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15 results on '"Brandeker A"'

1. Two warm Neptunes transiting HIP 9618 revealed by TESS and Cheops

Author

Osborn, H P, primary, Nowak, G, additional, Hébrard, G, additional, Masseron, T, additional, Lillo-Box, J, additional, Pallé, E, additional, Bekkelien, A, additional, Florén, H-G, additional, Guterman, P, additional, Simon, A E, additional, Adibekyan, V, additional, Bieryla, A, additional, Borsato, L, additional, Brandeker, A, additional, Ciardi, D R, additional, Collier Cameron, A, additional, Collins, K A, additional, Egger, J A, additional, Gandolfi, D, additional, Hooton, M J, additional, Latham, D W, additional, Lendl, M, additional, Matthews, E C, additional, Tuson, A, additional, Ulmer-Moll, S, additional, Vanderburg, A, additional, Wilson, T G, additional, Ziegler, C, additional, Alibert, Y, additional, Alonso, R, additional, Anglada, G, additional, Arnold, L, additional, Asquier, J, additional, Barrado y Navascues, D, additional, Baumjohann, W, additional, Beck, T, additional, Belinski, A A, additional, Benz, W, additional, Biondi, F, additional, Boisse, I, additional, Bonfils, X, additional, Broeg, C, additional, Buchhave, L A, additional, Bárczy, T, additional, Barros, S C C, additional, Cabrera, J, additional, Cardona Guillen, C, additional, Carleo, I, additional, Castro-González, A, additional, Charnoz, S, additional, Christiansen, J, additional, Cortes-Zuleta, P, additional, Csizmadia, S, additional, Dalal, S, additional, Davies, M B, additional, Deleuil, M, additional, Delfosse, X, additional, Delrez, L, additional, Demory, B-O, additional, Dunlavey, A B, additional, Ehrenreich, D, additional, Erikson, A, additional, Fernandes, R B, additional, Fortier, A, additional, Forveille, T, additional, Fossati, L, additional, Fridlund, M, additional, Gillon, M, additional, Goeke, R F, additional, Goliguzova, M V, additional, Gonzales, E J, additional, Günther, M N, additional, Güdel, M, additional, Heidari, N, additional, Henze, C E, additional, Howell, S, additional, Hoyer, S, additional, Frey, J I, additional, Isaak, K G, additional, Jenkins, J M, additional, Kiefer, F, additional, Kiss, L, additional, Korth, J, additional, Maxted, P F L, additional, Laskar, J, additional, Lecavelier des Etangs, A, additional, Lovis, C, additional, Lund, M B, additional, Luque, R, additional, Magrin, D, additional, Almenara, J M, additional, Martioli, E, additional, Mecina, M, additional, Medina, J V, additional, Moldovan, D, additional, Morales-Calderón, M, additional, Morello, G, additional, Moutou, C, additional, Murgas, F, additional, Jensen, E L N, additional, Nascimbeni, V, additional, Olofsson, G, additional, Ottensamer, R, additional, Pagano, I, 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, additional, Demangeon, O D S, additional, Smith, A M S, additional, Santos, N, additional, Scandariato, G, additional, Seager, S, additional, Sousa, S G, additional, Steller, M, additional, Szabó, G M, additional, Ségransan, D, additional, Thomas, N, additional, Udry, S, additional, Ulmer, B, additional, Van Grootel, V, additional, Vanderspek, R, additional, Walton, N, additional, and Winn, J N, additional more...

Published
2023
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2. TESS and CHEOPS discover two warm sub-Neptunes transiting the bright K-dwarf HD 15906

Author

Tuson, A, primary, Queloz, D, additional, Osborn, H P, additional, Wilson, T G, additional, Hooton, M J, additional, Beck, M, additional, Lendl, M, additional, Olofsson, G, additional, Fortier, A, additional, Bonfanti, A, additional, Brandeker, A, additional, Buchhave, L A, additional, Collier Cameron, A, additional, Ciardi, D R, additional, Collins, K A, additional, Gandolfi, D, additional, Garai, Z, additional, Giacalone, S, additional, Gomes da Silva, J, additional, Howell, S B, additional, Patel, J A, additional, Persson, C M, additional, Serrano, L M, additional, Sousa, S G, additional, Ulmer-Moll, S, additional, Vanderburg, A, additional, Ziegler, C, 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, T, additional, Benz, W, additional, Billot, N, additional, Bonfils, X, additional, Borsato, L, additional, Broeg, C, additional, Cabrera, J, additional, Charnoz, S, additional, Conti, D M, additional, Csizmadia, Sz, additional, Cubillos, P E, additional, Davies, M B, additional, Deleuil, M, additional, Delrez, L, additional, Demangeon, O D S, additional, Demory, B-O, additional, Dragomir, D, additional, Dressing, C D, additional, Ehrenreich, D, additional, Erikson, A, additional, Essack, Z, additional, Farinato, J, additional, Fossati, L, additional, Fridlund, M, additional, Furlan, E, additional, Gill, H, additional, Gillon, M, additional, Gnilka, C L, additional, Gonzales, E, additional, Güdel, M, additional, Günther, M N, additional, Hoyer, S, additional, Isaak, K G, additional, Jenkins, J M, additional, Kiss, L L, additional, Laskar, J, additional, Latham, D W, additional, Law, N, additional, Lecavelier des Etangs, A, additional, Curto, G Lo, additional, Lovis, C, additional, Luque, R, additional, Magrin, D, additional, Mann, A W, additional, Maxted, P F L, additional, Mayor, M, additional, McDermott, S, additional, Mecina, M, additional, Mordasini, C, additional, Mortier, A, additional, Nascimbeni, V, additional, Ottensamer, R, additional, Pagano, I, additional, Pallé, E, additional, Peter, G, additional, Piotto, G, additional, Pollacco, D, additional, Pritchard, T, additional, Ragazzoni, R, additional, Rando, N, additional, Ratti, F, additional, Rauer, H, additional, Ribas, I, additional, Ricker, G R, additional, Rieder, M, additional, Santos, N C, additional, Savel, A B, additional, Scandariato, G, additional, Schwarz, R P, additional, Seager, S, additional, Ségransan, D, additional, Shporer, A, additional, Simon, A E, additional, Smith, A M S, additional, Steller, M, additional, Stockdale, C, additional, Szabó, Gy M, additional, Thomas, N, additional, Torres, G, additional, Tronsgaard, R, additional, Udry, S, additional, Ulmer, B, additional, Van Grootel, V, additional, Vanderspek, R, additional, Venturini, J, additional, Walton, N A, additional, Winn, J N, additional, and Wohler, B, additional more...

