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 Astrofisico de Canarias

University of La Laguna

S.C.C. Barros

Universidade do 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, Galactic Astrophysics

Leiden University

E. W. Guenther

Instituto Astrofisico 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 A115

Subject Categories

Aerospace Engineering

Astronomy, Astrophysics and Cosmology

Biomedical Laboratory Science/Technology

Infrastructure

Onsala Space Observatory

DOI

10.1051/0004-6361/201833180

More information

Latest update

4/4/2019 1