methods: data analysis; software: data analysis; software: public release; planets and satellites: fundamental parameters; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] CHEOPS (CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photometry. Here we report the analysis of transits observed by CHEOPS during its Early Science observing programme for four well-known exoplanets: GJ 436 b, HD 106315 b, HD 97658 b and GJ 1132 b. The analysis is done using PYCHEOPS, an open-source software package we have developed to easily and efficiently analyse CHEOPS light curve data using state-of-the-art techniques that are fully described herein. We show that the precision of the transit parameters measured using CHEOPS is comparable to that from larger space telescopes such as Spitzer Space Telescope and Kepler. We use the updated planet parameters from our analysis to derive new constraints on the internal structure of these four exoplanets.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Maxted, P. F. L.; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Ehrenreich, D.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Wilson, T. G.; Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Alibert, Y.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Collier Cameron, A.; Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
Hoyer, S.; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
Sousa, S. G.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
Olofsson, G.; Department of Astronomy, Stockholm University, AlbaNova University Center, 10691 Stockholm, Sweden
Bekkelien, A.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Deline, A.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Delrez, Laetitia ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Bonfanti, A.; Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
Alonso, R.; Instituto de Astrofí sica de Canarias, 38200 La Laguna, Tenerife, Spain ; Departamento de Astrofí sica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
Anglada Escudé, G.; Institut de Ciències de l'Espai (ICE, CSIC), Campus UAB, Can Magrans s/n, 08193 Bellaterra, Spain ; Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
Barrado, D.; Depto. de Astrofísica, Centro de Astrobiologia (CSIC-INTA), ESAC campus, 28692 Villanueva de la Cãda (Madrid), Spain
Barros, S. C. C.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
Baumjohann, W.; Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
Beck, M.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Beck, T.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Benz, W.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland ; Center for Space and Habitability, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Billot, N.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Biondi, F.; INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy ; Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse 1, 85748 Garching, Germany
Bonfils, X.; Université Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
Brandeker, A.; Department of Astronomy, Stockholm University, AlbaNova University Center, 10691 Stockholm, Sweden
Broeg, C.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland ; Center for Space and Habitability, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Bárczy, T.; Admatis, Miskok, Hungary
Cabrera, J.; Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany
Charnoz, S.; Université de Paris, Institut de physique du globe de Paris, CNRS, F-75005 Paris, France
Corral Van Damme, C.; ESTEC, European Space Agency, 2201AZ, Noordwijk, NL
Csizmadia, Sz; Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany
Davies, M. B.; Lund Observatory, Dept. of Astronomy and Theoretical Physics, Lund University, Box 43, 22100 Lund, Sweden
Deleuil, M.; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
Demangeon, O. D. S.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
Demory, B.-O.; Center for Space and Habitability, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Erikson, A.; Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany
Florén, H. G.; Department of Astronomy, Stockholm University, AlbaNova University Center, 10691 Stockholm, Sweden