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2023
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3. TOI-836: A super-Earth and mini-Neptune transiting a nearby K-dwarf

Author

Hawthorn, Faith, primary, Bayliss, Daniel, additional, Wilson, Thomas G, additional, Bonfanti, Andrea, additional, Adibekyan, Vardan, additional, Alibert, Yann, additional, Sousa, Sérgio G, additional, Collins, Karen A, additional, Bryant, Edward M, additional, Osborn, Ares, additional, Armstrong, David J, additional, Abe, Lyu, additional, Acton, Jack S, additional, Addison, Brett C, additional, Agabi, Karim, additional, Alonso, Roi, additional, Alves, Douglas R, additional, Anglada-Escudé, Guillem, additional, Bárczy, Tamas, additional, Barclay, Thomas, additional, Barrado, David, additional, Barros, Susana C C, additional, Baumjohann, Wolfgang, additional, Bendjoya, Philippe, additional, Benz, Willy, additional, Bieryla, Allyson, additional, Bonfils, Xavier, additional, Bouchy, François, additional, Brandeker, Alexis, additional, Broeg, Christopher, additional, Brown, David J A, additional, Burleigh, Matthew R, additional, Buttu, Marco, additional, Cabrera, Juan, additional, Caldwell, Douglas A, additional, Casewell, Sarah L, additional, Charbonneau, David, additional, Charnoz, Sébastian, additional, Cloutier, Ryan, additional, Cameron, Andrew Collier, additional, Collins, Kevin I, additional, Conti, Dennis M, additional, Crouzet, Nicolas, additional, Czismadia, Szilárd, additional, Davies, Melvyn B, additional, Deleuil, Magali, additional, Delgado-Mena, Elisa, additional, Delrez, Laetitia, additional, Demangeon, Olivier D S, additional, Demory, Brice-Olivier, additional, Dransfield, Georgina, additional, Dumusque, Xavier, additional, Egger, Jo Ann, additional, Ehrenreich, David, additional, Eigmüller, Philipp, additional, Erickson, Anders, additional, Essack, Zahra, additional, Fortier, Andrea, additional, Fossati, Luca, additional, Fridlund, Malcolm, additional, Günther, Maximilian N, additional, Güdel, Manuel, additional, Gandolfi, Davide, additional, Gillard, Harvey, additional, Gillon, Michaël, additional, Gnilka, Crystal, additional, Goad, Michael R, additional, Goeke, Robert F, additional, Guillot, Tristan, additional, Hadjigeorghiou, Andreas, additional, Hellier, Coel, additional, Henderson, Beth A, additional, Heng, Kevin, additional, Hooton, Matthew J, additional, Horne, Keith, additional, Howell, Steve B, additional, Hoyer, Sergio, additional, Irwin, Jonathan M, additional, Jenkins, James S, additional, Jenkins, Jon M, additional, Jensen, Eric L N, additional, Kane, Stephen R, additional, Kendall, Alicia, additional, Kielkopf, John F, additional, Kiss, Laszlo L, additional, Lacedelli, Gaia, additional, Laskar, Jacques, additional, Latham, David W, additional, Etangs, Alain Lecavalier des, additional, Leleu, Adrien, additional, Lendl, Monika, additional, Lillo-Box, Jorge, additional, Lovis, Christophe, additional, Mékarnia, Djamel, additional, Massey, Bob, additional, Masters, Tamzin, additional, Maxted, Pierre F L, additional, Nascimbeni, Valerio, additional, Nielsen, Louise D, additional, O’Brien, Sean M, additional, Olofsson, Göran, additional, Osborn, Hugh P, additional, Pagano, Isabella, additional, Pallé, Enric, additional, Persson, Carina M, additional, Piotto, Giampaolo, additional, Plavchan, Peter, additional, Pollacco, Don, additional, Queloz, Didier, additional, Ragazzoni, Roberto, additional, Rauer, Heike, additional, Ribas, Ignasi, additional, Ricker, George, additional, Ségransan, Damien, additional, Salmon, Sébastien, additional, Santerne, Alexandre, additional, Santos, Nuno C, additional, Scandariato, Gaetano, additional, Schmider, François-Xavier, additional, Schwarz, Richard P, additional, Seager, Sara, additional, Shporer, Avi, additional, Simon, Attila E, additional, Smith, Alexis M S, additional, Srdoc, Gregor, additional, Steller, Manfred, additional, Suarez, Olga, additional, Szabó, Gyula M, additional, Teske, Johanna, additional, Thomas, Nicolas, additional, Tilbrook, Rosanna H, additional, Triaud, Amaury H M J, additional, Udry, Stéphane, additional, Van Grootel, Valérie, additional, Walton, Nicholas, additional, Wang, Sharon X, additional, Wheatley, Peter J, additional, Winn, Joshua N, additional, Wittenmyer, Robert A, additional, and Zhang, Hui, additional more...

