Brown dwarf companion with a period of 4.6 yr interacting with the hot Jupiter CoRoT-20b
Journal article, 2018
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 MJup 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.
Planetary systems
Brown dwarfs
Stars: Low-mass
Planets and satellites: Dynamical evolution and stability
Techniques: Radial velocities
Stars: Individual: CoRoT-20
Author
J. Rey
University of Geneva
F. Bouchy
University of Geneva
M. Stalport
University of Geneva
M. Deleuil
Laboratoire d'Astrophysique de Marseille
G. Hebrard
Institut d 'Astrophysique de Paris
Observatoire de Haute-Provence
J. M. Almenara
University of Geneva
R. Alonso
Instituto de Astrofísica de Canarias
University of La Laguna
S.C.C. Barros
University of Porto
A. S. Bonomo
Istituto nazionale di astrofisica (INAF)
G. Cazalet
Laboratoire d'Astrophysique de Marseille
J. B. Delisle
University of Geneva
R. F. Diaz
Universidad de Buenos Aires
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Leiden University
E. W. Guenther
Instituto de Astrofísica de Canarias
Thüringer Landessternwarte Tautenburg
T. Guillot
Observatoire de la Cote d'Azur
G. Montagnier
Observatoire de Haute-Provence
Institut d 'Astrophysique de Paris
C. Moutou
Canada France Hawaii Telescope Corporation
C. Lovis
University of Geneva
D. Queloz
University of Cambridge
A. Santerne
Laboratoire d'Astrophysique de Marseille
S. Udry
University of Geneva
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 619 A115Subject Categories
Aerospace Engineering
Astronomy, Astrophysics and Cosmology
Biomedical Laboratory Science/Technology
Infrastructure
Onsala Space Observatory
DOI
10.1051/0004-6361/201833180