Hébrard, G.[IAP, CNRS, Univ. Pierre & Marie Curie, Paris, France]
Jorda, L.[LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France]
Kabath, P.[Institute of Planetary Research, DLR, 12489 Berlin, Germany]
Lammer, H.[IWF, Austrian Academy of Sciences, 8042 Graz, Austria]
Léger, A.[IAS, Université Paris XI, 91405 Orsay, France]
Llebaria, A.[LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France]
Loeillet, B.[LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France; IAP, CNRS, Univ. Pierre & Marie Curie, Paris, France]
Magain, Pierre[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Mayor, M.[Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland]
Mazeh, T.[Wise Observatory, Tel Aviv University, Tel Aviv 69978, Israel]
Ollivier, M.[IAS, Université Paris XI, 91405 Orsay, France]
Pätzold, M.[RIU, Universität zu Köln, 50931 Köln, Germany]
Pepe, F.[Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland]
Pont, F.[School of Physics, Univ. of Exeter, Exeter EX4 4QL, UK]
Queloz, D.[Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland]
Rabus, M.[Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain]
Rauer, H.[Institute of Planetary Research, DLR, 12489 Berlin, Germany ; ZAA, Technical University Berlin, 10623 Berlin, Germany]
Rouan, D.[LESIA, CNRS UMR 8109, Obs. de Paris, 92195 Meudon, France]
Schneider, J.[LUTH, Obs. de Paris, 5 place J. Janssen, 92195 Meudon, France]
Udry, S.[Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland]
[en] planetary systems ; techniques: photometric ; techniques: radial velocities ; stars: fundamental parameters
[en] Aims. The CoRoT satellite has announced its fourth transiting planet (Aigrain et al. 2008, A&A, 488, L43) with space photometry. We describe and analyse complementary observations of this system performed to establish the planetary nature of the transiting body and to estimate the fundamental parameters of the planet and its parent star. Methods: We have analysed high precision radial-velocity data, ground-based photometry, and high signal-to-noise ratio spectroscopy. Results: The parent star CoRoT-Exo-4 (2MASS 06484671-0040219) is a late F-type star of mass of 1.16 M[SUB]o[/SUB] and radius of 1.17 R[SUB]o[/SUB]. The planet has a circular orbit with a period of 9.20205 d. The planet radius is 1.19 R_Jup and the mass is 0.72 M_Jup. It is a gas-giant planet with a ``normal'' internal structure of mainly H and He. CoRoT-Exo-4b has the second longest period of the known transiting planets. It is an important discovery since it occupies an empty area in the mass-period diagram of transiting exoplanets. 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 the SOPHIE spectrograph at Observatoire de Haute Provence, France (PNP.07B.MOUT), and the HARPS spectrograph at ESO La Silla Observatory (079.C-0127/F). Table 2 and Fig. 5 are only available in electronic form at http://www.aanda.org
[Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
