9064, Egger, J A; https://orcid.org/0000-0003-1628-4231, Lendl, M; https://orcid.org/0000-0001-9699-1459, Maxted, P; https://orcid.org/0000-0003-3794-1317, Bekkelien, A, Simon, A E; https://orcid.org/0000-0001-9773-2600, Olofsson, G; https://orcid.org/0000-0003-3747-7120, Adibekyan, V; https://orcid.org/0000-0002-0601-6199, Alibert, Y; https://orcid.org/0000-0002-4644-8818, Bonfanti, A; https://orcid.org/0000-0002-1916-5935, Bouchy, F, Brandeker, A; https://orcid.org/0000-0002-7201-7536, Fridlund, M; https://orcid.org/0000-0002-0855-8426, Gandolfi, D; https://orcid.org/0000-0001-8627-9628, Mordasini, C, Persson, C M; https://orcid.org/0000-0003-1257-5146, Salmon, S; https://orcid.org/0000-0002-1714-3513, Serrano, L M; https://orcid.org/0000-0001-9211-3691, Sousa, S G; https://orcid.org/0000-0001-9047-2965, Wilson, T G; https://orcid.org/0000-0001-8749-1962, Rieder, M, Hasiba, J, Asquier, J, Sicilia, D; https://orcid.org/0000-0001-7851-5168, Walter, I; https://orcid.org/0000-0002-5839-1521, Alonso, R; https://orcid.org/0000-0001-8462-8126, Anglada, G; https://orcid.org/0000-0002-3645-5977, Barrado y Navascues, D; https://orcid.org/0000-0002-5971-9242, and et al
Abstract: Context. A large sample of long-period giant planets has been discovered thanks to long-term radial velocity surveys, but only a few dozen of these planets have a precise radius measurement. Transiting gas giants are crucial targets for the study of atmospheric composition across a wide range of equilibrium temperatures and, more importantly, for shedding light on the formation and evolution of planetary systems. Indeed, compared to hot Jupiters, the atmospheric properties and orbital parameters of cooler gas giants are unaltered by intense stellar irradiation and tidal effects. Aims. We aim to identify long-period planets in the Transiting Exoplanet Survey Satellite (TESS) data as single or duo-transit events. Our goal is to solve the orbital periods of TESS duo-transit candidates with the use of additional space-based photometric observations and to collect follow-up spectroscopic observations in order to confirm the planetary nature and measure the mass of the candidates. Methods. We use the CHaracterising ExOPlanet Satellite (CHEOPS) to observe the highest-probability period aliases in order to discard or confirm a transit event at a given period. Once a period is confirmed, we jointly model the TESS and CHEOPS light curves along with the radial velocity datasets to measure the orbital parameters of the system and obtain precise mass and radius measurements. Results. We report the discovery of a long-period transiting Neptune-mass planet orbiting the G7-type star TOI-5678. Our spectroscopic analysis shows that TOI-5678 is a star with a solar metallicity. The TESS light curve of TOI-5678 presents two transit events separated by almost two years. In addition, CHEOPS observed the target as part of its Guaranteed Time Observation program. After four non-detections corresponding to possible periods, CHEOPS detected a transit event matching a unique period alias. Follow-up radial velocity observations were carried out with the ground-based high-resolution spectrograph
Published: 2023

30. Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley.

