Transiting exoplanets from the CoRoT space mission^*

VII. The “hot-Jupiter”-type planet CoRoT-5b

¹ Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany e-mail: heike.rauer@dlr.de
² Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany
³ Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
⁴ Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France
⁵ School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK
⁶ Instituto de Astrofýsica de Canarias, 38205 La Laguna, Tenerife, Spain
⁷ LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France
⁸ Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France
⁹ Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France
¹⁰ Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
¹¹ Rheinisches Institut für Umweltforschung an der Universität zu Köln, Abt. Planetenforschung, Aachener Str. 209, 50931 Köln, Germany
¹² Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands
¹³ Observatorio Nacional, Rio de Janeiro, RJ, Brazil
¹⁴ Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria
¹⁵ Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
¹⁶ Institut d'Astrophysique et de Géophysique, Université de Liège, Allée du 6 août 17, Sart Tilman, Liège 1, Belgium
¹⁷ Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France
¹⁸ Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria
¹⁹ School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
²⁰ LUTH, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France

Received: 20 February 2009
Accepted: 23 July 2009

Abstract

Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected quickly in the “alarm-mode” in parallel to the ongoing target field monitoring. CoRoT's first planets have been detected in this mode.

Methods. The CoRoT raw lightcurves are filtered for orbital residuals, outliers, and low-frequency stellar signals. The phase folded lightcurve is used to fit the transit signal and derive the main planetary parameters. Radial velocity follow-up observations were initiated to secure the detection and to derive the planet mass.

Results. We report the detection of CoRoT-5b, detected during observations of the LRa01 field, the first long-duration field in the galactic anti-center direction. CoRoT-5b is a “hot Jupiter-type” planet with a radius of R_Jup, a mass of M_Jup, and therefore, a mean density of  . The planet orbits an F9V star of 14.0 mag in  days at an orbital distance of AU.