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2023
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4. Discovery of TOI-1260d and the characterization of the multiplanet system

Author

Lam, K W F, primary, Cabrera, J, additional, Hooton, M J, additional, Alibert, Y, additional, Bonfanti, A, additional, Beck, M, additional, Deline, A, additional, Florén, H-G, additional, Simon, A E, additional, Fossati, L, additional, Persson, C M, additional, Fridlund, M, additional, Salmon, S, additional, Hoyer, S, additional, Osborn, H P, additional, Wilson, T G, additional, Georgieva, I Y, additional, Nowak, Gr, additional, Luque, R, additional, Egger, J A, additional, Adibekyan, V, additional, Alonso, R, additional, Escudé, G A, additional, Bárczy, T, additional, Barrado, D, additional, Barros, S C C, additional, Baumjohann, W, additional, Beck, T, additional, Bekkelien, A, additional, Benz, W, additional, Billot, N, additional, Bonfils, X, additional, Brandeker, A, additional, Broeg, C, additional, Charnoz, S, additional, Cameron, A C, additional, Csizmadia, Sz, additional, Davies, M B, additional, Deleuil, M, additional, Delrez, L, additional, Demangeon, O D S, additional, Demory, B-O, additional, Ehrenreich, D, additional, Erikson, A, additional, Fortier, A, additional, Futyan, D, additional, Gandolfi, D, additional, Gillon, M, additional, Guedel, M, additional, Guterman, P, additional, Laskar, J, additional, Latham, D W, additional, Lecavelier des Etangs, A, additional, Lendl, M, additional, Lovis, C, additional, Heng, K, additional, Isaak, K G, additional, Kiss, L, 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, Ribas, I, additional, Ragazzoni, R, additional, Rando, N, additional, Rauer, H, additional, Santos, N C, additional, Scandariato, G, additional, Seager, S, additional, Ségransan, D, additional, Serrano, L M, additional, Smith, A M S, additional, Sousa, S G, additional, Steller, M, additional, Szabó, Gy M, additional, Thomas, N, additional, Udry, S, additional, Van Grootel, V, additional, Walton, N A, additional, and Winn., J N, additional more...

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2022
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5. The EBLM project – IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves

Author

D Sebastian, M I Swayne, P F L Maxted, A H M J Triaud, S G Sousa, G Olofsson, M Beck, N Billot, S Hoyer, S Gill, N Heidari, D V Martin, C M Persson, M R Standing, Y Alibert, R Alonso, G Anglada, J Asquier, T Bárczy, D Barrado, S C C Barros, M P Battley, W Baumjohann, T Beck, W Benz, M Bergomi, I Boisse, X Bonfils, A Brandeker, C Broeg, J Cabrera, S Charnoz, A Collier Cameron, Sz Csizmadia, M B Davies, M Deleuil, L Delrez, O D S Demangeon, B-O Demory, G Dransfield, D Ehrenreich, A Erikson, A Fortier, L Fossati, M Fridlund, D Gandolfi, M Gillon, M Güdel, J Hasiba, G Hébrard, K Heng, K G Isaak, L L Kiss, E Kopp, V Kunovac, J Laskar, A Lecavelier des Etangs, M Lendl, C Lovis, D Magrin, J McCormac, N J Miller, V Nascimbeni, R Ottensamer, I Pagano, E Pallé, F A Pepe, G Peter, G Piotto, D Pollacco, D Queloz, R Ragazzoni, N Rando, H Rauer, I Ribas, S Lalitha, A Santerne, N C Santos, G Scandariato, D Ségransan, A E Simon, A M S Smith, M Steller, Gy M Szabó, N Thomas, S Udry, V Van Grootel, N A Walton, 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 d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut 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), Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, and University of St Andrews. St Andrews Centre for Exoplanet Science more...

Subjects
stars fundamental parameters, 530 Physics, FOS: Physical sciences, techniques spectroscopic, 610 Medicine & health, 000 Computer science, knowledge & systems, fundamental parameters [Stars], spectroscopic [Techniques], techniques: photometric, low-mass [Stars], stars: low-mass, QB460, QB Astronomy, binaries eclipsing, Solar and Stellar Astrophysics (astro-ph.SR), QB600, QC, QB, Earth and Planetary Astrophysics (astro-ph.EP), MCC, stars low-mass, 520 Astronomy, eclipsing [Binaries], photometric [Techniques], binaries: eclipsing, Astronomy and Astrophysics, 3rd-DAS, 620 Engineering, techniques photometric, QC Physics, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, [SDU]Sciences of the Universe [physics], 570 Life sciences, biology, stars: fundamental parameters, techniques: spectroscopic, Astrophysics - Earth and Planetary Astrophysics
Abstract

Eclipsing binaries are important benchmark objects to test and calibrate stellar structure and evolution models. This is especially true for binaries with a fully convective M-dwarf component for which direct measurements of these stars' masses and radii are difficult using other techniques. Within the potential of M-dwarfs to be exoplanet host stars, the accuracy of theoretical predictions of their radius and effective temperature as a function of their mass is an active topic of discussion. Not only the parameters of transiting exoplanets but also the success of future atmospheric characterisation rely on accurate theoretical predictions. We present the analysis of five eclipsing binaries with low-mass stellar companions out of a sub-sample of 23, for which we obtained ultra high-precision light curves using the CHEOPS satellite. The observation of their primary and secondary eclipses are combined with spectroscopic measurements to precisely model the primary parameters and derive the M-dwarfs mass, radius, surface gravity, and effective temperature estimates using the PYCHEOPS data analysis software. Combining these results to the same set of parameters derived from TESS light curves, we find very good agreement (better than 1\% for radius and better than 0.2% for surface gravity). We also analyse the importance of precise orbits from radial velocity measurements and find them to be crucial to derive M-dwarf radii in a regime below 5% accuracy. These results add five valuable data points to the mass-radius diagram of fully-convective M-dwarfs., 19 pages, 12 figures, accepted for publication in MNRAS more...

