
Alexander Mustill
Researcher

The Pan-Pacific Planet Search. VII. the Most Eccentric Planet Orbiting a Giant Star
Author
Summary, in English
Radial velocity observations from three instruments reveal the presence of a 4 M Jup planet candidate orbiting the K giant HD 76920. HD 76920b has an orbital eccentricity of 0.856 ±0.009, making it the most eccentric planet known to orbit an evolved star. There is no indication that HD 76920 has an unseen binary companion, suggesting a scattering event rather than Kozai oscillations as a probable culprit for the observed eccentricity. The candidate planet currently approaches to about four stellar radii from its host star, and is predicted to be engulfed on a ∼100 Myr timescale due to the combined effects of stellar evolution and tidal interactions.
Department/s
- Lund Observatory - Undergoing reorganization
Publishing year
2017-12-01
Language
English
Publication/Series
The Astronomical Journal
Volume
154
Issue
6
Links
Document type
Journal article
Publisher
IOP Publishing
Topic
- Astronomy, Astrophysics and Cosmology
Keywords
- planetary systems
- stars: evolution
- stars: individual (HD 76920)
- techniques: radial velocities
Status
Published
Project
- IMPACT: Comets, asteroids and the habitability of planets
ISBN/ISSN/Other
- ISSN: 0004-6256