Author: Bonfanti, A., Brady, M., Wilson, T. G., Venturini, J., Egger, J. A., Brandeker, A., Sousa, S. G., Lendl, M., Simon, A. E., Queloz, D., Olofsson, G., Adibekyan, V., Alibert, Y., Fossati, L., Hooton, M. J., Kubyshkina, D., Luque, R., Murgas, F., Mustill, A. J., and Santos, N. C.
Subjects: MARKOV chain Monte Carlo, MONTE Carlo method, OUTER planets, VALLEYS, SUPPORT vector machines
Abstract: Context. TOI-732 is an M dwarf hosting two transiting planets that are located on the two opposite sides of the radius valley. Inferring a reliable demographics for this type of systems is key to understanding their formation and evolution mechanisms. Aims. By doubling the number of available space-based observations and increasing the number of radial velocity (RV) measurements, we aim at refining the parameters of TOI-732 b and c. We also use the results to study the slope of the radius valley and the density valley for a well-characterised sample of M-dwarf exoplanets. Methods. We performed a global Markov chain Monte Carlo analysis by jointly modelling ground-based light curves and CHEOPS and TESS observations, along with RV time series both taken from the literature and obtained with the MAROON-X spectrograph. The slopes of the M-dwarf valleys were quantified via a support vector machine (SVM) procedure. Results. TOI-732b is an ultrashort-period planet (P = 0.76837931-0.00000042+0.0000039 days) with a radius Rb = 1.325-0.058+0.057R⊕, a mass Mb = 2.46 ± 0.19 M⊕, and thus a mean density ρb = 5.8-0.8+1.0 g cm-3, while the outer planet at P = 12.252284 ± 0.000013 days has Rc = 2.39-0.11+0.10R⊕, Mc = 8.04-0.48+0.50M⊕, and thus ρc = 3.24-0.43+0.55 g cm-3. Even with respect to the most recently reported values, this work yields uncertainties on the transit depths and on the RV semi-amplitudes that are smaller up to a factor of ~1.6 and ~2.4 for TOI-732 b and c, respectively. Our calculations for the interior structure and the location of the planets in the mass-radius diagram lead us to classify TOI-732 b as a super-Earth and TOI-732 c as a mini-Neptune. Following the SVM approach, we quantified d log Rp,valley / d logP = -0.065-0.013+0.024, which is flatter than for Sun-like stars. In line with former analyses, we note that the radius valley for M-dwarf planets is more densely populated, and we further quantify the slope of the density valley as d log ρ^valley / d log P = -0.02-0.04+0.12. Conclusions. Compared to FGK stars, the weaker dependence of the position of the radius valley on the orbital period might indicate that the formation shapes the radius valley around M dwarfs more strongly than the evolution mechanisms. [ABSTRACT FROM AUTHOR]
Published: 2024
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31. The β Pictoris system: Setting constraints on the planet and the disk structures at mid-IR wavelengths with NEAR

Author: Skaf, Nour, primary, Boccaletti, Anthony, additional, Pantin, Eric, additional, Thebault, Philippe, additional, Kral, Quentin, additional, Danielski, Camilla, additional, Galicher, Raphael, additional, Milli, Julien, additional, Lagrange, Anne-Marie, additional, Baruteau, Clément, additional, Kenworthy, Matthew, additional, Absil, Olivier, additional, Langlois, Maud, additional, Olofsson, Johan, additional, Chauvin, Gael, additional, Huelamo, Nuria, additional, Delorme, Philippe, additional, Charnay, Benjamin, additional, Guyon, Olivier, additional, Bonnefoy, Michael, additional, Cantalloube, Faustine, additional, Hoeijmakers, H. Jens, additional, Käufl, Ulli, additional, Kasper, Markus, additional, Maire, Anne-Lise, additional, Mâlin, Mathilde, additional, Siebenmorgen, Ralf, additional, Snellen, Ignas, additional, and Zins, Gérard, additional
Published: 2023
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32. TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS

Author: Ulmer-Moll, S., primary, Osborn, H. P., additional, Tuson, A., additional, Egger, J. A., additional, Lendl, M., additional, Maxted, P., additional, Bekkelien, A., additional, Simon, A. E., additional, Olofsson, G., additional, Adibekyan, V., additional, Alibert, Y., additional, Bonfanti, A., additional, Bouchy, F., additional, Brandeker, A., additional, Fridlund, M., additional, Gandolfi, D., additional, Mordasini, C., additional, Persson, C. M., additional, Salmon, S., additional, Serrano, L. M., additional, Sousa, S. G., additional, Wilson, T. G., additional, Rieder, M., additional, Hasiba, J., additional, Asquier, J., additional, Sicilia, D., additional, Walter, I., additional, Alonso, R., additional, Anglada, G., additional, Barrado y Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Bárczy, T., additional, Cabrera, J., additional, Charnoz, S., additional, Cointepas, M., additional, Cameron, A. Collier, additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Deline, A., additional, Delrez, L., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Dumusque, X., additional, Ehrenreich, D., additional, Eisner, N. L., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Gillon, M., additional, Grieves, N., additional, Güdel, M., additional, Hagelberg, J., additional, Helled, R., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Laskar, J., additional, des Etangs, A. Lecavelier, additional, Lovis, C., additional, Magrin, D., additional, Nascimbeni, V., additional, Otegi, J., additional, Ottensammer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Psaridi, A., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, G. M., additional, Ségransan, D., additional, Thomas, N., additional, Udry, S., additional, Van Grootel, V., additional, Venturini, J., additional, and Walton, N. A., additional
Published: 2023
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33. Refined parameters of the HD 22946 planetary system and the true orbital period of planet d

