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  • Bordé, P.Université de Bordeaux,University of Bordeaux (author)

Transiting exoplanets from the CoRoT space mission: XXIX. The hot Jupiters CoRoT-30 b and CoRoT-31 b

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-03-25
  • EDP Sciences,2020
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:70e0996a-ba35-4b49-a2af-617a26528d9a
  • https://doi.org/10.1051/0004-6361/201732393DOI
  • https://research.chalmers.se/publication/516488URI

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 discovery as well as the orbital and physical characterizations of two new transiting giant exoplanets, CoRoT-30 b and CoRoT-31 b, with the CoRoT space telescope. Methods. We analyzed two complementary data sets: photometric transit light curves measured by CoRoT, and radial velocity curves measured by the HARPS spectrometer. To derive the absolute masses and radii of the planets, we modeled the stars from available magnitudes and spectra. Results. We find that CoRoT-30 b is a warm Jupiter on a close-to-circular 9.06-day orbit around a G3V star with a semi-major axis of about 0.08 AU. It has a radius of 1.01 ± 0.08 RJ, a mass of 2.90 ± 0.22 MJ, and therefore a mean density of 3.45 ± 0.65 g cm-3. The hot Jupiter CoRoT-31 b is on a close-to-circular 4.63-day orbit around a G2 IV star with a semi-major axis of about 0.05 AU. It has a radius of 1.46 ± 0.30 RJ, a mass of 0.84 ± 0.34 MJ, and therefore a mean density of 0.33 ± 0.18 g cm-3. Conclusions. Neither system seems to support the claim that stars hosting planets are more depleted in lithium. The radii of both planets are close to that of Jupiter, but they differ in mass; CoRoT-30 b is ten times denser than CoRoT-31 b. The core of CoRoT-30 b would weigh between 15 and 75 Earth masses, whereas relatively weak constraints favor no core for CoRoT-31 b. In terms of evolution, the characteristics of CoRoT-31 b appear to be compatible with the high-eccentricity migration scenario, which is not the case for CoRoT-30 b. The angular momentum of CoRoT-31 b is currently too low for the planet to evolve toward synchronization of its orbital revolution with stellar rotation, and the planet will slowly spiral-in while its host star becomes a red giant. CoRoT-30 b is not synchronized either: it looses angular momentum owing to stellar winds and is expected reach steady state in about 2 Gyr. CoRoT-30 and 31, as a pair, are a truly remarkable example of diversity in systems with hot Jupiters.

Subject headings and genre

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

  • Díaz, R. F.Université de Genève,University of Geneva,Universidad de Buenos Aires (author)
  • Creevey, O.Observatoire de la Cote d'Azur,Institut d'Astrophysique Spatiale (author)
  • Damiani, C.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Institut d'Astrophysique Spatiale (author)
  • Deeg, H.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna (author)
  • Klagyivik, P.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Wuchterl, G. (author)
  • Gandolfi, D.Universita degli Studi di Torino,University of Turin (author)
  • Fridlund, Malcolm,1952Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universiteit Leiden (UL),Leiden University (UL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri (author)
  • Bouchy, F.Laboratoire d'Astrophysique de Marseille,Université de Genève,University of Geneva (author)
  • Aigrain, S.University Of Oxford (author)
  • Alonso, R.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias (author)
  • Almenara, J. M.Laboratoire d'Astrophysique de Marseille,Université de Genève,University of Geneva (author)
  • Baglin, A.LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (author)
  • Barros, S.C.C.Laboratoire d'Astrophysique de Marseille,Universidade do Porto,University of Porto (author)
  • Bonomo, A. S.Istituto nazionale di astrofisica (INAF) (author)
  • Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Deleuil, M.Laboratoire d'Astrophysique de Marseille (author)
  • Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Ferraz-Mello, S.Universidade de Sao Paulo (USP),University of Sao Paulo (USP) (author)
  • Guenther, E. W.Thüringer Landessternwarte Tautenburg (author)
  • Guillot, T.Observatoire de la Cote d'Azur (author)
  • Grziwa, S.Universität zu Köln,University of Cologne (author)
  • Hatzes, A.Thüringer Landessternwarte Tautenburg (author)
  • Hebrard, G.Institut d 'Astrophysique de Paris (author)
  • Mazeh, T.Tel Aviv University (author)
  • Ollivier, M.LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique,Institut d'Astrophysique Spatiale (author)
  • Parviainen, H.University Of Oxford (author)
  • Pätzold, MartinUniversität zu Köln,University of Cologne (author)
  • Rauer, H.Technische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR) (author)
  • Rouan, D.LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (author)
  • Santerne, A.Laboratoire d'Astrophysique de Marseille (author)
  • Schneider, J.LUTH - Laboratoire de l'Univers et de ses Theories (author)
  • Université de BordeauxUniversité de Genève (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences6350004-63611432-0746

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