학술논문
Brown dwarf companion with a period of 4.6 yr interacting with the hot Jupiter CoRoT-20b
Document Type
Author
Source
Astronomy and Astrophysics. 619
Subject
Language
English
ISSN
0004-6361
1432-0746
1432-0746
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 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.