Author: Garai, Z., primary, Osborn, H. P., additional, Gandolfi, D., additional, Brandeker, A., additional, Sousa, S. G., additional, Lendl, M., additional, Bekkelien, A., additional, Broeg, C., additional, Cameron, A. Collier, additional, Egger, J. A., additional, Hooton, M. J., additional, Alibert, Y., additional, Delrez, L., additional, Fossati, L., additional, Salmon, S., additional, Wilson, T. G., additional, Bonfanti, A., additional, Tuson, A., additional, Ulmer-Moll, S., additional, Serrano, L. M., additional, Borsato, L., additional, Alonso, R., additional, Anglada, G., additional, Asquier, J., additional, Barrado y Navascues, D., additional, Barros, S. C. C., additional, Bárczy, T., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Biondi, F., additional, Bonfils, X., additional, Buder, M., additional, Cabrera, J., additional, Cessa, V., additional, Charnoz, S., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Van Eylen, V., additional, Fortier, A., additional, Fridlund, M., additional, Gillon, M., additional, Van Grootel, V., additional, Güdel, M., additional, Günther, M. N., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Kristiansen, M. H., additional, Laskar, J., additional, des Etangs, A. Lecavelier, additional, Lovis, C., additional, Luntzer, A., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Venturini, J., additional, and Walton, N., additional
Published: 2023
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34. A new dynamical modeling of the WASP-47 system with CHEOPS observations

Author: Nascimbeni, V., primary, Borsato, L., additional, Zingales, T., additional, Piotto, G., additional, Pagano, I., additional, Beck, M., additional, Broeg, C., additional, Ehrenreich, D., additional, Hoyer, S., additional, Majidi, F. Z., additional, Granata, V., additional, Sousa, S. G., additional, Wilson, T. G., additional, Van Grootel, V., additional, Bonfanti, A., additional, Salmon, S., additional, Mustill, A. J., additional, Delrez, L., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, T., additional, Benz, W., additional, Bergomi, M., additional, Billot, N., additional, Bonfils, X., additional, Brandeker, A., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Deline, A., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Erikson, A., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Isaak, K. G., additional, Kiss, L. L., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Lovis, C., additional, Luque, R., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mordasini, C., additional, Olofsson, G., additional, Ottensamer, R., additional, Pallé, E., additional, Peter, G., additional, Piazza, D., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Ratti, F., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steinberger, M., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Venturini, J., additional, Walton, N. A., additional, and Wolter, D., additional
Published: 2023
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35. Morphology of the gas-rich debris disk around HD 121617 with SPHERE observations in polarized light

Author: Perrot, Clément, primary, Olofsson, Johan, additional, Kral, Quentin, additional, Thébault, Philippe, additional, Montesinos, Matías, additional, Kennedy, Grant, additional, Bayo, Amelia, additional, Iglesias, Daniela, additional, van Holstein, Rob, additional, and Pinte, Christophe, additional
Published: 2023
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36. Apocenter pileup and arcs: A narrow dust ring around HD129590

Author: Olofsson, J., primary, Thébault, P., additional, Bayo, A., additional, Milli, J., additional, van Holstein, R. G., additional, Henning, Th., additional, Medina-Olea, B., additional, Godoy, N., additional, and Maucó, K., additional
Published: 2023
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37. A reinvestigation of debris disc halos

Author: Thébault, P., primary, Olofsson, J., additional, and Kral, Q., additional
Published: 2023
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38. Perspectives of building professionals on the use of LCA tools in Swedish climate declaration

Author: Nair Gireesh, Fransson Åke, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: From 1st January 2022, Swedish government plan to introduce the climate declarations as a legal requirement for new buildings. LCA is a method that could be used to quantify buildings’ climate impact. The climate declaration in the Swedish building code expects to create interest in LCA among stakeholders. This study aims to identify and understand the challenges and opportunities of using LCA by stakeholders during the early stage of construction process. The study is based on responses from six building professionals to a questionnaire. The policy implications of the study findings are discussed.
Published: 2021
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39. A multi-stakeholder perspective on opportunities and challenges for energy efficiency improvement in university buildings

Author: Nair Gireesh, Azizi Shoaib, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: University buildings are relatively energy-intensive. In Sweden, universities usually operate in rented buildings. In this study, interviews were carried out among three categories of stakeholders in a Swedish university to understand their perceptions of energy use and challenges to improve energy efficiency. As per most interviewees, the university’s top management and Akademiska Hus, which owns the buildings, have the main responsibility to reduce the buildings’ energy and carbon footprint. The heads of departments raised the concern on the non-availability of energy data to take actions to reduce energy use. The use of sensors and information technologies to monitor space use, energy use, and indoor environment are attractive to different stakeholders. The implications of the interview results are discussed.
Published: 2021
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40. Hint of an exocomet transit in the CHEOPS light curve of HD 172555

