Multiple companions to HD 154857 and HD 160691
Article
Article Title | Multiple companions to HD 154857 and HD 160691 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | McCarthy, Chris (Author), Butler, R. Paul (Author), Tinney, C. G. (Author), Jones, Hugh R. A. (Author), Marcy, Geoffrey W. (Author), Carter, Brad (Author), Penny, Alan J. (Author) and Fischer, Debra A. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 617 (1), pp. 575-579 |
Year | 2004 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1086/425214 |
Web Address (URL) | https://iopscience.iop.org/article/10.1086/425214 |
Abstract | Precise Doppler measurements from the Anglo-Australian Telescope (AAT) UCLES spectrometer reveal two companions to both HD 154857 and HD 160691. The inner companion to HD 154857 has a period of 398 days, an eccentricity of 0.51, and a minimum mass of 1.8MJ. An outer companion has a period much longer than 2 yr and is currently detected only as a linear trend of 14 m s -1 yr-1. The inner companion to HD 160691, previously announced from AAT data, has a period of 645 days, an eccentricity of 0.20, and a minimum mass of 1.7MJ. For the outer planet, whose orbit is less well constrained, a two-Keplerian fit yields a period of 8.2 yr, an eccentricity of 0.57, and a minimum mass of 3.1MJ. With these orbital parameters, its maximum separation from the star of 0″.4 makes it a viable target for direct imaging. |
Keywords | planetary systems, stars, HD 154857, HD 160691 |
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 | Carnegie Institution of Washington, United States |
Anglo-Australian Observatory, Australia | |
University of Hertfordshire, United Kingdom | |
University of California, United States | |
Department of Biological and Physical Sciences | |
Rutherford Appleton Laboratory, United Kingdom | |
San Francisco State University, United States |
https://research.usq.edu.au/item/9x8z0/multiple-companions-to-hd-154857-and-hd-160691
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