Transiting exoplanets from the CoRoT space mission. XV. CoRoT-15b: a brown-dwarf transiting companion

F. Bouchy, M. Deleuil, T. Guillot, S. Aigrain, L. Carone, W. D. Cochran, J. M. Almenara, R. Alonso, M. Auvergne, A. Baglin, P. Barge, A. S. Bonomo, P. Bordé, Sz. Csizmadia, K. de Bondt, H. J. Deeg, R. F. Díaz, R. Dvorak, M. Endl, A. EriksonS. Ferraz-Mello, M. Fridlund, D. Gandolfi, J. C. Gazzano, N. Gibson, M. Gillon, E. Guenther, A. Hatzes, M. Havel, G. Hébrard, L. Jorda, A. Léger, C. Lovis, A. Llebaria, H. Lammer, P. J. MacQueen, T. Mazeh, C. Moutou, A. Ofir, M. Ollivier, H. Parviainen, M. Pätzold, D. Queloz, H. Rauer, D. Rouan, A. Santerne, J. Schneider, B. Tingley, G. Wuchterl

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

We report the discovery by the CoRoT space mission of a transiting brown dwarf orbiting a F7V star with an orbital period of 3.06 days. CoRoT-15bhas a radius of 1.12+0.30-0.15 {R}Jup and a mass of 63.3 ± 4.1 {M}Jup, and is thus the second transiting companion lying in the theoretical mass domain of brown dwarfs.CoRoT-15b is either very young or inflated compared to standard evolution models, a situation similar to that of M-dwarf stars orbiting close to solar-type stars. Spectroscopic constraints and an analysis of the light curve imply a spin period in the range 2.9-3.1 days for the central star, which is compatible with a double-synchronisation of the system.

Original languageEnglish
Article numberA68
Number of pages6
JournalAstronomy and Astrophysics
Volume525
Early online date02 Dec 2010
DOIs
Publication statusPublished - Jan 2011
Externally publishedYes

Keywords

  • brown dwarfs
  • stars: low-mass
  • planetary systems
  • techniques: photometric
  • techniques: radial velocities
  • techniques: spectroscopic

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