Transiting exoplanets from the CoRoT space mission. I. CoRoT-Exo-1b: a low-density short-period planet around a G0V star
English
Barge, P.[Laboratoire d'Astrophysique de Marseille, UMR6110, CNRS/Université de Provence, BP 8, 13376 Marseille Cedex 12, France]
Baglin, A.[LESIA, Observatoire de Paris-Meudon, 5 place Jules Janssen, 92195 Meudon, France]
Auvergne, M.[LESIA, Observatoire de Paris-Meudon, 5 place Jules Janssen, 92195 Meudon, France]
Rauer, H.[Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany ; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany]
Léger, A.[Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France]
Schneider, J.[LUTH, Observatoire de Paris-Meudon, 5 place Jules Janssen, 92195 Meudon, France]
Pont, F.[Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland]
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, Tenerife, Spain]
Alonso, R.[Laboratoire d'Astrophysique de Marseille, UMR6110, CNRS/Université de Provence, BP 8, 13376 Marseille Cedex 12, France]
Barbieri, M.[Laboratoire d'Astrophysique de Marseille, UMR6110, CNRS/Université de Provence, BP 8, 13376 Marseille Cedex 12, France]
Bordé, P.[Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France]
Bouchy, F.[Institut d'Astrophysique de Paris, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France]
Deeg, H. J.[Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain]
La Reza, De[Observatório Nacional, Rio de Janeiro, RJ, Brazil]
Deleuil, M.[Laboratoire d'Astrophysique de Marseille, UMR6110, CNRS/Université de Provence, BP 8, 13376 Marseille Cedex 12, France]
Dvorak, R.[University of Vienna, Institute of Astronomy, Türkenschanzstr. 17, 1180 Vienna, Austria]
[en] planetary systems ; techniques: photometry ; techniques: radial velocity
[en] Context: The pioneer space mission for photometric planet searches, CoRoT, steadily monitors about 12 000 stars in each of its fields of view. Transit candidates can be detected early in the processing of the data and before the end of a run of observation. Aims: We report the detection of the first planet discovered by CoRoT and characterizing it with the help of follow-up observations. Methods: Raw data were filtered from outliers and residuals at the orbital period of the satellite. The orbital parameters and the radius of the planet were estimated by best fitting the phase folded light curve with 34 successive transits. Doppler measurements with the SOPHIE spectrograph permitted us to secure the detection against binaries and to estimate the mass of the planet. Results: The accuracy of the data is very high with a dispersion in the 2.17 min binned phase-folded light curve that does not exceed ~3.×10[SUP]-4[/SUP] in flux unit. The planet orbits a mildly metal-poor G0V star of magnitude V=13.6 in 1.5 days. The estimated mass and radius of the star are 0.95±0.15 M[SUB]o[/SUB] and 1.11±0.05 R[SUB]o[/SUB]. We find the planet has a radius of 1.49±0.08 R_Jup, a mass of 1.03±0.12 M_Jup, and a particularly low mean density of 0.38±0.05 g cm[SUP]-3[/SUP]. The CoRoT space mission, launched on Dec. 27th, 2006, was developed and is operated by the CNES, with participation of the Science Program of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany and Spain. Based in part on observations with the SOPHIE spectrograph at Obs. de Haute Provence, France. Table [see full text] is only available in electronic form at http://www.aanda.org Individual photometric measurements are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/482/L17
[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
