[en] CoRoT-21, a F8IV star of magnitude V = 16 mag, was observed by the space telescope CoRoT during the Long Run 01 (LRa01) in the first winter field (constellation Monoceros) from October 2007 to March 2008. Transits were discovered during the light curve processing. Radial velocity follow-up observations, however, were performed mainly by the 10-m Keck telescope in January 2010. The companion CoRoT-21b is a Jupiter-like planet of 2.26 ± 0.33 Jupiter masses and 1.30 ± 0.14 Jupiter radii in an circular orbit of semi-major axis 0.0417 ± 0.0011 AU and an orbital period of 2.72474 ± 0.00014 days. The planetary bulk density is (1.36 ± 0.48) × 10[SUP]3[/SUP] kg m[SUP]-3[/SUP], very similar to the bulk density of Jupiter, and follows an M[SUP]1/3[/SUP] - R relation like Jupiter. The F8IV star is a sub-giant star of 1.29 ± 0.09 solar masses and 1.95 ± 0.2 solar radii. The star and the planet exchange extremetidal forces that will lead to orbital decay and extreme spin-up of the stellar rotation within 800 Myr if the stellar dissipation is Q[SUB]∗[/SUB]/k[SUB]2∗[/SUB] ≤ 10[SUP]7[/SUP]. The CoRoT space mission, launched on December 27th 2006, has been developed and is operated by CNES, with the contribution of Austria, Belgium, Brazil, ESA (RSSD and Science Programme), Germany and Spain.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Pätzold, M.; Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany
Endl, M.; McDonald Observatory, The University of Texas at Austin, Austin, Texas, 78712, USA
Csizmadia, Sz; Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany
Gandolfi, D.; Research and Scientific Support Department, ESTEC/ESA, PO Box 299, 2200 AG, Noordwijk, The Netherlands
Jorda, L.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Grziwa, S.; Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany
Carone, L.; Rheinisches Institut für Umweltforschung an der Universität zu Köln, Aachener Strasse 209, 50931, Köln, Germany
Pasternacki, T.; Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany
Aigrain, S.; Department of Physics, Denys Wilkinson Building Keble Road, Oxford, OX1 3RH, UK
Almenara, J. M.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Alonso, R.; Observatoire de la Côte d Azur, Laboratoire Cassiopée, BP 4229, 06304, Nice Cedex 4, France
Auvergne, M.; LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place Jules Janssen, 92195, Meudon Cedex, France
Baglin, A.; LESIA, UMR 8109 CNRS, Observatoire de Paris, UVSQ, Université Paris-Diderot, 5 place Jules Janssen, 92195, Meudon Cedex, France
Barge, P.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Bonomo, A. S.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Cochran, W. B.; McDonald Observatory, The University of Texas at Austin, Austin, Texas, 78712, USA
Deleuil, M.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Deeg, H. J.; Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain ; Universidad de La Laguna, Dept. de Astrofísica, 38200 La Laguna, Tenerife, Spain
Díaz, R.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Dvorak, R.; University of Vienna, Institute of Astronomy, Türkenschanzstr. 17, 1180, Vienna, Austria
Erikson, A.; Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany
Ferraz-Mello, S.; IAG, Universidade de Sao Paulo, Brazil
Fridlund, M.; Research and Scientific Support Department, ESTEC/ESA, PO Box 299, 2200 AG, Noordwijk, The Netherlands
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Guillot, T.; Observatoire de la Côte d Azur, Laboratoire Cassiopée, BP 4229, 06304, Nice Cedex 4, France
Llebaria, A.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Lammer, H.; Space Research Institute, Austrian Academy of Science, Schmiedlstr. 6, 8042, Graz, Austria
MacQueen, P. J.; McDonald Observatory, The University of Texas at Austin, Austin, Texas, 78712, USA
Mazeh, T.; School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
Moutou, C.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Ofir, A.; School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, 69978, Tel Aviv, Israel ; Georg-August-Universität, Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany
Ollivier, M.; Institut d'Astrophysique Spatiale, Université Paris-Sud 11, CNRS (UMR 8617), Bât. 121, 91405, Orsay, France
Parviainen, H.; Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain ; Universidad de La Laguna, Dept. de Astrofísica, 38200 La Laguna, Tenerife, Spain
Queloz, D.; Observatoire de la Côte d Azur, Laboratoire Cassiopée, BP 4229, 06304, Nice Cedex 4, France
Rauer, H.; Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, 12489, Berlin, Germany ; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623, Berlin, Germany
Rouan, D.; Department of Physics, Denys Wilkinson Building Keble Road, Oxford, OX1 3RH, UK
Santerne, A.; Laboratoire d'Astrophysique de Marseille, 38 rue Frédéric Joliot-Curie, 13388, Marseille Cedex 13, France
Schneider, J.; LUTH, Observatoire de Paris, CNRS, Université Paris Diderot, 5 place Jules Janssen, 92195, Meudon, France
Tingley, B.; Instituto de Astrofisica de Canarias, 38205 La Laguna, Tenerife, Spain ; Universidad de La Laguna, Dept. de Astrofísica, 38200 La Laguna, Tenerife, Spain
Weingrill, J.; Space Research Institute, Austrian Academy of Science, Schmiedlstr. 6, 8042, Graz, Austria
