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Transiting exoplanets from the CoRoT space mission: II. CoRoT-Exo-2b: A transiting planet around an active G star

Alonso, R. and Auvergne, M. and Baglin, A. and Ollivier, M. and Moutou, C. and Rouan, D. and Deeg, H. J. and Aigrain, S. and Almenara, J. M. and Barbieri, M. and Barge, P. and Benz, W. and Bordé, P. and Bouchy, F. and De la Reza, R. and Deleuil, M. and Dvorak, R. and Erikson, Anders and Fridlund, M. and Gillon, M. and Gondoin, P. and Guillot, T. and Hatzes, A. and Hébrard, G. and Kabath, Petr and Jorda, L. and Lammer, H. and Léger, A. and Llebaria, A. and Loeillet, B. and Magain, P. and Mayor, M. and Mazeh, T. and Pätzold, M. and Pepe, F. and Pont, F. and Queloz, D. and Rauer, Heike and Shporer, A. and Schneider, J. and Stecklum, B. and Udry, S. and Wuchterl, G. (2008) Transiting exoplanets from the CoRoT space mission: II. CoRoT-Exo-2b: A transiting planet around an active G star. Astronomy and Astrophysics, 482 (3), L21-L24. EDP Sciences. doi: 10.1051/0004-6361:200809431. ISSN 0004-6361.

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Context. The CoRoT mission, a pioneer in exoplanet searches from space, has completed its first 150 days of continuous observations of ~12 000 stars in the galactic plane. An analysis of the raw data identifies the most promising candidates and triggers the ground-based follow-up. Aims. We report on the discovery of the transiting planet CoRoT-Exo-2b, with a period of 1.743 days, and characterize its main parameters. Methods. We filter the CoRoT raw light curve of cosmic impacts, orbital residuals, and low frequency signals from the star. The folded light curve of 78 transits is fitted to a model to obtain the main parameters. Radial velocity data obtained with the SOPHIE, CORALIE and HARPS spectrographs are combined to characterize the system. The 2.5 min binned phase-folded light curve is affected by the effect of sucessive occultations of stellar active regions by the planet, and the dispersion in the out of transit part reaches a level of 1.09 x 10<sup>-4</sup> in flux units. Results. We derive a radius for the planet of 1.465 plusminus 0.029 R<sub>Jup</sub> and a mass of 3.31 plusminus 0.16 M<sub>Jup</sub>, corresponding to a density of 1.31 plusminus 0.04 g/cm<sup>3</sup>. The large radius of CoRoT-Exo-2b cannot be explained by current models of evolution of irradiated planets.10-4 in flux units.

Item URL in elib:https://elib.dlr.de/53809/
Document Type:Article
Title:Transiting exoplanets from the CoRoT space mission: II. CoRoT-Exo-2b: A transiting planet around an active G star
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Alonso, R.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Ollivier, M.IAS Université de ParisUNSPECIFIED
Moutou, C.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Deeg, H. J.Instituto de Astrofisica de CanariasUNSPECIFIED
Aigrain, S.School of Physics University of ExeterUNSPECIFIED
Almenara, J. M.Instituto de Astrofisica de CanariasUNSPECIFIED
Barbieri, M.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Barge, P.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Benz, W.Physikalisches Institu University of BernUNSPECIFIED
Bordé, P.IAS Université de ParisUNSPECIFIED
Bouchy, F.Institut d'Astrophysique de ParisUNSPECIFIED
De la Reza, R.Observatoiro Nacional Rio de JaneiroUNSPECIFIED
Deleuil, M.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Dvorak, R.Institute for Astronomy University of ViennaUNSPECIFIED
Gillon, M.Observatoire de GenèveUNSPECIFIED
Guillot, T.Observatoire de la Côte d'AzurUNSPECIFIED
Hatzes, A.Thüringer Landessternwarte TautenburgUNSPECIFIED
Jorda, L.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Lammer, H.Space Research Institute Austrian Academy of SciencesUNSPECIFIED
Léger, A.IAS Université de ParisUNSPECIFIED
Llebaria, A.Laboratoire d'Astrophysique de MarseilleUNSPECIFIED
Loeillet, B.Laboratoire d'Astrophysique de Marseille and Institut d'Astrophysique de ParisUNSPECIFIED
Magain, P.Institut d'astrophysique et de Géophysique Université de LiègeUNSPECIFIED
Mayor, M.Observatoire de GenèveUNSPECIFIED
Mazeh, T.School of Physics and Astronomy Tel Aviv universityUNSPECIFIED
Pätzold, M.Rheinishces Institut für Umweltforschung Universität zu KölnUNSPECIFIED
Pepe, F.Observatoire de GenèveUNSPECIFIED
Pont, F.Observatoire de GenèveUNSPECIFIED
Queloz, D.Observatoire de GenèveUNSPECIFIED
Shporer, A.School of Physics and Astronomy Tel Aviv universityUNSPECIFIED
Schneider, J.LUTH Observatoire de Paris-MeudonUNSPECIFIED
Stecklum, B.Thüringer Landessternwarte TautenburgUNSPECIFIED
Udry, S.Observatoire de GenèveUNSPECIFIED
Wuchterl, G.Thüringer Landessternwarte TautenburgUNSPECIFIED
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:L21-L24
EditorsEmailEditor's ORCID iD
Publisher:EDP Sciences
Keywords:CoRot, Exo-2b, transit method, photometry, exoplanets
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Extrasolare Planeten (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Paris, Philip
Deposited On:29 Apr 2008
Last Modified:27 Apr 2009 14:53

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