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

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

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dc.contributor.author Alonso, R. en_GB
dc.contributor.author Auvergne, M. en_GB
dc.contributor.author Baglin, A. en_GB
dc.contributor.author Ollivier, M. en_GB
dc.contributor.author Moutou, C. en_GB
dc.contributor.author Rouan, D. en_GB
dc.contributor.author Deeg, H. J. en_GB
dc.contributor.author Aigrain, Suzanne en_GB
dc.contributor.author Almenara, J.-M. en_GB
dc.contributor.author Barbieri, M. en_GB
dc.contributor.author Barge, P. en_GB
dc.contributor.author Benz, W. en_GB
dc.contributor.author Bordé, P. en_GB
dc.contributor.author Bouchy, F. en_GB
dc.contributor.author De la Reza, R. en_GB
dc.contributor.author Deleuil, M. en_GB
dc.contributor.author Dvorak, R. en_GB
dc.contributor.author Erikson, A. en_GB
dc.contributor.author Fridlund, M. en_GB
dc.contributor.author Gillon, M. en_GB
dc.contributor.author Gondoin, P. en_GB
dc.contributor.author Guillot, T. en_GB
dc.contributor.author Hatzes, A. en_GB
dc.contributor.author Hébrard, G. en_GB
dc.contributor.author Kabath, P. en_GB
dc.contributor.author Jorda, L. en_GB
dc.contributor.author Lammer, H. en_GB
dc.contributor.author Léger, A. en_GB
dc.contributor.author Llebaria, A. en_GB
dc.contributor.author Loeillet, B. en_GB
dc.contributor.author Magain, P. en_GB
dc.contributor.author Mayor, M. en_GB
dc.contributor.author Mazeh, T. en_GB
dc.contributor.author Pätzold, M. en_GB
dc.contributor.author Pepe, F. en_GB
dc.contributor.author Pont, F. en_GB
dc.contributor.author Queloz, D. en_GB
dc.contributor.author Rauer, H. en_GB
dc.contributor.author Shporer, A. en_GB
dc.contributor.author Schneider, J. en_GB
dc.contributor.author Stecklum, B. en_GB
dc.contributor.author Udry, S. en_GB
dc.contributor.author Wuchterl, G. en_GB
dc.date.accessioned 2009-12-10T14:27:08Z en_GB
dc.date.accessioned 2011-01-25T11:54:43Z en_US
dc.date.accessioned 2013-03-20T13:24:46Z
dc.date.issued 2008 en_GB
dc.description.abstract 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 × 10−4 in flux units. Results. We derive a radius for the planet of 1.465 ± 0.029 RJup and a mass of 3.31 ± 0.16 MJup, corresponding to a density of 1.31 ± 0.04 g/cm3. The large radius of CoRoT-Exo-2b cannot be explained by current models of evolution of irradiated planets. en_GB
dc.identifier.citation 482 (3), pp. L21-L24 en_GB
dc.identifier.doi 10.1051/0004-6361:200809431 en_GB
dc.identifier.uri http://hdl.handle.net/10036/87759 en_GB
dc.language.iso en en_GB
dc.publisher EDP Sciences en_GB
dc.relation.url http://dx.doi.org/10.1051/0004-6361:200809431 en_GB
dc.subject planetary systems en_GB
dc.subject photometric techniques en_GB
dc.subject radial velocities techniques en_GB
dc.title Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star en_GB
dc.type Article en_GB
dc.date.available 2009-12-10T14:27:08Z en_GB
dc.date.available 2011-01-25T11:54:43Z en_US
dc.date.available 2013-03-20T13:24:46Z
dc.identifier.issn 0004-6361 en_GB
dc.identifier.issn 1432-0746 en_GB
dc.description Copyright © The European Southern Observatory (ESO) en_GB
dc.identifier.journal Astronomy and Astrophysics en_GB


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