Author: Kiefer, Flavien, van Grootel, Valérie, Lecavelier Des Étangs, Alain, Szabó, Gy M., Brandeker, Alexis, Broeg, Christopher, Collier Cameron, Andrew, Deline, Adrien, Olofsson, Göran, Wilson, Thomas G., Sousa, Sérgio G., Gandolfi, Davide, Hébrard, Guillaume H., Alibert, Yann, Alonso, Roi, Anglada, Guillem, Bárczy, Tamás, Barrado, David, Barros, Susana C.C., Baumjohann, Wolfgang, and Queloz, Didier
Subjects: stars: variables: δ Scuti, variables: δ Scuti, techniques: photometric, comets: general, circumstellar matter, stars: individual: HD 172555 [stars], stars: individual: HD 172555
Abstract: HD 172555 is a young (∼20 Myr) A7V star surrounded by a 10 au wide debris disk suspected to be replenished partly by collisions between large planetesimals. Small evaporating transiting bodies, that is exocomets, have also been detected in this system by spectroscopy. After β Pictoris, this is another example of a system possibly witnessing a phase of the heavy bombardment of planetesimals. In such a system, small bodies trace dynamical evolution processes. We aim to constrain their dust content by using transit photometry. We performed a 2-day-long photometric monitoring of HD 172555 with the CHEOPS space telescope in order to detect shallow transits of exocomets with a typical expected duration of a few hours. The large oscillations in the light curve indicate that HD 172555 is a δ Scuti pulsating star. After removing those dominating oscillations, we found a hint of a transient absorption. If fitted with an exocomet transit model, it would correspond to an evaporating body passing near the star at a distance of 6.8±1.4R∗ (or 0.05±0.01 au) with a radius of 2.5 km. These properties are comparable to those of the exocomets already found in this system using spectroscopy, as well as those found in the β Pic system. The nuclei of the Solar System's Jupiter family comets, with radii of 2-6 km, are also comparable in size. This is the first piece of evidence of an exocomet photometric transit detection in the young system of HD 172555., Astronomy & Astrophysics, 671, ISSN:0004-6361, ISSN:1432-0746
Published: 2023

41. Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO

Author: Sulis, S., Lendl, M., Cegla, H. M., Rodriguez Diaz, L. F., Bigot, L., Van Grootel, V., Bekkelien, A., Collier Cameron, A., Maxted, P. F. L., Simon, A. E., Lovis, C., Scandariato, G., Bruno, G., Nardiello, D., Bonfanti, A., Fridlund, M., Persson, C. M., Salmon, S., Sousa, S. G., Wilson, T. G., Krenn, A., Hoyer, S., Santerne, A., Ehrenreich, D., Alibert, Y., Alonso, R., Anglada Escudé, G., Bàrczy, T., Barrado y Navascués, D., Barros, S. C. C., Baumjohann, W., Beck, M., Beck, T., Benz, W., Billot, N., Bonfils, X., Borsato, L., Brandeker, A., Broeg, C., Cabrera, J., Charnoz, S., Corral Van Damme, C., Csizmadia, Sz., Davies, M. B., Deleuil, M., Deline, A., Delrez, L., Demangeon, O. D. S., Demory, B. -O., Erikson, A., Fortier, A., Fossati, L., Gandolfi, D., Gillon, M., Güdel, M., Heng, K., Isaak, K. G., Kiss, L. L., Laskar, J., Lecavelier des Etangs, A., Magrin, D., Munari, M., Nascimbeni, V., Olofsson, G., Ottensamer, R., Pagano, I., Palle, E., Peter, G., Piotto, G., Pollacco, D., Queloz, D., Ragazzoni, R., Rando, N., Rauer, H., Ribas, I., Rieder, M., Santos, N. C., Segransan, D., Smith, A. M. S., Steinberger, M., Steller, M., Szabó, Gy. M., Thomas, N., Udry, S., Walton, N. A., Wolter, D., 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), 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, Institut de Physique du Globe de Paris (IPGP (UMR_7154)), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), 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 Lille-Sorbonne Université (SU)-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), Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, University of St Andrews. School of Economics and Finance, and University of St Andrews. University of St Andrews
Subjects: radial velocities and photometric [Techniques], FOS: Physical sciences, Sun: granulation, techniques: photometric, stars: atmospheres, techniques: radial velocities, QB Astronomy, atmospheres [Stars], data analysis [Methods], QC, Solar and Stellar Astrophysics (astro-ph.SR), QB, MCC, Earth and Planetary Astrophysics (astro-ph.EP), radial velocities [Techniques], photometric [Techniques], 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften, DAS, Astronomy and Astrophysics, methods: data analysis, QC Physics, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, [SDU]Sciences of the Universe [physics], granulation [Sun], Astrophysics - Earth and Planetary Astrophysics
Abstract: Context. Stellar granulation generates fluctuations in photometric and spectroscopic data whose properties depend on the stellar type, composition, and evolutionary state. Characterizing granulation is key for understanding stellar atmospheres and detecting planets. Aims. We aim to detect the signatures of stellar granulation, link spectroscopic and photometric signatures of convection for mainsequence stars, and test predictions from 3D hydrodynamic models. Methods. For the first time, we observed two bright stars (Teff = 5833 and 6205 K) with high-precision observations taken simultaneously with CHEOPS and ESPRESSO. We analyzed the properties of the stellar granulation signal in each individual dataset. We compared them to Kepler observations and 3D hydrodynamic models. While isolating the granulation-induced changes by attenuating and filtering the p-mode oscillation signals, we studied the relationship between photometric and spectroscopic observables. Results. The signature of stellar granulation is detected and precisely characterized for the hotter F star in the CHEOPS and ESPRESSO observations. For the cooler G star, we obtain a clear detection in the CHEOPS dataset only. The TESS observations are blind to this stellar signal. Based on CHEOPS observations, we show that the inferred properties of stellar granulation are in agreement with both Kepler observations and hydrodynamic models. Comparing their periodograms, we observe a strong link between spectroscopic and photometric observables. Correlations of this stellar signal in the time domain (flux versus radial velocities, RV) and with specific spectroscopic observables (shape of the cross-correlation functions) are however difficult to isolate due to S/N dependent variations. Conclusions. In the context of the upcoming PLATO mission and the extreme precision RV surveys, a thorough understanding of the properties of the stellar granulation signal is needed. The CHEOPS and ESPRESSO observations pave the way for detailed analyses of this stellar process., Astronomy & Astrophysics, 670, ISSN:0004-6361, ISSN:1432-0746
Published: 2023
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42. The geometric albedo of the hot Jupiter HD 189733b measured with CHEOPS

Author: Krenn, A. F., primary, Lendl, M., additional, Patel, J. A., additional, Carone, L., additional, Deleuil, M., additional, Sulis, S., additional, Collier Cameron, A., additional, Deline, A., additional, Guterman, P., additional, Queloz, D., additional, Fossati, L., additional, Brandeker, A., additional, Heng, K., additional, Akinsanmi, B., additional, Adibekyan, V., additional, Bonfanti, A., additional, Demangeon, O. D. S., additional, Kitzmann, D., additional, Salmon, S., additional, Sousa, S. G., additional, Wilson, T. G., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Blecha, L., additional, Bonfils, X., additional, Borsato, L., additional, Broeg, C., additional, Cabrera, J., additional, Charnoz, S., additional, Corral van Damme, C., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Delrez, L., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Farinato, J., additional, Fortier, A., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Kopp, E., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Venturini, J., additional, and Walton, N. A., additional
Published: 2023
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43. The high-albedo, low polarization disk around HD 114082 that harbors a Jupiter-sized transiting planet

Author: Engler, N., primary, Milli, J., additional, Gratton, R., additional, Ulmer-Moll, S., additional, Vigan, A., additional, Lagrange, A.-M., additional, Kiefer, F., additional, Rubini, P., additional, Grandjean, A., additional, Schmid, H. M., additional, Messina, S., additional, Squicciarini, V., additional, Olofsson, J., additional, Thébault, P., additional, van Holstein, R. G., additional, Janson, M., additional, Ménard, F., additional, Marshall, J. P., additional, Chauvin, G., additional, Lendl, M., additional, Bhowmik, T., additional, Boccaletti, A., additional, Bonnefoy, M., additional, del Burgo, C., additional, Choquet, E., additional, Desidera, S., additional, Feldt, M., additional, Fusco, T., additional, Girard, J., additional, Gisler, D., additional, Hagelberg, J., additional, Langlois, M., additional, Maire, A.-L., additional, Mesa, D., additional, Meyer, M. R., additional, Rabou, P., additional, Rodet, L., additional, Schmidt, T., additional, and Zurlo, A., additional
Published: 2023
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44. Glancing through the debris disk: Photometric analysis of DE Boo with CHEOPS

