Reference : Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting plane...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/27342
Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star
English
Alonso, R. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Auvergne, M. [LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France]
Baglin, A. [LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France]
Ollivier, M. [IAS, Université Paris XI, 91405 Orsay, France]
Moutou, C. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Rouan, D. [LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France]
Deeg, H. J. [Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain]
Aigrain, S. [School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK]
Almenara, J. M. [Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain]
Barbieri, M. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Barge, P. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Benz, W. [Physikalisches Institut, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland]
Bordé, P. [IAS, Université Paris XI, 91405 Orsay, France]
Bouchy, F. [Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France]
de La Reza, R. [Observatório Nacional, Rio de Janeiro, RJ, Brazil]
Deleuil, M. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Dvorak, R. [Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria]
Erikson, A. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany]
Fridlund, M. [Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Gondoin, P. [Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands]
Guillot, T. [Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France]
Hatzes, A. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Hébrard, G. [Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France]
Kabath, P. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany]
Jorda, L. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Lammer, H. [Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria]
Léger, A. [IAS, Université Paris XI, 91405 Orsay, France]
Llebaria, A. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Loeillet, B. [Laboratoire d'Astrophysique de Marseille, UMR 6110, CNRS/Université de Provence, Traverse du Siphon, 13376 Marseille, France]
Magain, Pierre mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Mayor, M. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Mazeh, T. [School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Pätzold, M. [Rheinisches Institut für Umweltforschung, Universität zu Köln, Abt. Planetenforschung, Aachener Str. 209, 50931 Köln, Germany]
Pepe, F. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Pont, F. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Queloz, D. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Rauer, H. [Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany ; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany]
Shporer, A. [School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel]
Schneider, J. [LUTH, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France]
Stecklum, B. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
Udry, S. [Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland]
Wuchterl, G. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany]
1-May-2008
Astronomy and Astrophysics
EDP Sciences
482
L21-L24
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] stars: planetary systems ; techniques: photometric ; techniques: radial velocity
[en] 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[SUP]-4[/SUP] in flux units. Results: We derive a radius for the planet of 1.465 ± 0.029 R_Jup and a mass of 3.31 ± 0.16 M_Jup, corresponding to a density of 1.31 ± 0.04 g/cm^3. The large radius of CoRoT-Exo-2b cannot be explained by current models of evolution of irradiated planets. Based on observations obtained with CoRoT, a space project operated by the French Space Agency, CNES, with participation of the Science Programme of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany and Spain; and on observations made with SOPHIE spectrograph at Observatoire de Haute Provence, France (PNP.07 A.MOUT), CORALIE, and HARPS spectrograph at ESO La Silla Observatroy (079.C-0127/F)). Table 2 is only available in electronic form at http://www.aanda.org
Researchers ; Professionals
http://hdl.handle.net/2268/27342
10.1051/0004-6361:200809431
http://adsabs.harvard.edu/abs/2008A%26A...482L..21A
The authors thank EDP Sciences for their deposit authorization

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