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

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-15b has a radius of 1.12+0.30-0.15 RJup and a mass of 63.3 ± 4.1 MJup, 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-typestars. Spectroscopic constraints and an analysis of the lightcurve 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
JournalAstronomy and Astrophysics
Volume525
Issue number19
StatePublished - Jan 2011

Keywords

  • Brown dwarfs
  • Planetary systems
  • Stars: low-mass
  • Techniques: photometric
  • Techniques: radial velocities
  • Techniques: spectroscopic

Fingerprint

Dive into the research topics of 'Transiting exoplanets from the CoRoT space mission: XV. CoRoT-15b: A brown-dwarf transiting companion'. Together they form a unique fingerprint.

Cite this