Author: Boldog, Á., primary, Szabó, Gy. M., additional, Kriskovics, L., additional, Brandeker, A., additional, Kiefer, F., additional, Bekkelien, A., additional, Guterman, P., additional, Olofsson, G., additional, Simon, A. E., additional, Gandolfi, D., additional, Serrano, L. M., additional, Wilson, T. G., additional, Sousa, S. G., additional, Lecavelier des Etangs, A., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Bandy, T., additional, Bárczy, T., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Bonfils, X., additional, Broeg, C., additional, Buder, M., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Corral van Damme, C., additional, Csizmadia, Sz., additional, Davies, M. B., additional, Deline, A., additional, Deleuil, M., additional, Delrez, L., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Farinato, J., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Gillon, M., additional, Güdel, M., additional, Heng, K., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Laskar, J., additional, Lendl, M., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Mecina, M., additional, Nascimbeni, V., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Smith, A. M. S., additional, Steller, M., additional, Thomas, N., additional, Udry, S., additional, Van Grootel, V., additional, and Walton, N. A., additional
Published: 2023
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45. TOI-1055 b: Neptunian planet characterised with HARPS, TESS, and CHEOPS

Author: Bonfanti, A., primary, Gandolfi, D., additional, Egger, J. A., additional, Fossati, L., additional, Cabrera, J., additional, Krenn, A., additional, Alibert, Y., additional, Benz, W., additional, Billot, N., additional, Florén, H.-G., additional, Lendl, M., additional, Adibekyan, V., additional, Salmon, S., additional, Santos, N. C., additional, Sousa, S. G., additional, Wilson, T. G., additional, Barragán, O., additional, Collier Cameron, A., additional, Delrez, L., additional, Esposito, M., additional, Goffo, E., additional, Osborne, H., additional, Osborn, H. P., additional, Serrano, L. M., additional, Van Eylen, V., additional, Alarcon, J., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado Navascues, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Bedell, M., additional, Bonfils, X., additional, Borsato, L., additional, Brandeker, A., additional, Broeg, C., additional, Charnoz, S., additional, Corral Van Damme, C., additional, Csizmadia, Sz., additional, Cubillos, P. E., additional, Davies, M. B., additional, Deleuil, M., additional, Demangeon, O. D. S., additional, Demory, B.-O., additional, Ehrenreich, D., additional, Erikson, A., additional, Fortier, A., additional, Fridlund, M., additional, Gillon, M., additional, Güdel, M., additional, Hoyer, S., additional, Isaak, K. G., additional, Kerschbaum, F., additional, Kiss, L. L., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lorenzo-Oliveira, D., additional, Lovis, C., additional, Magrin, D., additional, Marafatto, L., additional, Maxted, P. F. L., additional, Meléndez, J., additional, Mordasini, C., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piazza, D., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Venturini, J., additional, and Walton, N. A., additional
Published: 2023
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46. A full transit of v2 Lupi d and the search for an exomoon in its Hill sphere with CHEOPS,

Author: Ehrenreich, D., primary, Delrez, L., additional, Akinsanmi, B., additional, Wilson, T. G., additional, Bonfanti, A., additional, Beck, M., additional, Benz, W., additional, Hoyer, S., additional, Queloz, D., additional, Alibert, Y., additional, Charnoz, S., additional, Collier Cameron, A., additional, Deline, A., additional, Hooton, M., additional, Lendl, M., additional, Olofsson, G., additional, Sousa, S. G., additional, Adibekyan, V., additional, Alonso, R., additional, Anglada, G., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, T., additional, Bekkelien, A., additional, Bergomi, M., additional, Billot, N., additional, Bonfils, X., additional, Brandeker, A., additional, Broeg, C., additional, Bárczy, T., additional, Berta-Thompson, Z. K., additional, Cabrera, J., additional, Corral Van Damme, C., additional, Csizmadia, S., additional, Davies, M. B., additional, Deleuil, M., additional, Demangeon, O., additional, Demory, B.-O., additional, Doty, J. P., additional, Erikson, A., additional, Fausnaugh, M. M., additional, Florén, H.-G., additional, Fortier, A., additional, Fossati, L., additional, Fridlund, M., additional, Futyan, D., additional, Gandolfi, D., additional, Gillon, M., additional, Guterman, P., additional, Güdel, M., additional, Heng, K., additional, Isaak, K. G., additional, Jäckel, A., additional, Jenkins, J. M., additional, Kiss, L. L., additional, Laskar, J., additional, Latham, D. W., additional, Lecavelier des Etangs, A., additional, Levine, A. M., additional, Lovis, C., additional, Magrin, D., additional, Maxted, P. F. L., additional, Morgan, E. H., additional, Nascimbeni, V., additional, Osborn, H. P., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Ricker, G. R., additional, Salmon, S., additional, Santos, N. C., additional, Scandariato, G., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steinberger, M., additional, Steller, M., additional, Szabó, G. M., additional, Ségransan, D., additional, Shporer, A., additional, Thomas, N., additional, Tschentscher, M., additional, Udry, S., additional, Vanderspek, R., additional, Van Grootel, V., additional, and Walton, N. A., additional
Published: 2023
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47. Examining the orbital decay targets KELT-9 b, KELT-16 b, and WASP-4b, and the transit-timing variations of HD 97658 b