Fortier, A.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland ; Center for Space and Habitability, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Fossati, L.; Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
Fridlund, M.; Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands ; Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, 43992 Onsala, Sweden
Futyan, D.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Gandolfi, D.; Dipartimento di Fisica, Universitá degli Studi di Torino, via Pietro Giuria 1, I-10125, Torino, Italy
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Guedel, M.; University of Vienna, Department of Astrophysics, Türkenschanzstrasse 17, 1180 Vienna, Austria
Guterman, P.; Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France ; Division Technique INSU, BP 330, 83507 La Seyne cedex, France
Heng, K.; Center for Space and Habitability, Gesellsschaftstrasse 6, 3012 Bern, Switzerland ; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
Isaak, K. G.; Science and Operations Department - Science Division (SCI-SC), Directorate of Science, European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, 2201-AZ Noordwijk, The Netherlands
Kiss, L.; Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, 1121 Budapest, Konkoly Thege Miklós út 15-17, Hungary
Laskar, J.; IMCCE, UMR8028 CNRS, Observatoire de Paris, PSL Univ., Sorbonne Univ., 77 av. Denfert-Rochereau, 75014 Paris, France
Lecavelier des Etangs, A.; Institut d'astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis blvd. Arago, 75014 Paris, France
Lendl, M.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Lovis, C.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Ottensamer, R.; Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, 1180 Vienna, Austria
Pagano, I.; INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy
Pallé, E.; Instituto de Astrofí sica de Canarias, 38200 La Laguna, Tenerife, Spain ; Departamento de Astrofí sica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
Peter, G.; Institute of Optical Sensor Systems, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany
Piotto, G.; INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy ; Dipartimento di Fisica e Astronomia "Galileo Galilei", Université degli Studi di Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Pollacco, D.; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
Pozuelos, F. J.; Astrobiology Research Unit, Université de Liège, Allée du 6 Août 19C, B-4000 Liége, Belgium ; Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 19C, 4000 Liège, Belgium
Queloz, D.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland ; Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK
Ragazzoni, R.; INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy ; Dipartimento di Fisica e Astronomia "Galileo Galilei", Université degli Studi di Padova, Vicolo dell'Osservatorio 3, 35122 Padova, Italy
Rando, N.; ESTEC, European Space Agency, 2201AZ, Noordwijk, NL
Rauer, H.; Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany ; Center for Astronomy and Astrophysics, Technical University Berlin, Hardenberstrasse 36, 10623 Berlin, Germany ; Institut für Geologische Wissenschaften, Freie Universitát Berlin, 12249 Berlin, Germany
Reimers, C.; Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, 1180 Vienna, Austria
Ribas, I.; Institut de Ciències de l'Espai (ICE, CSIC), Campus UAB, Can Magrans s/n, 08193 Bellaterra, Spain ; Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
Santos, N. C.; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal ; Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
Scandariato, G.; INAF, Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania, Italy
Simon, Antoine; University of Bern > Physikalisches Institut
Smith, A. M. S.; Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstrasse 2, 12489 Berlin, Germany
Steller, M.; Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, A-8042 Graz, Austria
Swayne, M. I.; Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Szabó, Gy M.; ELTE Eötvös Loránd University, Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112, Hungary ; MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary
Ségransan, D.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Thomas, N.; Physikalisches Institut, University of Bern, Gesellsschaftstrasse 6, 3012 Bern, Switzerland
