Brown dwarf companion with a period of 4.6 yr interacting with the hot Jupiter CoRoT-20 b - Aix-Marseille Université Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2018

Brown dwarf companion with a period of 4.6 yr interacting with the hot Jupiter CoRoT-20 b

F. Bouchy
  • Function : Author
M. Stalport
  • Function : Author
M. Deleuil
J.~m. Almenara
  • Function : Author
R. Alonso
  • Function : Author
S.~c.~c. Barros
  • Function : Author
A.~s. Bonomo
  • Function : Author
G. Cazalet
  • Function : Author
J.~b. Delisle
  • Function : Author
R.~f. Díaz
  • Function : Author
E.~w. Guenther
  • Function : Author
T. Guillot
G. Montagnier
  • Function : Author
C. Moutou

Abstract

We report the discovery of an additional substellar companion in the CoRoT-20 system based on six years of HARPS and SOPHIE radial velocity follow-up. CoRoT-20 c has a minimum mass of 17 +/- 1 M-Jup and orbits the host star in 4.59 +/- 0.05 yr, with an orbital eccentricity of 0.60 +/- 0.03. This is the first identified system with an eccentric hot Jupiter and an eccentric massive companion. The discovery of the latter might be an indication of the migration mechanism of the hot Jupiter, via the Lidov-Kozai effect. We explore the parameter space to determine which configurations would trigger this type of interactions.

Dates and versions

hal-02057660 , version 1 (05-03-2019)

Identifiers

Cite

J. Rey, F. Bouchy, M. Stalport, M. Deleuil, G. Hébrard, et al.. Brown dwarf companion with a period of 4.6 yr interacting with the hot Jupiter CoRoT-20 b. Astronomy and Astrophysics - A&A, 2018, 619, pp.A115. ⟨10.1051/0004-6361/201833180⟩. ⟨hal-02057660⟩
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