Author: Harre, J.-V., primary, Smith, A. M. S., additional, Barros, S. C. C., additional, Boué, G., additional, Csizmadia, Sz., additional, Ehrenreich, D., additional, Florén, H.-G., additional, Fortier, A., additional, Maxted, P. F. L., additional, Hooton, M. J., additional, Akinsanmi, B., additional, Serrano, L. M., additional, Rosário, N. M., additional, Demory, B.-O., additional, Jones, K., additional, Laskar, J., additional, Adibekyan, V., additional, Alibert, Y., additional, Alonso, R., additional, Anderson, D. R., additional, Anglada, G., additional, Asquier, J., additional, Bárczy, T., additional, Barrado y Navascues, D., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Billot, N., additional, Biondi, F., additional, Bonfanti, A., additional, Bonfils, X., additional, Brandeker, A., additional, Broeg, C., additional, Cabrera, J., additional, Cessa, V., additional, Charnoz, S., additional, Collier Cameron, A., additional, Davies, M. B., additional, Deleuil, M., additional, Delrez, L., additional, Demangeon, O. D. S., additional, Erikson, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Hellier, C., additional, Heng, K., additional, Hoyer, S., additional, Isaak, K. G., additional, Kiss, L. L., additional, Lecavelier des Etangs, A., additional, Lendl, M., additional, Lovis, C., additional, Luntzer, A., additional, Magrin, D., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Persson, C. M., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Rauer, H., additional, Ribas, I., additional, Ricker, G. R., additional, Salmon, S., additional, Santos, N. C., additional, Scandariato, G., additional, Seager, S., additional, Ségransan, D., additional, Simon, A. E., additional, Sousa, S. G., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Ulmer, B., additional, Van Grootel, V., additional, Walton, N. A., additional, Wilson, T. G., additional, Winn, J. N., additional, and Wohler, B., additional
Published: 2023
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48. 55 Cancri e’s occultation captured with CHEOPS,

Author: Demory, B.-O., primary, Sulis, S., additional, Meier Valdés, E., additional, Delrez, L., additional, Brandeker, A., additional, Billot, N., additional, Fortier, A., additional, Hoyer, S., additional, Sousa, S. G., additional, Heng, K., additional, Lendl, M., additional, Krenn, A., additional, Morris, B. M., additional, Patel, J. A., additional, Alibert, Y., additional, Alonso, R., additional, Anglada, G., additional, Bárczy, T., additional, Barrado, D., additional, Barros, S. C. C., additional, Baumjohann, W., additional, Beck, M., additional, Beck, T., additional, Benz, W., additional, Bonfils, X., additional, Broeg, C., additional, Buder, M., additional, Cabrera, J., additional, Charnoz, S., additional, Collier Cameron, A., additional, Cottard, H., additional, Csizmadia, Sz., additional, Davies, M. B., additional, Deleuil, M., additional, Demangeon, O. D. S., additional, Ehrenreich, D., additional, Erikson, A., additional, Fossati, L., additional, Fridlund, M., additional, Gandolfi, D., additional, Gillon, M., additional, Güdel, M., additional, Isaak, K. G., additional, Kiss, L. L., additional, Laskar, J., additional, Lecavelier des Etangs, A., additional, Lovis, C., additional, Luntzer, A., additional, Magrin, D., additional, Marafatto, L., additional, Maxted, P. F. L., additional, Nascimbeni, V., additional, Olofsson, G., additional, Ottensamer, R., additional, Pagano, I., additional, Pallé, E., additional, Peter, G., additional, Piotto, G., additional, Pollacco, D., additional, Queloz, D., additional, Ragazzoni, R., additional, Rando, N., additional, Ratti, F., additional, Rauer, H., additional, Ribas, I., additional, Santos, N. C., additional, Scandariato, G., additional, Ségransan, D., additional, Simon, A. E., additional, Smith, A. M. S., additional, Steller, M., additional, Szabó, Gy. M., additional, Thomas, N., additional, Udry, S., additional, Van Grootel, V., additional, and Walton, N. A., additional
Published: 2023
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49. ISPY – NaCo imaging survey for planets around young stars

