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CHEOPS observations...
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Bonfanti, A.Space Research Institute, AAS
(author)
CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-02-19
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EDP Sciences,2021
Numbers
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LIBRIS-ID:oai:research.chalmers.se:29c6c050-8521-413a-a4cd-3d1192a2a607
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https://doi.org/10.1051/0004-6361/202039608DOI
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https://research.chalmers.se/publication/522564URI
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https://lup.lub.lu.se/record/5b006244-c874-4c1b-a9fe-c56958b403d7URI
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-192459URI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Context. The detection of a super-Earth and three mini-Neptunes transiting the bright (V = 9.2 mag) star HD 108236 (also known as TOI-1233) was recently reported on the basis of TESS and ground-based light curves. Aims. We perform a first characterisation of the HD 108236 planetary system through high-precision CHEOPS photometry and improve the transit ephemerides and system parameters. Methods. We characterise the host star through spectroscopic analysis and derive the radius with the infrared flux method. We constrain the stellar mass and age by combining the results obtained from two sets of stellar evolutionary tracks. We analyse the available TESS light curves and one CHEOPS transit light curve for each known planet in the system. Results. We find that HD 108236 is a Sun-like star with R? = 0.877 ± 0.008 R? , M? = 0.869-0.048+0.050 M? , and an age of 6.7-5.1+4.0 Gyr. We report the serendipitous detection of an additional planet, HD 108236 f, in one of the CHEOPS light curves. For this planet, the combined analysis of the TESS and CHEOPS light curves leads to a tentative orbital period of about 29.5 days. From the light curve analysis, we obtain radii of 1.615 ± 0.051, 2.071 ± 0.052, 2.539-0.065+0.062, 3.083 ± 0.052, and 2.017-0.057+0.052 R? for planets HD 108236 b to HD 108236 f, respectively. These values are in agreement with previous TESS-based estimates, but with an improved precision of about a factor of two. We perform a stability analysis of the system, concluding that the planetary orbits most likely have eccentricities smaller than 0.1. We also employ a planetary atmospheric evolution framework to constrain the masses of the five planets, concluding that HD 108236 b and HD 108236 c should have an Earth-like density, while the outer planets should host a low mean molecular weight envelope. Conclusions. The detection of the fifth planet makes HD 108236 the third system brighter than V = 10 mag to host more than four transiting planets. The longer time span enables us to significantly improve the orbital ephemerides such that the uncertainty on the transit times will be of the order of minutes for the years to come. A comparison of the results obtained from the TESS and CHEOPS light curves indicates that for a V - 9 mag solar-like star and a transit signal of -500 ppm, one CHEOPS transit light curve ensures the same level of photometric precision as eight TESS transits combined, although this conclusion depends on the length and position of the gaps in the light curve.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Delrez, L.Universite de Liège,University of Liège
(author)
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Hooton, M.J.Universität Bern,University of Bern
(author)
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Wilson, T.G.University of St Andrews
(author)
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Fossati, L.
(author)
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Alibert, Y.Universität Bern,University of Bern
(author)
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Hoyer, S.Laboratoire d'Astrophysique de Marseille
(author)
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Mustill, Alexander JLund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-amu
(author)
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Osborn, H. P.Universität Bern,University of Bern
(author)
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Adibekyan, V.Universidade do Porto,University of Porto
(author)
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Gandolfi, D.Istituto nazionale di astrofisica (INAF)
(author)
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Salmon, S.Universite de Liège,University of Liège
(author)
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Sousa, S.G.Universidade do Porto,University of Porto
(author)
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Tuson, A.University Of Cambridge
(author)
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Van Grootel, V.Universite de Liège,University of Liège
(author)
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Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Nascimbeni, ValerioIstituto nazionale di astrofisica (INAF)
(author)
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Maxted, P.Keele University
(author)
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Barros, S.C.C.Universidade do Porto,University of Porto
(author)
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Billot, N.Université de Genève,University of Geneva
(author)
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Bonfils, X.Université Grenoble Alpes,Grenoble Alpes University
(author)
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Borsato, L.Istituto nazionale di astrofisica (INAF)
(author)
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Broeg, C.Universität Bern,University of Bern
(author)
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Davies, Melvyn BLund University,Lunds universitet,LUNARC - Centrum för Tekniska och Vetenskapliga Beräkningar vid Lunds Universitet,Annan verksamhet, LTH,Lunds Tekniska Högskola,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,LUNARC, Centre for Scientific and Technical Computing at Lund University,Other operations, LTH,Faculty of Engineering, LTH,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-mda
(author)
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Deleuil, M.Laboratoire d'Astrophysique de Marseille
(author)
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Demangeon, O.Laboratoire d'Astrophysique de Marseille
(author)
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Fridlund, Malcolm,1952Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri
(author)
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Lacedelli, G.Istituto nazionale di astrofisica (INAF)
(author)
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Lendl, M.Université de Genève,University of Geneva
(author)
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Persson, C. M.
