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  • Brandeker, AlexisStockholms universitet,Stockholm University,Institutionen för astronomi (author)

CHEOPS geometric albedo of the hot Jupiter HD 209458 b

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-03-02
  • EDP Sciences,2022

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:fcdc203e-c82b-4526-88a7-0c807036f4b7
  • https://doi.org/10.1051/0004-6361/202243082DOI
  • https://research.chalmers.se/publication/529123URI
  • https://lup.lub.lu.se/record/91bb7715-a58f-406f-b08f-a8749545dbf3URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-203177URI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We report the detection of the secondary eclipse of the hot Jupiter HD 209458 b in optical/visible light using the CHEOPS space telescope. Our measurement of 20.4+3.2-3.3 parts per million translates into a geometric albedo of Ag = 0.096 ± 0.016. The previously estimated dayside temperature of about 1500 K implies that our geometric albedo measurement consists predominantly of reflected starlight and is largely uncontaminated by thermal emission. This makes the present result one of the most robust measurements of Ag for any exoplanet. Our calculations of the bandpass-integrated geometric albedo demonstrate that the measured value of Ag is consistent with a cloud-free atmosphere, where starlight is reflected via Rayleigh scattering by hydrogen molecules, and the water and sodium abundances are consistent with stellar metallicity. We predict that the bandpass-integrated TESS geometric albedo is too faint to detect and that a phase curve of HD 209458 b observed by CHEOPS would have a distinct shape associated with Rayleigh scattering if the atmosphere is indeed cloud free.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Heng, KevinThe University of Warwick,Universität Bern,University of Bern (author)
  • Lendl, M.Université de Genève,University of Geneva (author)
  • Patel, Jayshil AshokkumarStockholms universitet,Institutionen för astronomi(Swepub:su)japa6985 (author)
  • Davies, M.B.Lund University,Lunds universitet,Matematik (naturvetenskapliga fakulteten),Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematics (Faculty of Sciences),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)astr-mda (author)
  • Broeg, C.Universität Bern,University of Bern (author)
  • Guterman, P.Laboratoire d'Astrophysique de Marseille (author)
  • Beck, M.Université de Genève,University of Geneva (author)
  • Maxted, P.Keele University (author)
  • Demangeon, O.Universidade do Porto,University of Porto (author)
  • Delrez, L.Universite de Liège,University of Liège (author)
  • Demory, B.O.Universität Bern,University of Bern (author)
  • Kitzmann, D.Universität Bern,University of Bern (author)
  • Santos, N. C.Universidade do Porto,University of Porto (author)
  • Singh, V.Istituto nazionale di astrofisica (INAF) (author)
  • Alibert, Y.Universität Bern,University of Bern (author)
  • Alonso, R.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Anglada, G.Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC) (author)
  • Bárczy, T. (author)
  • Barrado, D.Centro de Astrobiologia (CAB) (author)
  • Barros, S.C.C.Universidade do Porto,University of Porto (author)
  • Baumjohann, W. (author)
  • Beck, T.Universität Bern,University of Bern (author)
  • Benz, W.Universität Bern,University of Bern (author)
  • Billot, N.Université de Genève,University of Geneva (author)
  • Bonfils, X.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Bruno, G.Universität Bern,University of Bern (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Charnoz, S. (author)
  • Collier Cameron, A.University of St Andrews (author)
  • Corral Van Damme, C.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Davies, M. B.Lunds universitet,Lund University (author)
  • Deleuil, M.Laboratoire d'Astrophysique de Marseille (author)
  • Deline, A.Université de Genève,University of Geneva (author)
  • Ehrenreich, D.Université de Genève,University of Geneva (author)
  • Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Farinato, J.Istituto nazionale di astrofisica (INAF) (author)
  • Fortier, A.Universität Bern,University of Bern (author)
  • Fossati, L. (author)
  • Fridlund, Malcolm,1952Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Gillon, MichaëlUniversite de Liège,University of Liège (author)
  • Gudel, M.Universität Wien,University of Vienna (author)
  • Hoyer, S.Laboratoire d'Astrophysique de Marseille (author)
  • Isaak, K.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Kiss, L.L.Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE) (author)
  • Laskar, J.Observatoire de Paris,Paris Observatory (author)
  • des Etangs, A. L.Institut d 'Astrophysique de Paris (author)
  • Lovis, C.Université de Genève,University of Geneva (author)
  • Luntzer, A.Universität Wien,University of Vienna (author)
  • Magrin, D.Istituto nazionale di astrofisica (INAF) (author)
  • Nascimbeni, ValerioIstituto nazionale di astrofisica (INAF) (author)
  • Olofsson, Göran,1944-Stockholms universitet,Institutionen för astronomi(Swepub:su)olofsson (author)
  • Ottensamer, R.Universität Wien,University of Vienna (author)
  • Pagano, I.Istituto nazionale di astrofisica (INAF) (author)
  • Palle, EnricInstituto de Astrofísica de Canarias (author)
  • Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Piotto, Giampaolo P.Istituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
  • Pollacco, Don L.The University of Warwick (author)
  • Queloz, D.Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH),University Of Cambridge (author)
  • Ragazzoni, RobertoUniversità Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Rando, N.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Rauer, H.Freie Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Technische Universität Berlin (author)
  • Ribas, I.Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC),Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC (author)
  • Scandariato, GaetanoIstituto nazionale di astrofisica (INAF) (author)
  • Segransan, D.Université de Genève,University of Geneva (author)
  • Simon, A.E.Universität Bern,University of Bern (author)
  • Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Sousa, S. G.Universidade do Porto,University of Porto (author)
  • Steller, Manfred B. (author)
  • Szabó, G.M.Eötvös Loránd University (ELTE) (author)
  • Thomas, NicolasUniversität Bern,University of Bern (author)
  • Udry, S.Université de Genève,University of Geneva (author)
  • Van Grootel, V.Universite de Liège,University of Liège (author)
  • Walton, N. A.University Of Cambridge (author)
  • Wolter, D.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),German Aerospace Center (DLR) (author)
  • Stockholm UniversityInstitutionen för astronomi (creator_code:org_t)

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  • In:Astronomy and Astrophysics: EDP Sciences6590004-63611432-0746

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By the author/editor
Brandeker, Alexi ...
Heng, Kevin
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Singh, V.
Alibert, Y.
Alonso, R.
Anglada, G.
Bárczy, T.
Barrado, D.
Barros, S.C.C.
Baumjohann, W.
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