Author: Godoy, N., Olofsson, J., Bayo, A., Cheetham, A. C., Launhardt, R., Chauvin, G., Kennedy, Grant M., Brems, S. S., Cugno, G., Girard, J. H., Henning, Th., Müller, A., Barcucci, A. Musso, Pepe, F., Quanz, S. P., Quirrenbach, A., Reffert, S., Rickman, E. L., Samland, M., Ségransan, D., and Stolker, T.
Subjects: TA, QB
Abstract: Context. Direct imaging has made significant progress over the past decade, in part thanks to a new generation of instruments and excellent adaptive optic systems, but also thanks to advanced post-processing techniques. The combination of these two factors allowed the detection of several giant planets with separations as close as 0.2 arcsec with contrasts typically reaching 9–10 magnitudes at nearinfrared wavelengths. Observing strategies and data rates vary depending on the instrument and the wavelength, with L- and M-band observations yielding tens of thousands of images to be combined.\ud \ud Aims. We present a new approach, tailored for VLT/NaCo observations performed with the Annular Groove Phase Mask (AGPM) coronagraph, but that can be applied to other instruments using similar coronagraphs. Our pipeline aims to improve the post-processing of the observations on two fronts: identifying the location of the star behind the AGPM to better align the science frames and performing frame selection.\ud \ud Methods. Our method relies on finding the position of the AGPM in the sky frame observations, and correlating it with the circular aperture of the coronagraphic mask. This relationship allows us to retrieve the location of the AGPM in the science frames. We are then able to model the torus shape visible in the sky-subtracted science frames, as a combination of negative and positive 2D Gaussian functions. The model provides additional information that is useful to design our frame selection criteria.\ud \ud Results. We tested our pipeline on three targets (β Pictoris, R CrA, and HD 34282), two of which have companions at intermediate and close separations, and the third hosts a bright circumstellar disk. We find that the centering of the science frames has a significant impact on the signal-to-noise ratio (S/N) of the companions. Our results suggest that the best reduction is achieved when performing the principal component analysis centered on the location of the AGPM and derotating the frames centered at the location of the star before collapsing the final datacube. We improved the S/N of companions around β Pictoris and R CrA by 24 ± 3% and 117 ± 11% respectively, compared to other state-of-the-art reductions. We find that the companion position for all the centering strategies are consistent within 3σ. Finally, we find that even for NaCo observations with tens of thousands of frames, frame selection yields just marginal improvement for point sources, but may improve the final images for objects with extended emission such as disks.\ud \ud Conclusions. We propose a novel approach to identify the location of the star behind a coronagraph even when it cannot easily be determined by other methods. We led a thorough study on the importance of frame selection, concluding that the improvements are marginal in most cases, but may yield better contrast in some specific cases. Our approach can be applied to the wealth of archival NaCo data and, assuming that the field of view includes the edges of the coronagraphic mask, its implementation can be adapted to other instruments with coronagraphs similar to the AGPM used on NaCo (e.g., Keck/NIRC2, LBT/LMIRCam).
Published: 2022

50. Influence of Phase Change Materials (PCMs) on the thermal performance of building envelopes

Author: Zhou Hongxia, Fransson Åke, and Olofsson Thomas
Subjects: Environmental sciences, GE1-350
Abstract: To understand the influence of PCM wall configurations on the thermal performance of building envelopes, an explicit finite element model of heat transfer from indoor to outdoor (or vice versa) is developed. The accuracy of this model is first validated against the electrical circuit analogy model, and then compared with the experimental data measured in a Hot-Box device. A good agreement between the simulation results and experimental results is obtained. The results of this study show that the PCM configuration layer sequence significantly will affect the thermal performance of building envelopes and that the FEM model developed is a promising tool, which after some more development may be used for optimising PCM wall configurations.
Published: 2020
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