The Pan-Pacific planet search. II. Confirmation of a two-planet system around HD 121056
Article
Article Title | The Pan-Pacific planet search. II. Confirmation of a two-planet system around HD 121056 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Wang, Liang (Author), Liu, Fan (Author), Horner, Jonathan (Author), Endl, Michael (Author), Johnson, John Asher (Author), Tinney, C. G. (Author) and Carter, B. D. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 800 (74), pp. 1-8 |
Article Number | 74 |
Number of Pages | 8 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/800/1/74 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/800/1/74 |
Abstract | Precise radial velocities from the Anglo-Australian Telescope confirm the presence of a rare short-period planet around the K0 giant HD 121056. An independent two-planet solution using the AAT data shows that the inner planet has P=89.1+/-0.1 days, and m sin i=1.35+/-0.17 Mjup. These data also confirm the planetary nature of the outer companion, with m sin i=3.9+/-0.6 Mjup and a=2.96+/-0.16 AU. HD 121056 is the most-evolved star to host a confirmed multiple-planet system, and is a valuable example of a giant star hosting both a short-period and a long-period planet. |
Keywords | astrophysics; earth and planetary astrophysics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | University of New South Wales |
Key Laboratory of Optical Astronomy, China | |
Australian National University | |
Computational Engineering and Science Research Centre | |
University of Texas at Austin, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Centre for Astronomy, Solar Radiation and Climate | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2wv8/the-pan-pacific-planet-search-ii-confirmation-of-a-two-planet-system-around-hd-121056
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