Transiting exoplanets from the CoRoT space mission: II. CoRoT-Exo-2b: A transiting planet around an active G star

被引：0

作者：

Alonso, R. ^{[1
]}

Auvergne, M. ^{[2
]}

Baglin, A. ^{[2
]}

Ollivier, M. ^{[3
]}

Moutou, C. ^{[1
]}

Rouan, D. ^{[2
]}

Deeg, H.J. ^{[4
]}

Aigrain, S. ^{[5
]}

Almenara, J.M. ^{[4
]}

Barbieri, M. ^{[1
]}

Barge, P. ^{[1
]}

Benz, W. ^{[6
]}

Bordé, P. ^{[3
]}

Bouchy, F. ^{[7
]}

De La Reza, R. ^{[8
]}

Deleuil, M. ^{[1
]}

Dvorak, R. ^{[9
]}

Erikson, A. ^{[10
]}

Fridlund, M. ^{[11
]}

Gillon, M. ^{[12
]}

Gondoin, P. ^{[11
]}

Guillot, T. ^{[13
]}

Hatzes, A. ^{[14
]}

Hébrard, G. ^{[7
]}

Kabath, P. ^{[10
]}

Jorda, L. ^{[1
]}

Lammer, H. ^{[15
]}

Léger, A. ^{[3
]}

Llebaria, A. ^{[1
]}

Loeillet, B. ^{[1
,7
]}

Magain, P. ^{[16
]}

Mayor, M. ^{[12
]}

Mazeh, T. ^{[17
]}

Pätzold, M. ^{[18
]}

Pepe, F. ^{[12
]}

Pont, F. ^{[12
]}

Queloz, D. ^{[12
]}

Rauer, H. ^{[10
,19
]}

Shporer, A. ^{[17
]}

Schneider, J. ^{[20
]}

Stecklum, B. ^{[14
]}

Udry, S. ^{[12
]}

Wuchterl, G. ^{[14
]}

机构：

[1] Laboratoire d'Astrophysique de Marseille, UMR 6110, Université de Provence, Traverse du Siphon, 13376 Marseille, France

[2] LESIA, CNRS UMR 8109, Observatoire de Paris, 5 place J. Janssen, 92195 Meudon, France

[3] IAS, Université Paris XI, 91405 Orsay, France

[4] Instituto de Astrofísica de Canarias, 38205 La Laguna, Spain

[5] School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom

[6] Physikalisches Institut, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland

[7] Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre and Marie Curie, 98bis Bd Arago, 75014 Paris, France

[8] Observatório Nacional, Rio de Janeiro, RJ, Brazil

[9] Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17, 1180 Vienna, Austria

[10] Institute of Planetary Research, DLR, Rutherfordstr. 2, 12489 Berlin, Germany

[11] Research and Scientific Support Department, European Space Agency, ESTEC, 2200 Noordwijk, Netherlands

[12] Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland

[13] Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, BP 4229, 06304 Nice Cedex 4, France

[14] Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany

[15] Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria

[16] Institut d'Astrophysique et de Géophysique, Université de Liège, Allée du 6 août 17, Sart Tilman, Liège 1, Belgium

[17] School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel

[18] Rheinisches Institut für Umweltforschung, Universität zu Köln, Abt. Planetenforschung, Aachener Str. 209, 50931 Köln, Germany

[19] Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

[20] LUTH, Observatoire de Paris-Meudon, 5 place J. Janssen, 92195 Meudon, France

来源：

Astronomy and Astrophysics | 2008年 / 482卷 / 03期

关键词：

Context. The CoRoT mission; a pioneer in exoplanet searches from space; has completed its first 150 days of continuous observations of ∼12 000 stars in the galactic plane. An analysis of the raw data identifies the most promising candidates and triggers the ground-based follow-up.Aims. We report on the discovery of the transiting planet CoRoT-Exo-2b; with a period of 1.743 days; and characterize its main parameters.Methods. We filter the CoRoT raw light curve of cosmic impacts; orbital residuals; and low frequency signals from the star. The folded light curve of 78 transits is fitted to a model to obtain the main parameters. Radial velocity data obtained with the SOPHIE; CORALIE and HARPS spectrographs are combined to characterize the system. The 2.5 min binned phase-folded light curve is affected by the effect of sucessive occultations of stellar active regions by the planet; and the dispersion in the out of transit part reaches a level of 1.0910 in flux units.Results. We derive a radius for the planet of 1.465 0.029 and a mass of 3.31 0.16; corresponding to a density of 1.31 0.04 g/cm. The large radius of CoRoT-Exo-2b cannot be explained by current models of evolution of irradiated planets.. © 2008 ESO;

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摘要：

Journal article (JA)

引用

共 40 条

[1] Transiting exoplanets from the CoRoT space mission: III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS
Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre and Marie Curie, 98bis Bd Arago, 75014 Paris, France
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Astron. Astrophys., 2008, 3 (L25-L28):
[2] Transiting exoplanets from the CoRoT space mission -: IV.: CoRoT-Exo-4b:: a transiting planet in a 9.2 day synchronous orbit
Aigrain, S.
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Schneider, J.
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ASTRONOMY & ASTROPHYSICS, 2008, 488 (02): : L43 - U15
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Astronomy and Astrophysics, 2008, 488 (02):
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ASTRONOMY & ASTROPHYSICS, 2008, 482 (03) : L17 - U6
[5] Transiting exoplanets from the CoRoT space mission
Almenara, J. M.
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ASTRONOMY & ASTROPHYSICS, 2013, 555
[6] Transiting exoplanets from the CoRoT space mission
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ASTRONOMY & ASTROPHYSICS, 2014, 567
[7] Relative photometry of transiting exoplanet COROT-Exo-2b
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CONTRIBUTIONS OF THE ASTRONOMICAL OBSERVATORY SKALNATE PLESO, 2009, 39 (01): : 34 - 42
[8] Transiting exoplanets from the CoRoT space mission -: V.: CoRoT-Exo-4b:: stellar and planetary parameters
Moutou, C.
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ASTRONOMY & ASTROPHYSICS, 2008, 488 (02) : L47 - U20
[9] Transiting exoplanets from the CoRoT space mission: I. CoRoT-Exo-1b: A low-density short-period planet around a G0V star
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1600, EDP Sciences, 17 Avenue du Hoggar - BP 112, Les Ulis Cedex A, F-91944, France (482):
[10] Transiting exoplanets from the CoRoT space mission XXVII. CoRoT-28b, a planet orbiting an evolved star, and CoRoT-29b, a planet showing an asymmetric transit
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