Published
2022
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6. The EBLM project – IX. Five fully convective M-dwarfs, precisely measured with CHEOPS and TESS light curves

Author

Sebastian, D, primary, Swayne, M I, additional, Maxted, P F L, additional, Triaud, A H M J, additional, Sousa, S G, additional, Olofsson, G, additional, Beck, M, additional, Billot, N, additional, Hoyer, S, additional, Gill, S, additional, Heidari, N, additional, Martin, D V, additional, Persson, C M, additional, Standing, M R, additional, Alibert, Y, additional, Alonso, R, additional, Anglada, G, additional, Asquier, J, additional, Bárczy, T, additional, Barrado, D, additional, Barros, S C C, additional, Battley, M P, additional, Baumjohann, W, additional, Beck, T, additional, Benz, W, additional, Bergomi, M, additional, Boisse, I, additional, Bonfils, X, additional, Brandeker, A, additional, Broeg, C, 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, Dransfield, G, 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, Hasiba, J, additional, Hébrard, G, additional, Heng, K, additional, Isaak, K G, additional, Kiss, L L, additional, Kopp, E, additional, Kunovac, V, additional, Laskar, J, additional, Lecavelier des Etangs, A, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, McCormac, J, additional, Miller, N J, additional, Nascimbeni, V, additional, Ottensamer, R, additional, Pagano, I, additional, Pallé, E, additional, Pepe, F A, 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, Lalitha, S, additional, Santerne, A, 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 more...

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2022
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7. Fundamental effective temperature measurements for eclipsing binary stars – III. SPIRou near-infrared spectroscopy and CHEOPS photometry of the benchmark G0V star EBLM J0113+31

Author

Maxted, P F L, primary, Miller, N J, additional, Hoyer, S, additional, Adibekyan, V, additional, Sousa, S G, additional, Billot, N, additional, Fortier, A, additional, Simon, A E, additional, Cameron, A Collier, additional, Swayne, M I, additional, Gutermann, P, additional, Triaud, A H M J, additional, Southworth, J, additional, Alibert, Y, additional, Alonso, R, additional, Anglada, G, additional, Bárczy, T, additional, Navascues, D Barrado y, additional, Barros, S C C, additional, Baumjohann, W, additional, Beck, M, additional, Beck, T, additional, Benz, W, additional, Bonfils, X, additional, Brandeker, A, additional, Broeg, C, additional, Buder, M, additional, Cabrera, J, additional, Charnoz, S, additional, van Damme, C Corral, additional, Csizmadia, Sz, additional, Davies, M B, additional, Deleuil, M, additional, Delrez, L, additional, Demangeon, O, 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, Heng, K, additional, Leon, J E Hernández, additional, Isaak, K G, additional, Kiss, L L, additional, Laskar, J, additional, Etangs, A Lecavelier des, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, Munari, M, 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, Smith, A M S, additional, Steinberger, M, additional, Steller, M, additional, Szabó, Gy M, additional, Thomas, N, additional, Udry, S, additional, Van Grootel, V, additional, and Walton, N, additional more...

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2022
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8. Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS

Author

Lacedelli, G, Wilson, TG, Malavolta, L, Hooton, MJ, Collier Cameron, A, Alibert, Y, Mortier, A, Bonfanti, A, Haywood, RD, Hoyer, S, Piotto, G, Bekkelien, A, Vanderburg, AM, Benz, W, Dumusque, X, Deline, A, Lopez-Morales, M, Borsato, L, Rice, K, Fossati, L, Latham, DW, Brandeker, A, Poretti, E, Sousa, SG, Sozzetti, A, Salmon, S, Burke, CJ, Van Grootel, V, Fausnaugh, MM, Adibekyan, V, Huang, CX, Osborn, HP, Mustill, AJ, Palle, E, Bourrier, V, Nascimbeni, V, Alonso, R, Anglada, G, Barczy, T, Barrado Y Navascues, D, Barros, SCC, Baumjohann, W, Beck, M, Beck, T, Billot, N, Bonfils, X, Broeg, C, Buchhave, LA, Cabrera, J, Charnoz, S, Cosentino, R, Csizmadia, S, Davies, MB, Deleuil, M, Delrez, L, Demangeon, O, Demory, BO, Ehrenreich, D, Erikson, A, Esparza-Borges, E, Floren, HG, Fortier, A, Fridlund, M, Futyan, D, Gandolfi, D, Ghedina, A, Gillon, M, Güdel, M, Guterman, P, Harutyunyan, A, Heng, K, Isaak, KG, Jenkins, JM, Kiss, L, Laskar, J, Lecavelier Des Etangs, A, Lendl, M, Lovis, C, Magrin, D, Marafatto, L, Martinez Fiorenzano, AF, Maxted, PFL, Mayor, M, Micela, G, Molinari, E, Murgas, F, Narita, N, Olofsson, G, Ottensamer, R, Pagano, I, Pasetti, A, Pedani, M, Pepe, FA, Peter, G, Phillips, DF, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Ratti, F, Lacedelli, G [0000-0002-4197-7374], Wilson, TG [0000-0001-8749-1962], Malavolta, L [0000-0002-6492-2085], Hooton, MJ [0000-0003-0030-332X], Collier Cameron, A [0000-0002-8863-7828], Mortier, A [0000-0001-7254-4363], Borsato, L [0000-0003-0066-9268], Rice, K [0000-0002-6379-9185], Sousa, SG [0000-0001-9047-2965], Sozzetti, A [0000-0002-7504-365X], Osborn, HP [0000-0002-4047-4724], Mustill, AJ [0000-0002-2086-3642], Nascimbeni, V [0000-0001-9770-1214], Buchhave, LA [0000-0003-1605-5666], Csizmadia, S [0000-0001-6803-9698], Delrez, L [0000-0001-6108-4808], Gandolfi, D [0000-0001-8627-9628], Lendl, M [0000-0001-9699-1459], Maxted, PFL [0000-0003-3794-1317], and Apollo - University of Cambridge Repository more...