Udry, S.; Department of Astronomy, University of Geneva, Chemin Pegasi 51, Versoix, Switzerland
Van Grootel, Valérie ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Walton, N. A.; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom)
Akinsanmi B., Barros S. C. C., Santos N. C., Correia A. C. M., Maxted P. F. L., Boué G., Laskar J., 2019, A&A, 621, A117
Allard F., 2014, in Booth M., Matthews B. C., Graham J. R., eds, Proc. IAU Symp. 299, Exploring the Formation and Evolution of Planetary Systems. Kluwer, Dordrecht, p. 271
Allard F., Homeier D., Freytag B., 2011, in Johns-Krull C., Browning M. K., West A. A., eds, ASP Conf. Ser. Vol. 448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun. p. Astron. Soc. Pac., San Francisco, p. 91
Anderson D. R. et al., 2011, ApJ, 726, L19
Antoniadis-Karnavas A., Sousa S. G., Delgado-Mena E., Santos N. C., Teixeira G. D. C., Neves V., 2020, A&A, 636, A9
Asplund M., Grevesse N., Sauval A. J., Scott P., 2009, ARA&A, 47, 481
Baglin A., Auvergne M., Barge P., Deleuil M, Michel E., CoRoT Exoplanet Science Team, 2009, Proc. IAU Symp. 253, Transiting Planets. Cambridge Univ. Press, Cambridge, p.71
Bakos G. A. et al., 2007, ApJ, 656, 552
Baraffe I., Homeier D., Allard F., Chabrier G., 2015, A&A, 577, A42
Barros S. C. C. et al., 2017, A&A, 608, A25
Beaulieu J.-P. et al., 2011, ApJ, 731, 16
Benedict G. F. et al., 2016, AJ, 152, 141
Benz W., Ehrenreich D., Isaak K., 2018, Deeg H. J., Belmonte J. A., eds, Handbook of Exoplanets. Springer International Publishing, Cham, p. 84
Benz W. et al., 2021, Exp. Astron., 51, 109
Berta-Thompson Z. K. et al., 2015, Nature, 527, 204
Blackwell D. E., Shallis M. J., 1977, MNRAS, 180, 177
Bonfanti A., Ortolani S., Nascimbeni V., 2016, A&A, 585, A5
Bonfanti A. et al., 2021, A&A, 646, A157
Bonfils X. et al., 2018, A&A, 618, A142
Borsato L. et al., 2021, MNRAS, 506, 3810
Borucki W. J. et al., 2010, Science, 327, 977
Bourrier V. et al., 2018, Nature, 553, 477
Brewer J. M., Fischer D. A., Valenti J. A., Piskunov N., 2016, ApJS, 225, 32
Butler R. P., Vogt S. S., Marcy G. W., Fischer D. A., Wright J. T., Henry G. W., Laughlin G., Lissauer J. J., 2004, ApJ, 617, 580
Carter J. A., Yee J. C., Eastman J., Gaudi B. S., Winn J. N., 2008, ApJ, 689, 499
Casewell S. L. et al., 2018, MNRAS, 481, 1897
Castelli F., Kurucz R. L., 2003, in Piskunov N., Weiss W. W., Gray D. F., eds, Proc. IAU Symp. 210, Modelling of Stellar Atmospheres. Kluwer, Dordrecht, p. A20
Charbonneau D. et al., 2009, Nature, 462, 891
Chaturvedi P., Sharma R., Chakraborty A., Anandarao B. G., Prasad N. J. S. S. V., 2018, AJ, 156, 27
Claret A., 2019, Res. Notes Am. Astron. Soc., 3, 17
Crossfield I. J. M. et al., 2017, AJ, 153, 255
Delrez L. et al., 2018, in Marshall H. K., Spyromilio J., eds, Proc. SPIE Conf. Ser. Vol. 10700, Ground-based and Airborne Telescopes VII. SPIE, Bellingham, p. 107001I
Delrez L. et al., 2021, Nat. Astron., 5, 775
Diamond-Lowe H., Berta-Thompson Z., Charbonneau D., Kempton E. M.-R., 2018, AJ, 156, 42
Dickey J. M., Lientz B., 1970, Ann. Math. Statist., 41, 214
Dittmann J. A., Irwin J. M., Charbonneau D., Berta-Thompson Z. K., Newton E. R., 2017, AJ, 154, 142
dos Santos L. A. et al., 2019, A&A, 629, A47
Dragomir D. et al., 2013, ApJ, 772, L2
Eastman J., Gaudi B. S., Agol E., 2013, PASP, 125, 83
Ehrenreich D. et al., 2015, Nature, 522, 459
Fei Y., Murphy C., Shibazaki Y., Shahar A., Huang H., 2016, Geophys. Res. Lett., 43, 6837
Foreman-Mackey D., 2016, J. Open Source Softw., 1, 24
Foreman-Mackey D., 2018, Res. Notes Am. Astron. Soc., 2, 31
Foreman-Mackey D., Hogg D. W., Lang D., Goodman J., 2013, PASP, 125, 306
Foreman-Mackey D., Agol E., Ambikasaran S., Angus R., 2017, AJ, 154, 220
Fridlund M. et al., 2017, A&A, 604, A16
Gaia Collaboration, 2018, A&A, 616, A1
Gaia Collaboration, 2021, A&A, 649, A1
Gardner J. P. et al., 2006, Space Sci. Rev., 123, 485
Hakim K., Rivoldini A., Van Hoolst T., Cottenier S., Jaeken J., Chust T., Steinle-Neumann G., 2018, Icarus, 313, 61
Haldemann J., Alibert Y., Mordasini C., Benz W., 2020, A&A, 643, A105
Harris C. R. et al., 2020, Nature, 585, 357
Hartman J. D. et al., 2015, AJ, 149, 166
