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

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 fi...

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Guardado en:
Detalles Bibliográficos
Publicado: 2018
Materias:
Brown dwarfs
Planetary systems
Planets and satellites: Dynamical evolution and stability
Stars: Individual: CoRoT-20
Stars: Low-mass
Techniques: Radial velocities
Orbits
Satellites
Planetary system
Planets and satellites: dynamical evolution and stabilities
Stars: individual
Stars: low mass
Techniques: radial velocities
Stars
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v619_n_p_Rey
http://hdl.handle.net/20.500.12110/paper_00046361_v619_n_p_Rey
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario: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. © 2018 ESO.

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