(author)
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Santos, N. C.Universidade do Porto,University of Porto
(author)
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Scandariato, GaetanoIstituto nazionale di astrofisica (INAF)
(author)
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Szabó, G.M.Eötvös Loránd University (ELTE)
(author)
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Collier Cameron, A.University of St Andrews
(author)
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Udry, S.Université de Genève,University of Geneva
(author)
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Benz, W.Universität Bern,University of Bern
(author)
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Beck, M.Université de Genève,University of Geneva
(author)
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Ehrenreich, D.Université de Genève,University of Geneva
(author)
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Fortier, A.Universität Bern,University of Bern
(author)
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Isaak, K.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Queloz, D.Université de Genève,University of Geneva
(author)
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Alonso, R.Instituto de Astrofísica de Canarias
(author)
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Asquier, J.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Bandy, T.Universität Bern,University of Bern
(author)
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Bárczy, T.
(author)
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Barrado, D.Centro de Astrobiologia (CAB)
(author)
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Barragán, O.University Of Oxford
(author)
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Baumjohann, W.
(author)
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Beck, T.Universität Bern,University of Bern
(author)
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Bekkelien, A.Université de Genève,University of Geneva
(author)
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Bergomi, M.Istituto nazionale di astrofisica (INAF)
(author)
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Brandeker, AlexisStockholms universitet,Institutionen för astronomi(Swepub:su)alexis
(author)
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Busch, M.-D.Universität Bern,University of Bern
(author)
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Cessa, V.Universität Bern,University of Bern
(author)
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Charnoz, S.Institut de Physique du Globe de Paris
(author)
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Chazelas, B.Université de Genève,University of Geneva
(author)
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Corral Van Damme, C.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Demory, B.O.Universität Bern,University of Bern
(author)
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Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Farinato, J.Istituto nazionale di astrofisica (INAF)
(author)
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Futyan, D.Université de Genève,University of Geneva
(author)
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Garcia Munoz, A.Technische Universität Berlin
(author)
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Gillon, MichaëlUniversite de Liège,University of Liège
(author)
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Guedel, M.Universität Wien,University of Vienna
(author)
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Guterman, P.Laboratoire d'Astrophysique de Marseille
(author)
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Hasiba, J.
(author)
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Heng, KevinUniversität Bern,University of Bern
(author)
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Hernandez, E.Universität Bern,University of Bern
(author)
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Kiss, L.Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
(author)
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Kuntzer, T.Université de Genève,University of Geneva
(author)
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Laskar, J.Observatoire de Paris,Paris Observatory
(author)
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des Etangs, A. L.Institut d 'Astrophysique de Paris
(author)
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Lovis, C.Université de Genève,University of Geneva
(author)
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Magrin, D.Istituto nazionale di astrofisica (INAF)
(author)
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Malvasio, L.Universität Bern,University of Bern
(author)
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Marafatto, L.Istituto nazionale di astrofisica (INAF)
(author)
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Michaelis, H.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Munari, M.Istituto nazionale di astrofisica (INAF)
(author)
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Olofsson, GöranStockholms universitet,Institutionen för astronomi(Swepub:su)olofsson
(author)
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Ottacher, H.
