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Title:
Transiting exoplanets from the CoRoT space mission. V. CoRoT-Exo-4b: stellar and planetary parameters
Authors:
Moutou, C.; Bruntt, H.; Guillot, T.; Shporer, A.; Guenther, E.; Aigrain, S.; Almenara, J. M.; Alonso, R.; Auvergne, M.; Baglin, A.; Barbieri, M.; Barge, P.; Benz, W.; Bordé, P.; Bouchy, F.; Deeg, H. J.; de La Reza, R.; Deleuil, M.; Dvorak, R.; Erikson, A.; Fridlund, M.; Gillon, M.; Gondoin, P.; Hatzes, A.; Hébrard, G.; Jorda, L.; Kabath, P.; Lammer, H.; Léger, A.; Llebaria, A.; Loeillet, B.; Magain, P.; Mayor, M.; Mazeh, T.; Ollivier, M.; Pätzold, M.; Pepe, F.; Pont, F.; Queloz, D.; Rabus, M.; Rauer, H.; Rouan, D.; Schneider, J.; Udry, S.; Wuchterl, G.
Affiliation:
AA(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France ), AB(School of Physics A28, University of Sydney, Australia), AC(OCA, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France), AD(Wise Observatory, Tel Aviv University, Tel Aviv 69978, Israel), AE(Thüringer Landessternwarte, 07778 Tautenburg, Germany), AF(School of Physics, University of Exeter, Exeter EX4 4QL, UK), AG(Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain), AH(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), AI(LESIA, CNRS UMR 8109, Obs. de Paris, 92195 Meudon, France), AJ(LESIA, CNRS UMR 8109, Obs. de Paris, 92195 Meudon, France), AK(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), AL(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), AM(Physikalische Institut Univ. Bern, 3012 Bern, Switzerland), AN(IAS, Université Paris XI, 91405 Orsay, France), AO(IAP, CNRS, Univ. Pierre & Marie Curie, Paris, France), AP(Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain), AQ(Observatório Nacional, Rio de Janeiro, RJ, Brazil), AR(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), AS(Institute for Astronomy University of Vienna, 1180 Vienna, Austria), AT(Institute of Planetary Research, DLR, 12489 Berlin, Germany), AU(RSSD, ESA/ESTEC, 2200 Noordwijk, The Netherlands), AV(Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland), AW(RSSD, ESA/ESTEC, 2200 Noordwijk, The Netherlands), AX(Thüringer Landessternwarte, 07778 Tautenburg, Germany), AY(IAP, CNRS, Univ. Pierre & Marie Curie, Paris, France), AZ(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), BA(Institute of Planetary Research, DLR, 12489 Berlin, Germany), BB(IWF, Austrian Academy of Sciences, 8042 Graz, Austria), BC(IAS, Université Paris XI, 91405 Orsay, France), BD(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France), BE(LAM, UMR 6110, CNRS/Univ. de Provence, 38 rue F. Joliot-Curie, 13388 Marseille, France; IAP, CNRS, Univ. Pierre & Marie Curie, Paris, France), BF(IAG, Université de Liège, Allée du 6 août 17, Liège 1, Belgium), BG(Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland), BH(Wise Observatory, Tel Aviv University, Tel Aviv 69978, Israel), BI(IAS, Université Paris XI, 91405 Orsay, France), BJ(RIU, Universität zu Köln, 50931 Köln, Germany), BK(Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland), BL(School of Physics, University of Exeter, Exeter EX4 4QL, UK), BM(Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland), BN(Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain), BO(Institute of Planetary Research, DLR, 12489 Berlin, Germany; ZAA, Technical University Berlin, 10623 Berlin, Germany), BP(LESIA, CNRS UMR 8109, Obs. de Paris, 92195 Meudon, France), BQ(LUTH, Obs. de Paris, 5 place J. Janssen, 92195 Meudon, France), BR(Obs. de Genève, Univ. de Genève, 1290 Sauverny, Switzerland), BS(Thüringer Landessternwarte, 07778 Tautenburg, Germany)
Publication:
Astronomy and Astrophysics, Volume 488, Issue 2, 2008, pp.L47-L50 (A&A Homepage)
Publication Date:
09/2008
Origin:
EDP Sciences
Astronomy Keywords:
planetary systems, techniques: photometric, techniques: radial velocities, stars: fundamental parameters
DOI:
10.1051/0004-6361:200810273
Bibliographic Code:
2008A&A...488L..47M

Abstract

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&sun; and radius of 1.17 R&sun;. 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


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