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Title:
Transiting exoplanets from the CoRoT space mission. III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS
Authors:
Bouchy, F.; Queloz, D.; Deleuil, M.; Loeillet, B.; Hatzes, A. P.; Aigrain, S.; Alonso, R.; Auvergne, M.; Baglin, A.; Barge, P.; Benz, W.; Bordé, P.; Deeg, H. J.; de La Reza, R.; Dvorak, R.; Erikson, A.; Fridlund, M.; Gondoin, P.; Guillot, T.; Hébrard, G.; Jorda, L.; Lammer, H.; Léger, A.; Llebaria, A.; Magain, P.; Mayor, M.; Moutou, C.; Ollivier, M.; Pätzold, M.; Pepe, F.; Pont, F.; Rauer, H.; Rouan, D.; Schneider, J.; Triaud, A. H. M. J.; Udry, S.; Wuchterl, G.
Affiliation:
AA(Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France), AB(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), AC(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AD(Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France; Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AE(Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany), AF(School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK), AG(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AH(LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon Cedex, France), AI(LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon Cedex, France), AJ(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AK(Physikalisches Institut Universität Bern, Sidlerstrasse 5, 3012 Bern, Switzerland), AL(Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France), AM(Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain), AN(Observatório Nacional, Rio de Janeiro, RJ, Brazil), AO(Institute for Astronomy, University of Vienna, Türkenschanzstr. 17, 1180 Vienna, Austria), AP(Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany), AQ(Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands), AR(Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, The Netherlands), AS(Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France), AT(Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre & Marie Curie, 98bis Bd Arago, 75014 Paris, France), AU(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AV(Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria), AW(Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France), AX(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), AY(Institut d'Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 17, Sart Tilman, Liège 1, Belgium), AZ(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), BA(Laboratoire d'Astrophysique de Marseille, CNRS UMR 6110, Traverse du Siphon, 13376 Marseille, France), BB(Institut d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay, France), BC(Institute for Geophysics and Meteorology, Köln University, Albertus-Magnus-Platz, 50923 Cologne, Germany), BD(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), BE(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), BF(Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany; Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany), BG(LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon Cedex, France), BH(LUTH, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon Cedex, France), BI(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), BJ(Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland), BK(Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany)
Publication:
Astronomy and Astrophysics, Volume 482, Issue 3, 2008, pp.L25-L28 (A&A Homepage)
Publication Date:
05/2008
Origin:
EDP Sciences
Astronomy Keywords:
planetary systems, techniques: radial velocities
DOI:
10.1051/0004-6361:200809433
Bibliographic Code:
2008A&A...482L..25B

Abstract

We report on the spectroscopic transit of the massive hot-Jupiter CoRoT-Exo-2b observed with the high-precision spectrographs SOPHIE and HARPS. By modeling the radial velocity anomaly occurring during the transit due to the Rossiter-McLaughlin (RM) effect, we determine the sky-projected angle between the stellar spin and the planetary orbital axis to be close to zero lambda = 7.2 ± 4.5 deg, and we secure the planetary nature of CoRoT-Exo-2b. We discuss the influence of the stellar activity on the RM modeling. Spectral analysis of the parent star from HARPS spectra are presented.

Observations made with SOPHIE spectrograph at Observatoire de Haute Provence, France (PNP.07A.MOUT) and HARPS spectrograph at ESO La Silla Observatory (079.C-0127(F)). The CoRoT space mission, launched on December 27th 2006, has been developed and is operated by CNES, with the contribution of Austria, Belgium, Brasil, ESA, Germany, and Spain.


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