Subjects
techniques: photometric, stars: individual: TOI-561 (TIC 377064495, Gaia EDR3 3850421005290172416), techniques: radial velocities, planets and satellites: fundamental parameters, planets and satellites: interiors
Abstract

We present a precise characterization of the TOI-561 planetary system obtained by combining previously published data with TESS and CHEOPS photometry, and a new set of $62$ HARPS-N radial velocities (RVs). Our joint analysis confirms the presence of four transiting planets, namely TOI-561 b ($P = 0.45$ d, $R = 1.42$ R$_\oplus$, $M = 2.0$ M$_\oplus$), c ($P = 10.78$ d, $R = 2.91$ R$_\oplus$, $M = 5.4$ M$_\oplus$), d ($P = 25.7$ d, $R = 2.82$ R$_\oplus$, $M = 13.2$ M$_\oplus$) and e ($P = 77$ d, $R = 2.55$ R$_\oplus$, $M = 12.6$ M$_\oplus$). Moreover, we identify an additional, long-period signal ($>450$ d) in the RVs, which could be due to either an external planetary companion or to stellar magnetic activity. The precise masses and radii obtained for the four planets allowed us to conduct interior structure and atmospheric escape modelling. TOI-561 b is confirmed to be the lowest density ($\rho_{\rm b} = 3.8 \pm 0.5$ g cm$^{-3}$) ultra-short period (USP) planet known to date, and the low metallicity of the host star makes it consistent with the general bulk density-stellar metallicity trend. According to our interior structure modelling, planet b has basically no gas envelope, and it could host a certain amount of water. In contrast, TOI-561 c, d, and e likely retained an H/He envelope, in addition to a possibly large water layer. The inferred planetary compositions suggest different atmospheric evolutionary paths, with planets b and c having experienced significant gas loss, and planets d and e showing an atmospheric content consistent with the original one. The uniqueness of the USP planet, the presence of the long-period planet TOI-561 e, and the complex architecture make this system an appealing target for follow-up studies. more...

Published
2022

9. Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS

Author

Lacedelli, G, primary, Wilson, T G, additional, Malavolta, L, additional, Hooton, M J, additional, Collier Cameron, A, additional, Alibert, Y, additional, Mortier, A, additional, Bonfanti, A, additional, Haywood, R D, additional, Hoyer, S, additional, Piotto, G, additional, Bekkelien, A, additional, Vanderburg, A M, additional, Benz, W, additional, Dumusque, X, additional, Deline, A, additional, López-Morales, M, additional, Borsato, L, additional, Rice, K, additional, Fossati, L, additional, Latham, D W, additional, Brandeker, A, additional, Poretti, E, additional, Sousa, S G, additional, Sozzetti, A, additional, Salmon, S, additional, Burke, C J, additional, Van Grootel, V, additional, Fausnaugh, M M, additional, Adibekyan, V, additional, Huang, C X, additional, Osborn, H P, additional, Mustill, A J, additional, Pallé, E, additional, Bourrier, V, additional, Nascimbeni, V, additional, Alonso, R, additional, Anglada, G, additional, Bárczy, T, additional, Barrado y Navascues, D, additional, Barros, S C C, additional, Baumjohann, W, additional, Beck, M, additional, Beck, T, additional, Billot, N, additional, Bonfils, X, additional, Broeg, C, additional, Buchhave, L A, additional, Cabrera, J, additional, Charnoz, S, additional, Cosentino, R, additional, Csizmadia, Sz, additional, Davies, M B, additional, Deleuil, M, additional, Delrez, L, additional, Demangeon, O, additional, Demory, B -O, additional, Ehrenreich, D, additional, Erikson, A, additional, Esparza-Borges, E, additional, Florén, H G, additional, Fortier, A, additional, Fridlund, M, additional, Futyan, D, additional, Gandolfi, D, additional, Ghedina, A, additional, Gillon, M, additional, Güdel, M, additional, Guterman, P, additional, Harutyunyan, A, additional, Heng, K, additional, Isaak, K G, additional, Jenkins, J M, additional, Kiss, L, additional, Laskar, J, additional, Lecavelier des Etangs, A, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, Marafatto, L, additional, Martinez Fiorenzano, A F, additional, Maxted, P F L, additional, Mayor, M, additional, Micela, G, additional, Molinari, E, additional, Murgas, F, additional, Narita, N, additional, Olofsson, G, additional, Ottensamer, R, additional, Pagano, I, additional, Pasetti, A, additional, Pedani, M, additional, Pepe, F A, additional, Peter, G, additional, Phillips, D F, 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, Sasselov, D, additional, Scandariato, G, additional, Seager, S, additional, Ségransan, D, additional, Serrano, L M, additional, Simon, A E, additional, Smith, A M S, additional, Steinberger, M, additional, Steller, M, additional, Szabó, Gy, additional, Thomas, N, additional, Twicken, J D, additional, Udry, S, additional, Walton, N, additional, and Winn, J N, additional more...

Published
2022
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10. A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS

Author

Wilson, Thomas G, primary, Goffo, Elisa, additional, Alibert, Yann, additional, Gandolfi, Davide, additional, Bonfanti, Andrea, additional, Persson, Carina M, additional, Collier Cameron, Andrew, additional, Fridlund, Malcolm, additional, Fossati, Luca, additional, Korth, Judith, additional, Benz, Willy, additional, Deline, Adrien, additional, Florén, Hans-Gustav, additional, Guterman, Pascal, additional, Adibekyan, Vardan, additional, Hooton, Matthew J, additional, Hoyer, Sergio, additional, Leleu, Adrien, additional, Mustill, Alexander James, additional, Salmon, Sébastien, additional, Sousa, Sérgio G, additional, Suarez, Olga, additional, Abe, Lyu, additional, Agabi, Abdelkrim, additional, Alonso, Roi, additional, Anglada, Guillem, additional, Asquier, Joel, additional, Bárczy, Tamas, additional, Barrado Navascues, David, additional, Barros, Susana C C, additional, Baumjohann, Wolfgang, additional, Beck, Mathias, additional, Beck, Thomas, additional, Billot, Nicolas, additional, Bonfils, Xavier, additional, Brandeker, Alexis, additional, Broeg, Christopher, additional, Bryant, Edward M, additional, Burleigh, Matthew R, additional, Buttu, Marco, additional, Cabrera, Juan, additional, Charnoz, Sébastien, additional, Ciardi, David R, additional, Cloutier, Ryan, additional, Cochran, William D, additional, Collins, Karen A, additional, Colón, Knicole D, additional, Crouzet, Nicolas, additional, Csizmadia, Szilard, additional, Davies, Melvyn B, additional, Deleuil, Magali, additional, Delrez, Laetitia, additional, Demangeon, Olivier, additional, Demory, Brice-Olivier, additional, Dragomir, Diana, additional, Dransfield, Georgina, additional, Ehrenreich, David, additional, Erikson, Anders, additional, Fortier, Andrea, additional, Gan, Tianjun, additional, Gill, Samuel, additional, Gillon, Michaël, additional, Gnilka, Crystal L, additional, Grieves, Nolan, additional, Grziwa, Sascha, additional, Güdel, Manuel, additional, Guillot, Tristan, additional, Haldemann, Jonas, additional, Heng, Kevin, additional, Horne, Keith, additional, Howell, Steve B, additional, Isaak, Kate G, additional, Jenkins, Jon M, additional, Jensen, Eric L N, additional, Kiss, Laszlo, additional, Lacedelli, Gaia, additional, Lam, Kristine, additional, Laskar, Jacques, additional, Latham, David W, additional, Lecavelier des Etangs, Alain, additional, Lendl, Monika, additional, Lester, Kathryn V, additional, Levine, Alan M, additional, Livingston, John, additional, Lovis, Christophe, additional, Luque, Rafael, additional, Magrin, Demetrio, additional, Marie-Sainte, Wenceslas, additional, Maxted, Pierre F L, additional, Mayo, Andrew W, additional, McLean, Brian, additional, Mecina, Marko, additional, Mékarnia, Djamel, additional, Nascimbeni, Valerio, additional, Nielsen, Louise D, additional, Olofsson, Göran, additional, Osborn, Hugh P, additional, Osborne, Hannah L M, additional, Ottensamer, Roland, additional, Pagano, Isabella, additional, Pallé, Enric, additional, Peter, Gisbert, additional, Piotto, Giampaolo, additional, Pollacco, Don, additional, Queloz, Didier, additional, Ragazzoni, Roberto, additional, Rando, Nicola, additional, Rauer, Heike, additional, Redfield, Seth, additional, Ribas, Ignasi, additional, Ricker, George R, additional, Rieder, Martin, additional, Santos, Nuno C, additional, Scandariato, Gaetano, additional, Schmider, François-Xavier, additional, Schwarz, Richard P, additional, Scott, Nicholas J, additional, Seager, Sara, additional, Ségransan, Damien, additional, Serrano, Luisa Maria, additional, Simon, Attila E, additional, Smith, Alexis M S, additional, Steller, Manfred, additional, Stockdale, Chris, additional, Szabó, Gyula, additional, Thomas, Nicolas, additional, Ting, Eric B, additional, Triaud, Amaury H M J, additional, Udry, Stéphane, additional, Van Eylen, Vincent, additional, Van Grootel, Valérie, additional, Vanderspek, Roland K, additional, Viotto, Valentina, additional, Walton, Nicholas, additional, and Winn, Joshua N, additional more...

Published
2022
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11. Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops

Author

Maxted, P F L, primary, Ehrenreich, D, additional, Wilson, T G, additional, Alibert, Y, additional, Cameron, A Collier, additional, Hoyer, S, additional, Sousa, S G, additional, Olofsson, G, additional, Bekkelien, A, additional, Deline, A, additional, Delrez, L, additional, Bonfanti, A, additional, Borsato, L, additional, Alonso, R, additional, Anglada Escudé, G, additional, Barrado, D, additional, Barros, S C C, additional, Baumjohann, W, additional, Beck, M, additional, Beck, T, additional, Benz, W, additional, Billot, N, additional, Biondi, F, additional, Bonfils, X, additional, Brandeker, A, additional, Broeg, C, additional, Bárczy, T, additional, Cabrera, J, additional, Charnoz, S, additional, Corral Van Damme, C, additional, Csizmadia, Sz, additional, Davies, M B, additional, Deleuil, M, additional, Demangeon, O D S, additional, Demory, B-O, additional, Erikson, A, additional, Florén, H G, additional, Fortier, A, additional, Fossati, L, additional, Fridlund, M, additional, Futyan, D, additional, Gandolfi, D, additional, Gillon, M, additional, Guedel, M, additional, Guterman, P, additional, Heng, K, additional, Isaak, K G, additional, Kiss, L, additional, Laskar, J, additional, Lecavelier des Etangs, A, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, Nascimbeni, V, additional, Ottensamer, R, additional, Pagano, I, additional, Pallé, E, additional, Peter, G, additional, Piotto, G, additional, Pollacco, D, additional, Pozuelos, F J, additional, Queloz, D, additional, Ragazzoni, R, additional, Rando, N, additional, Rauer, H, additional, Reimers, C, additional, Ribas, I, additional, Salmon, S, additional, Santos, N C, additional, Scandariato, G, additional, Simon, A E, additional, Smith, A M S, additional, Steller, M, additional, Swayne, M I, additional, Szabó, Gy M, additional, Ségransan, D, additional, Thomas, N, additional, Udry, S, additional, Van Grootel, V, additional, and Walton, N A, additional more...

