Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: the first secure inhabitant of the brown-dwarf desert

被引：178

作者：

Deleuil, M.

Deeg, H. J.

Alonso, R.

Bouchy, F.

Rouan, D.

Auvergne, M.

Baglin, A.

Aigrain, S.

Almenara, J. M.

Barbieri, M.

Barge, P.

Bruntt, H.

Borde, P.

Cameron, A. Collier

Csizmadia, Sz.

De la Reza, R.

Dvorak, R.

Erikson, A.

Fridlund, M.

Gandolfi, D.

Gillon, M.

Guenther, E.

Guillot, T.

Hatzes, A.

Hebrard, G.

Jorda, L.

Lammer, H.

Leger, A.

Llebaria, A.

Loeillet, B.

Mayor, M.

Mazeh, T.

Moutou, C.

Ollivier, M.

Paetzold, M.

Pont, F.

Queloz, D.

Rauer, H.

Schneider, J.

Shporer, A.

Wuchterl, G.

Zucker, S.

机构：

[1] Laboratoire d'Astrophysique de Marseille (UMR 6110), Technopole de Marseille-Étoile

[2] Instituto de Astrofísica de Canarias, 38200 La Laguna, C. via Lactea S/N

[3] Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre and Marie Curie, 75014 Paris

[4] LESIA, CNRS UMR 8109, Observatoire de Paris, 92195 Meudon

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

[6] School of Physics A28, University of Sydney

[7] IAS, Université Paris XI

[8] School of Physics and Astronomy, University of St Andrews

[9] Institute of Planetary Research, DLR, 12489 Berlin

[10] Observatório Nacional, Rio de Janeiro, RJ

[11] Institute for Astronomy, University of Vienna, 1180 Vienna

[12] Research and Scientific Support Department, European Space Agency, ESTEC

[13] Thüringer Landessternwarte Tautenburg, 07778 Tautenburg

[14] Observatoire de Genève, Université de Genève, 1290 Sauverny

[15] Observatoire de la Côte d'Azur, Laboratoire Cassiopée, CNRS UMR 6202, 06304 Nice Cedex 4

[16] Space Research Institute, Austrian Academy of Sciences, 8042 Graz

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

[18] Rheinisches Institut für Umweltforschung, Universität zu Köln, Abt. Planetenforschung, 50931 Köln

[19] Center for Astronomy and Astrophysics, TU Berlin, 10623 Berlin

[20] LUTH, Observatoire de Paris-Meudon, 92195 Meudon

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 491卷 / 03期

基金：

英国科学技术设施理事会;

关键词：

stars: planetary systems; stars:; low-mass; brown-dwarfs; Sun: fundamental parameters;

D O I：

10.1051/0004-6361:200810625

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The CoRoT space mission routinely provides high-precision photometric measurements of thousands of stars that have been continuously observed for months. Aims. The discovery and characterization of the first very massive transiting planetary companion with a short orbital period is reported. Methods. A series of 34 transits was detected in the CoRoT light curve of an F3V star, observed from May to October 2007 for 152 days. The radius was accurately determined and the mass derived for this new transiting, thanks to the combined analysis of the light curve and complementary ground-based observations: high-precision radial-velocity measurements, on-off photometry, and high signal-to-noise spectroscopic observations. Results. CoRoT-Exo-3b has a radius of 1.01 +/- 0.07 R(Jup) and transits around its F3-type primary every 4.26 days in a synchronous orbit. Its mass of 21.66 +/- 1.0 M(Jup), density of 26.4 +/- 5.6 g cm(-3), and surface gravity of log g = 4.72 clearly distinguish it from the regular close-in planet population, making it the most intriguing transiting substellar object discovered so far. Conclusions. With the current data, the nature of CoRoT-Exo-3b is ambiguous, as it could either be a low-mass brown-dwarf or a member of a new class of "superplanets". Its discovery may help constrain the evolution of close-in planets and brown-dwarfs better. Finally, CoRoT-Exo-3b confirms the trend that massive transiting giant planets (M >= 4 M(Jup)) are found preferentially around more massive stars than the Sun.

引用

页码：889 / 897

页数：9

共 47 条

[1] Transiting exoplanets from the CoRoT space mission -: IV.: CoRoT-Exo-4b:: a transiting planet in a 9.2 day synchronous orbit [J].