Henry G. W., Howard A. W., Marcy G. W., Fischer D. A., Johnson J. A., 2011, preprint(arXiv:1109.2549)
Howard A. W. et al., 2011, ApJ, 730, 10
Howell S. B. et al., 2014, PASP, 126, 398
Hoyer S., Guterman P., Demangeon O., Sousa S. G., Deleuil M., Meunier J. C., Benz W., 2020, A&A, 635, A24
Hunter J. D., 2007, Comput. Sci. Eng., 9, 90
Kallinger T. et al., 2014, A&A, 570, A41
Kipping D. M., 2014, MNRAS, 440, 2164
Knutson H. A. et al., 2011, ApJ, 735, 27
Knutson H. A., Benneke B., Deming D., Homeier D., 2014, Nature, 505, 66
Kosiarek M. R. et al., 2021, AJ, 161, 47
Kulow J. R., France K., Linsky J., Loyd R. O. P., 2014, ApJ, 786, 132
Kurucz R. L., 2013, Astrophysics Source Code Library, recod (ascl:1303.024)
Lacy C. H. S., 1992, AJ, 104, 2213
Lam S. K., Pitrou A., Seibert S., 2015, in Proc. 2nd Workshop on the LLVM Compiler Infrastructure in HPC. Association for Computing Machinery, New York, p. 1
Lanotte A. A. et al., 2014, A&A, 572, A73
Lavie B. et al., 2017, A&A, 605, L7
Leleu A. et al., 2021, A&A, 649, A26
Lendl M. et al., 2020, A&A, 643, A94
Lindegren L. et al., 2021, A&A, 649, A4
Lopez E. D., Fortney J. J., 2014, ApJ, 792, 1
Lothringer J. D. et al., 2018, AJ, 155, 66
Luger R., Foreman-Mackey D., Hogg D. W., 2017, Res. Notes Am. Astron. Soc., 1, 7
Magic Z., Chiavassa A., Collet R., Asplund M., 2015, A&A, 573, A90
Mamajek E. E. et al., 2015, preprint (arXiv:1510.07674)
Maness H. L., Marcy G. W., Ford E. B., Hauschildt P. H., Shreve A. T., Basri G. B., Butler R. P., Vogt S. S., 2007, PASP, 119, 90
Marconi A. et al., 2021, The Messenger, 182, 27
Marigo P. et al., 2017, ApJ, 835, 77
Markley F. L., 1995, Celest. Mech. Dyn. Astron., 63, 101
Maxted P. F. L., 2016, A&A, 591, A111
Maxted P. F. L., 2018, A&A, 616, A39
Maxted P. F. L., Gill S., 2019, A&A, 622, A33
Morales J. C. et al., 2009, ApJ, 691, 1400
Morello G., Waldmann I. P., Tinetti G., Howarth I. D., Micela G., Allard F., 2015, ApJ, 802, 117
Morris B. M. et al., 2021, A&A, 653, A173
Mortier A., Santos N. C., Sousa S. G., Fernandes J. M., Adibekyan V. Z., Delgado Mena E., Montalto M., Israelian G., 2013, A&A, 558, A106
Moya A., Zuccarino F., Chaplin W. J., Davies G. R., 2018, ApJS, 237, 21
Mugnai L. V. et al., 2021, AJ, 161, 284
Newville M. et al., 2020, lmfit/lmfit-py 1.0.1. Zenodo, available at https://doi.org/10.5281/zenodo.3814709
Pepper J., Stassun K. G., Gaudi B. S., 2018, KELT: The Kilodegree Extremely Little Telescope, a Survey for Exoplanets Transiting Bright, Hot Stars. Springer Science and Business Media LLC, p. 128
Piskunov N. E., Kupka F., Ryabchikova T. A., Weiss W. W., Jeffery C. S., 1995, A&AS, 112, 525
Piskunov N., Valenti J. A., 2017, A&A, 597, A16
Pollacco D. L. et al., 2006, PASP, 118, 1407
Pont F., Gilliland R. L., Knutson H., Holman M., Charbonneau D., 2009, MNRAS, 393, L6
Rabus M. et al., 2019, MNRAS, 484, 2674
Rando N. et al., 2020, in Lystrup M., Perrin M. D., eds, Proc. SPIE Conf. Ser. Vol. 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave. SPIE, Belligham, p. 1144314
Rauer H. et al., 2014, Exp. Astron., 38, 249
Ribas I., Font-Ribera A., Beaulieu J.-P., 2008, ApJ, 677, L59
Ricker G. R. et al., 2014, in Oschmann J. M., Jr., Clampin M., Fazio G. G., MacEwen H. A., eds, Proc. SPIE Conf. Ser. Vol. 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wa v e. SPIE, Bellingham, p. 914320
Rodriguez J. E. et al., 2017, AJ, 153, 256
Santos N. C. et al., 2013, A&A, 556, A150
Schweitzer A. et al., 2019, A&A, 625, A68
Scuflaire R., Théado S., Montalbán J., Miglio A., Bourge P.-O., Godart M., Thoul A., Noels A., 2008, Ap&SS, 316, 83
Short D. R., Welsh W. F., Orosz J. A., Windmiller G., Maxted P. F. L., 2019, Res. Notes Am. Astron. Soc., 3, 117
Sivia D. S., Skilling J., 2006, Data Analysis-A Bayesian Tutorial, 2nd edn. Oxford Science Publications, Oxford Univ. Press, Oxford
Skrutskie M. F. et al., 2006, AJ, 131, 1163
Snellen I. A. G. et al., 2012, in Stepp L. M, Gilmozzi R., Hall J. H., eds, Proc. SPIE Conf. Ser. Vol. 8444, Ground-based and Airborne Telescopes IV. SPIE, Bellingham, p. 84440I
Sotin C., Grasset O., Mocquet A., 2007, Icarus, 191, 337
Sousa S. G. et al., 2018, A&A, 620, A58
Sousa S. G., 2014, ARES + MOOG: A Practical Overview of an Equivalent Width (EW) Method to Derive Stellar Parameters. Springer International Publishing, Cham, p. 297