Published
2021
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12. The EBLM project-VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves

Author

Swayne, MI, Maxted, PFL, Triaud, AHMJ, Sousa, SG, Broeg, C, Florén, HG, Guterman, P, Simon, AE, Boisse, I, Bonfanti, A, Martin, D, Santerne, A, Salmon, S, Standing, MR, Van Grootel, V, Wilson, TG, Alibert, Y, Alonso, R, Anglada Escudé, G, Asquier, J, Bárczy, T, Barrado, D, Barros, SCC, Battley, M, Baumjohann, W, Beck, M, Beck, T, Bekkelien, A, Benz, W, Billot, N, Bonfils, X, Brandeker, A, Busch, MD, Cabrera, J, Charnoz, S, Collier Cameron, A, Csizmadia, S, Davies, MB, Deleuil, M, Deline, A, Delrez, L, Demangeon, ODS, Demory, BO, Dransfield, G, Ehrenreich, D, Erikson, A, Fortier, A, Fossati, L, Fridlund, M, Futyan, D, Gandolfi, D, Gillon, M, Guedel, M, Hébrard, G, Heidari, N, Hellier, C, Heng, K, Hobson, M, Hoyer, S, Isaak, KG, Kiss, L, Kunovac Hodžić, V, Lalitha, S, Laskar, J, Lecavelier Des Etangs, A, Lendl, M, Lovis, C, Magrin, D, Marafatto, L, McCormac, J, Miller, N, Nascimbeni, V, Olofsson, G, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Santos, NC, Scandariato, G, Ségransan, D, Smith, AMS, Steinberger, M, Steller, M, Szabó, GM, Thomas, N, Udry, S, Walter, I, Walton, NA, Willett, E, Swayne, MI [0000-0002-2609-3159], Triaud, AHMJ [0000-0002-5510-8751], Sousa, SG [0000-0001-9047-2965], Santerne, A [0000-0002-3586-1316], Wilson, TG [0000-0001-8749-1962], Battley, M [0000-0002-1357-9774], Baumjohann, W [0000-0001-6271-0110], Collier Cameron, A [0000-0002-8863-7828], Csizmadia, S [0000-0001-6803-9698], Delrez, L [0000-0001-6108-4808], Fridlund, M [0000-0002-0855-8426], Gandolfi, D [0000-0001-8627-9628], Hoyer, S [0000-0003-3477-2466], Lendl, M [0000-0001-9699-1459], Miller, N [0000-0001-9550-1198], and Apollo - University of Cambridge Repository more...

Subjects
techniques: photometric, stars: low-mass, Astrophysics::Solar and Stellar Astrophysics, binaries: eclipsing, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, stars: fundamental parameters, Astrophysics::Galaxy Astrophysics, techniques: spectroscopic
Abstract

The accuracy of theoretical mass, radius and effective temperature values for M-dwarf stars is an active topic of debate. Differences between observed and theoretical values have raised the possibility that current theoretical stellar structure and evolution models are inaccurate towards the low-mass end of the main sequence. To explore this issue we use the CHEOPS satellite to obtain high-precision light curves of eclipsing binaries with low mass stellar companions. We use these light curves combined with the spectroscopic orbit for the solar-type companion to measure the mass, radius and effective temperature of the M-dwarf star. Here we present the analysis of three eclipsing binaries. We use the pycheops data analysis software to fit the observed transit and eclipse events of each system. Two of our systems were also observed by the TESS satellite -- we similarly analyse these light curves for comparison. We find consistent results between CHEOPS and TESS, presenting three stellar radii and two stellar effective temperature values of low-mass stellar objects. These initial results from our on-going observing programme with CHEOPS show that we can expect to have ~24 new mass, radius and effective temperature measurements for very low mass stars within the next few years. more...

Published
2021

13. Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets

Author

Borsato, L, primary, Piotto, G, additional, Gandolfi, D, additional, Nascimbeni, V, additional, Lacedelli, G, additional, Marzari, F, additional, Billot, N, additional, Maxted, P F L, additional, Sousa, S, additional, Cameron, A C, additional, Bonfanti, A, additional, Wilson, T G, additional, Serrano, L M, additional, Garai, Z, additional, Alibert, Y, additional, Alonso, R, additional, Asquier, J, additional, Bárczy, T, additional, Bandy, 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, Brandeker, A, additional, Broeg, C, additional, Cabrera, J, additional, Charnoz, S, additional, Csizmadia, S, additional, Davies, M B, additional, Deleuil, M, additional, Delrez, L, additional, Demangeon, O, additional, Demory, B-O, additional, des Etangs, A L, additional, Ehrenreich, D, additional, Erikson, A, additional, Escudé, G A, additional, Fortier, A, additional, Fossati, L, additional, Fridlund, M, additional, Gillon, M, additional, Guedel, M, additional, Hasiba, J, additional, Heng, K, additional, Hoyer, S, additional, Isaak, K G, additional, Kiss, L, additional, Kopp, E, additional, Laskar, J, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, Munari, M, additional, Olofsson, G, additional, Ottensamer, R, additional, Pagano, I, additional, Pallé, E, additional, Peter, G, additional, Pollacco, D, additional, Queloz, D, additional, Ragazzoni, R, additional, Rando, N, additional, Rauer, H, additional, Ribas, I, additional, Ségransan, D, additional, Santos, N C, additional, Scandariato, G, additional, Simon, A, additional, Smith, A M S, additional, Steller, M, additional, Szabó, G, additional, Thomas, N, additional, Udry, S, additional, Van Grootel, V, additional, and Walton, N, additional more...

Published
2021
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14. The EBLM project – VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves

Author

Swayne, M I, primary, Maxted, P F L, additional, Triaud, A H M J, additional, Sousa, S G, additional, Broeg, C, additional, Florén, H-G, additional, Guterman, P, additional, Simon, A E, additional, Boisse, I, additional, Bonfanti, A, additional, Martin, D, additional, Santerne, A, additional, Salmon, S, additional, Standing, M R, additional, Van Grootel, V, additional, Wilson, T G, additional, Alibert, Y, additional, Alonso, R, additional, Anglada Escudé, G, additional, Asquier, J, additional, Bárczy, T, additional, Barrado, D, additional, Barros, S C C, additional, Battley, M, additional, Baumjohann, W, additional, Beck, M, additional, Beck, T, additional, Bekkelien, A, additional, Benz, W, additional, Billot, N, additional, Bonfils, X, additional, Brandeker, A, 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, Deline, A, additional, Delrez, L, additional, Demangeon, O D S, additional, Demory, B-O, additional, Dransfield, G, additional, Ehrenreich, D, additional, Erikson, A, additional, Fortier, A, additional, Fossati, L, additional, Fridlund, M, additional, Futyan, D, additional, Gandolfi, D, additional, Gillon, M, additional, Guedel, M, additional, Hébrard, G, additional, Heidari, N, additional, Hellier, C, additional, Heng, K, additional, Hobson, M, additional, Hoyer, S, additional, Isaak, K G, additional, Kiss, L, additional, Kunovac Hodžić, V, additional, Lalitha, S, additional, Laskar, J, additional, Lecavelier des Etangs, A, additional, Lendl, M, additional, Lovis, C, additional, Magrin, D, additional, Marafatto, L, additional, McCormac, J, additional, Miller, N, 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, Smith, A M S, additional, Steinberger, M, additional, Steller, M, additional, Szabó, Gy M, additional, Thomas, N, additional, Udry, S, additional, Walter, I, additional, Walton, N A, additional, and Willett, E, additional more...