(author)
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Ottensamer, R.Universität Wien,University of Vienna
(author)
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Pagano, I.Istituto nazionale di astrofisica (INAF)
(author)
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Palle, E.Instituto de Astrofísica de Canarias
(author)
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Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Piazza, D.Universität Bern,University of Bern
(author)
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Piotto, Giampaolo P.Istituto nazionale di astrofisica (INAF)
(author)
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Pollacco, Don L.The University of Warwick
(author)
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Ragazzoni, RobertoIstituto nazionale di astrofisica (INAF)
(author)
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Rando, N.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Ratti, F.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Rauer, H.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Ribas, I.Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC
(author)
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Rieder, M.Universität Bern,University of Bern
(author)
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Rohlfs, R.Université de Genève,University of Geneva
(author)
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Safa, F.European Space Research and Technology Centre (ESA ESTEC)
(author)
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Salatti, M.Agenzia Spaziale Italiana
(author)
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Segransan, D.Université de Genève,University of Geneva
(author)
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Simon, A.E.Universität Bern,University of Bern
(author)
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Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Sordet, M.Université de Genève,University of Geneva
(author)
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Steller, Manfred B.
(author)
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Thomas, NicolasUniversität Bern,University of Bern
(author)
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Tschentscher, M.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Van Eylen, VincentUniversity College London (UCL)
(author)
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Viotto, V.Istituto nazionale di astrofisica (INAF)
(author)
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Walter, I.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Walton, N. A.University Of Cambridge
(author)
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Wildi, F.Université de Genève,University of Geneva
(author)
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Wolter, D.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Space Research Institute, AASUniversite de Liège
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In:Astronomy and Astrophysics: EDP Sciences6460004-63611432-0746
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Bonfanti, A.
-
Delrez, L.
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Hooton, M.J.
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Wilson, T.G.
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Fossati, L.
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Alibert, Y.
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Hoyer, S.
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Mustill, Alexand ...
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Osborn, H. P.
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Adibekyan, V.
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Gandolfi, D.
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Salmon, S.
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Sousa, S.G.
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Tuson, A.
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Van Grootel, V.
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Cabrera, J.
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Nascimbeni, Vale ...
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Maxted, P.
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Barros, S.C.C.
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Billot, N.
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Bonfils, X.
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Broeg, C.
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Davies, Melvyn B
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Deleuil, M.
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Demangeon, O.
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Fridlund, Malcol ...
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Lacedelli, G.
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Lendl, M.
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Persson, C. M.
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Santos, N. C.
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Scandariato, Gae ...
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Szabó, G.M.
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Collier Cameron, ...
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Udry, S.
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Benz, W.
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Beck, M.
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Ehrenreich, D.
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Fortier, A.
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Isaak, K.
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Queloz, D.
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Alonso, R.
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Asquier, J.
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Bandy, T.
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Bárczy, T.
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Barrado, D.
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Barragán, O.
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Baumjohann, W.
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Beck, T.
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Bekkelien, A.
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Bergomi, M.
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Brandeker, Alexi ...
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Busch, M.-D.
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Cessa, V.
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Charnoz, S.
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Chazelas, B.
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Corral Van Damme ...
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Demory, B.O.
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Erikson, Anders
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Farinato, J.
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Futyan, D.
-
Garcia Munoz, A.
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Gillon, Michaël
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Guedel, M.
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Guterman, P.
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Hasiba, J.
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Heng, Kevin
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Hernandez, E.
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Kiss, L.
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Kuntzer, T.
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Laskar, J.
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des Etangs, A. L ...
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Lovis, C.
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Magrin, D.
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Malvasio, L.
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Marafatto, L.
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Michaelis, H.
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Munari, M.
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Olofsson, Göran
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Ottacher, H.
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Ottensamer, R.
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Pagano, I.
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Palle, E.
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Peter, G.
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Piazza, D.
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Piotto, Giampaol ...
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Pollacco, Don L.
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Ragazzoni, Rober ...
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Rando, N.
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Ratti, F.
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Rauer, H.
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Ribas, I.
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Rieder, M.
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Rohlfs, R.
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Safa, F.
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Salatti, M.
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Segransan, D.
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Simon, A.E.
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Smith, Alexis M. ...
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Sordet, M.
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Steller, Manfred ...
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Thomas, Nicolas
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Tschentscher, M.
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Van Eylen, Vince ...
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Viotto, V.
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Walter, I.
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Walton, N. A.
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Wildi, F.
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Wolter, D.
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