Aigrain, S. ;

Cameron, A. Collier ;

Ollivier, M. ;

Pont, F. ;

Jorda, L. ;

Almenara, J. M. ;

Alonso, R. ;

Barge, P. ;

Borde, P. ;

Bouchy, F. ;

Deeg, H. ;

De la Reza, R. ;

Deleuil, M. ;

Dvorak, R. ;

Erikson, A. ;

Fridlund, M. ;

Gondoin, P. ;

Gillon, M. ;

Guillot, T. ;

Hatzes, A. ;

Lammer, H. ;

Lanza, A. F. ;

Leger, A. ;

Llebaria, A. ;

Magain, P. ;

Mazeh, T. ;

Moutou, C. ;

Paetzold, M. ;

Pinte, C. ;

Queloz, D. ;

Rauer, H. ;

Rouan, D. ;

Schneider, J. ;

Wuchter, G. ;

Zucker, S. .

ASTRONOMY & ASTROPHYSICS, 2008, 488 (02) :L43-U15

[2] Models of giant planet formation with migration and disc evolution [J].

Alibert, Y ;

Mordasini, C ;

Benz, W ;

Winisdoerffer, C .

ASTRONOMY & ASTROPHYSICS, 2005, 434 (01) :343-353

[3]

Alonso R, 2008, ASTRON ASTROPHYS, V482, pL21, DOI 10.1051/0004-6361:200809431

[4]

[Anonymous], ESA SP

[5] HAT-P-5b:: a jupiter-like hot jupiter transiting a bright star [J].

Bakos, G. A. ;

Shporer, A. ;

Pal, A. ;

Torres, G. ;

Kovacs, Geza ;

Latham, D. W. ;

Mazeh, T. ;

Ofir, A. ;

Noyes, R. W. ;

Sasselov, D. D. ;

Bouchy, F. ;

Pont, F. ;

Queloz, D. ;

Udry, S. ;

Esquerdo, G. ;

Sipocz, B. ;

Kovacs, Gabor ;

Stefanik, R. ;

Lazar, J. ;

Papp, I. ;

Sari, P. .

ASTROPHYSICAL JOURNAL LETTERS, 2007, 671 (02) :L173-L176

[6] Structure and evolution of super-Earth to super-Jupiter exoplanets - I. Heavy element enrichment in the interior [J].

Baraffe, I. ;

Chabrier, G. ;

Barman, T. .

ASTRONOMY & ASTROPHYSICS, 2008, 482 (01) :315-332

[7] Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458 [J].

Baraffe, I ;

Chabrier, G ;

Barman, TS ;

Allard, F ;

Hauschildt, PH .

ASTRONOMY & ASTROPHYSICS, 2003, 402 (02) :701-712

[8] Transiting exoplanets from the CoRoT space mission [J].

Barge, P. ;

Baglin, A. ;

Auvergne, M. ;

Rauer, H. ;

Leger, A. ;

Schneider, J. ;

Pont, F. ;

Aigrain, S. ;

Almenara, J. -M. ;

Alonso, R. ;

Barbieri, M. ;

Borde, P. ;

Bouchy, F. ;

Deeg, H. J. ;

Deleuil, M. ;

Dvorak, R. ;

Erikson, A. ;

Fridlund, M. ;

Gillon, M. ;

Gondoin, P. ;

Guillot, T. ;

Hatzes, A. ;

Hebrard, G. ;

Jorda, L. ;

Kabath, P. ;

Lammer, H. ;

Llebaria, A. ;

Loeillet, B. ;

Magain, P. ;

Mazeh, T. ;

Moutou, C. ;

Ollivier, M. ;

Paetzold, M. ;

Queloz, D. ;

Rouan, D. ;

Shporer, A. ;

Wuchterl, G. .

ASTRONOMY & ASTROPHYSICS, 2008, 482 (03) :L17-U6

[9] Transiting exoplanets from the CoRoT space mission: III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS [J].

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

不详 ;

不详 .

Astron. Astrophys., 2008, 3 (L25-L28) :L25-L28

[10]

Bouchy F., 2006, 10 ANNIVERSARY 51 PE, V319

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