The Pan-Pacific planet search. VII. The most eccentric planet orbiting a giant star
Article
Article Title | The Pan-Pacific planet search. VII. The most eccentric planet orbiting a giant star |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Jones, M. I. (Author), Horner, Jonathan (Author), Kane, Stephen R. (Author), Marshall, J. P. (Author), Mustill, A. J. (Author), Jenkins, J. S. (Author), Pena Rojas, P. A. (Author), Zhao, Jinlin (Author), Villaver, Eva (Author), Butler, R. P. (Author) and Clark, Jake (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 154 (6), pp. 1-13 |
Article Number | 274 |
Number of Pages | 13 |
Year | 2017 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aa9894 |
Web Address (URL) | http://iopscience.iop.org/article/10.3847/1538-3881/aa9894 |
Abstract | 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. |
Keywords | extrasolar planets; planetary systems; HD 76920; radial velocities |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 519999. Other physical sciences not elsewhere classified |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | Computational Engineering and Science Research Centre |
European Southern Observatory (ESO), Chile | |
University of California, United States | |
University of Chile, Chile | |
Lund University, Sweden | |
University of New South Wales | |
Autonomous University of Madrid, Spain | |
Carnegie Institution of Washington, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4xy1/the-pan-pacific-planet-search-vii-the-most-eccentric-planet-orbiting-a-giant-star
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