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  • Scandariato, GaetanoIstituto nazionale di astrofisica (INAF),INAF-Osservatorio Astronomico di Roma (author)

Phase curve and geometric albedo of WASP-43b measured with CHEOPS, TESS, and HST WFC3/UVIS

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-11-29
  • EDP Sciences,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e40e4399-0ece-4d16-bd77-e5c52c20eaca
  • https://doi.org/10.1051/0004-6361/202243974DOI
  • https://research.chalmers.se/publication/534061URI
  • https://lup.lub.lu.se/record/8bf3d369-15d2-4e37-9155-6b68cab14b40URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-214513URI

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  • Language:English
  • Summary in:English

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

Notes

  • Context. Observations of the phase curves and secondary eclipses of extrasolar planets provide a window onto the composition and thermal structure of the planetary atmospheres. For example, the photometric observations of secondary eclipses lead to the measurement of the planetary geometric albedo, Ag, which is an indicator of the presence of clouds in the atmosphere. Aims. In this work, we aim to measure the Ag in the optical domain of WASP-43b, a moderately irradiated giant planet with an equilibrium temperature of ~1400 K. Methods. For this purpose, we analyzed the secondary eclipse light curves collected by CHEOPS together with TESS along with observations of the system and the publicly available photometry obtained with HST WFC3/UVIS. We also analyzed the archival infrared observations of the eclipses and retrieve the thermal emission spectrum of the planet. By extrapolating the thermal spectrum to the optical bands, we corrected for the optical eclipses for thermal emission and derived the optical Ag. Results. The fit of the optical data leads to a marginal detection of the phase-curve signal, characterized by an amplitude of 160 ± 60 ppm and 80a-? 50+60 ppm in the CHEOPS and TESS passbands, respectively, with an eastward phase shift of ~50 (1.5Ï ? detection). The analysis of the infrared data suggests a non-inverted thermal profile and solar-like metallicity. The combination of the optical and infrared analyses allows us to derive an upper limit for the optical albedo of Ag< 0.087, with a confidence of 99.9%. Conclusions. Our analysis of the atmosphere of WASP-43b places this planet in the sample of irradiated hot Jupiters, with monotonic temperature-pressure profile and no indication of condensation of reflective clouds on the planetary dayside.

Subject headings and genre

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

  • Singh, V.Istituto nazionale di astrofisica (INAF) (author)
  • Kitzmann, D.Universität Bern,University of Bern (author)
  • Lendl, M.Université de Genève,University of Geneva (author)
  • Brandeker, AlexisStockholms universitet,Institutionen för astronomi(Swepub:su)alexis (author)
  • Bruno, G.Istituto nazionale di astrofisica (INAF) (author)
  • Bekkelien, A.Université de Genève,University of Geneva (author)
  • Benz, W.Universität Bern,University of Bern (author)
  • Gutermann, P.Laboratoire d'Astrophysique de Marseille (author)
  • Maxted, P.Keele University (author)
  • Bonfanti, A. (author)
  • Charnoz, S.Institut de Physique du Globe de Paris (author)
  • Fridlund, Malcolm,1952Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Heng, KevinThe University of Warwick,Universität Bern,University of Bern (author)
  • Hoyer, S.Laboratoire d'Astrophysique de Marseille (author)
  • Pagano, I.Istituto nazionale di astrofisica (INAF) (author)
  • Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64 (author)
  • Salmon, S.Université de Genève,University of Geneva (author)
  • Van Grootel, V. (author)
  • Wilson, T.G.University of St Andrews (author)
  • Asquier, J.European Space Research and Technology Centre (ESA ESTEC) (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)
  • Gambicorti, L.European Space Agency (ESA) (author)
  • Hasiba, J. (author)
  • Alibert, Y.Universität Bern,University of Bern (author)
  • Alonso, R.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (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, M.Université de Genève,University of Geneva (author)
  • Beck, T.Universität Bern,University of Bern (author)
  • Billot, N.Université de Genève,University of Geneva (author)
  • Bonfils, X. (author)
  • Broeg, C.Universität Bern,University of Bern (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Collier Cameron, A.University of St Andrews (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)
  • Delrez, L.Universite de Liège,University of Liège (author)
  • Demangeon, O.Universidade do Porto,University of Porto (author)
  • Demory, B.O.Universität Bern,University of Bern (author)
  • Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Fortier, A.Universität Bern,University of Bern (author)
  • Fossati, L. (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)
  • Isaak, K.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Kiss, L.Eötvös Loránd University (ELTE),Magyar Tudomanyos Akademia,Hungarian Academy of Sciences (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)
  • 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)
  • Palle, EnricInstituto de Astrofísica de Canarias (author)
  • Parviainen, H.Instituto de Astrofísica de Canarias (author)
  • Peter, G.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Piotto, Giampaolo P.Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF) (author)
  • Pollacco, Don L.The University of Warwick (author)
  • Queloz, D.University Of Cambridge,Eidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
  • Ragazzoni, RobertoIstituto nazionale di astrofisica (INAF),Università Degli Studi di Padova,University of Padua (author)
  • Rando, N.European Space Research and Technology Centre (ESA ESTEC) (author)
  • Rauer, H.Technische Universität Berlin,Freie Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Ribas, I.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)
  • Santos, N. C.Universidade do Porto,University of Porto (author)
  • Segransan, D.Université de Genève,University of Geneva (author)
  • Serrano, L. M.Universita degli Studi di Torino,University of Turin (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)
  • Ulmer, B.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Walton, N. A.University Of Cambridge,University of Cambridge (author)
  • Istituto nazionale di astrofisica (INAF)INAF-Osservatorio Astronomico di Roma (creator_code:org_t)

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  • In:Astronomy and Astrophysics: EDP Sciences6680004-63611432-0746

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