Published
2021
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15. The EBLM Project– XI. Mass, radius, and effective temperature measurements for 23 M-dwarf companions to solar-type stars observed with CHEOPS

Author

Swayne, M I, Maxted, P F L, Triaud, A H M J, Sousa, S G, Deline, A, Ehrenreich, D, Hoyer, S, Olofsson, G, Boisse, I, Duck, A, Gill, S, Martin, D, McCormac, J, Persson, C M, Santerne, A, Sebastian, D, Standing, M R, Acuña, L, Alibert, Y, Alonso, R, Anglada, G, Bárczy, T, Barrado Navascues, D, Barros, S C C, Baumjohann, W, Baycroft, T A, Beck, M, Beck, T, Benz, W, Billot, N, Bonfils, X, Borsato, L, Bourrier, V, Brandeker, A, Broeg, C, Carmona, A, Charnoz, S, Collier Cameron, A, Cortés-Zuleta, P, Csizmadia, Sz, Cubillos, P E, Davies, M B, Deleuil, M, Delfosse, X, Delrez, L, Demangeon, O D S, Demory, B -O, Dransfield, G, Erikson, A, Fortier, A, Forveille, T, Fossati, L, Fridlund, M, Gandolfi, D, Gillon, M, Güdel, M, Günther, M N, Hara, N, Hébrard, G, Heidari, N, Hellier, C, Helling, Ch, Isaak, K G, Kerschbaum, F, Kiefer, F, Kiss, L L, Kunovac, V, Lalitha, S, Lam, K W F, Laskar, J, Lecavelier des Etangs, A, Lendl, M, Magrin, D, Marafatto, L, Martioli, E, Miller, N J, Mordasini, C, Moutou, C, Nascimbeni, V, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piazza, D, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Santos, N C, Scandariato, G, Ségransan, D, Simon, A E, Smith, A M S, Southworth, R, Stalport, M, Szabó, Gy M, Thomas, N, Udry, S, Ulmer, B, Van Grootel, V, Venturini, J, Walton, N A, Willett, E, Wilson, T G, Swayne, M I, Maxted, P F L, Triaud, A H M J, Sousa, S G, Deline, A, Ehrenreich, D, Hoyer, S, Olofsson, G, Boisse, I, Duck, A, Gill, S, Martin, D, McCormac, J, Persson, C M, Santerne, A, Sebastian, D, Standing, M R, Acuña, L, Alibert, Y, Alonso, R, Anglada, G, Bárczy, T, Barrado Navascues, D, Barros, S C C, Baumjohann, W, Baycroft, T A, Beck, M, Beck, T, Benz, W, Billot, N, Bonfils, X, Borsato, L, Bourrier, V, Brandeker, A, Broeg, C, Carmona, A, Charnoz, S, Collier Cameron, A, Cortés-Zuleta, P, Csizmadia, Sz, Cubillos, P E, Davies, M B, Deleuil, M, Delfosse, X, Delrez, L, Demangeon, O D S, Demory, B -O, Dransfield, G, Erikson, A, Fortier, A, Forveille, T, Fossati, L, Fridlund, M, Gandolfi, D, Gillon, M, Güdel, M, Günther, M N, Hara, N, Hébrard, G, Heidari, N, Hellier, C, Helling, Ch, Isaak, K G, Kerschbaum, F, Kiefer, F, Kiss, L L, Kunovac, V, Lalitha, S, Lam, K W F, Laskar, J, Lecavelier des Etangs, A, Lendl, M, Magrin, D, Marafatto, L, Martioli, E, Miller, N J, Mordasini, C, Moutou, C, Nascimbeni, V, Ottensamer, R, Pagano, I, Pallé, E, Peter, G, Piazza, D, Piotto, G, Pollacco, D, Queloz, D, Ragazzoni, R, Rando, N, Rauer, H, Ribas, I, Santos, N C, Scandariato, G, Ségransan, D, Simon, A E, Smith, A M S, Southworth, R, Stalport, M, Szabó, Gy M, Thomas, N, Udry, S, Ulmer, B, Van Grootel, V, Venturini, J, Walton, N A, Willett, E, and Wilson, T G more...

Abstract

Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ‘radius inflation’ problem could have an impact on both stellar and exoplanetary science. We present the final results of our observation programme with the CHaracterising ExOPlanet Satellite (CHEOPS) to obtain high-precision light curves of eclipsing binaries with low-mass stellar companions (EBLMs). Combined with the spectroscopic orbits of the solar-type companions, we can derive the masses, radii, and effective temperatures of 23 M-dwarf stars. We use the pycheops data analysis software to analyse their primary and secondary occultations. For all but one target, we also perform analyses with Transiting Exoplanet Survey Satellite (TESS) light curves for comparison. We have assessed the impact of starspot-induced variation on our derived parameters and account for this in our radius and effective temperature uncertainties using simulated light curves. We observe trends in inflation with both metallicity and orbital separation. We also observe a strong trend in the difference between theoretical and observational effective temperatures with metallicity. There is no such trend with orbital separation. These results are not consistent with the idea that the observed inflation in stellar radius combines with lower effective temperature to preserve the luminosity predicted by low-mass stellar models. Our EBLM systems provide high-quality and homogeneous measurements that can be used in further studies of radius inflation. more...