The Anglo-Australian planet search. XXII. Two new multi-planet systems
Article
Article Title | The Anglo-Australian planet search. XXII. Two new multi-planet systems |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Horner, J. (Author), Tuomi, Mikko (Author), Salter, G. S. (Author), Tinney, C. G. (Author), Butler, R. P. (Author), Jones, H. R. A. (Author), O'Toole, S. J. (Author), Bailey, J. (Author), Carter, B. D. (Author), Jenkins, J. S. (Author), Zhang, Z. (Author), Vogt, S. S. (Author) and Rivera, Eugenio J. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 753 (2), pp. 1-12 |
Article Number | 169 |
Number of Pages | 12 |
Year | 2012 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/753/2/169 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/753/2/169 |
Abstract | We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 ± 427 days, and a minimum mass of 5.3 M Jup. HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 ± 0.07). The second planet in the HD 159868 system has a period of 352.3 ± 1.3 days and m sin i = 0.73 ± 0.05 M Jup. In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems |
Keywords | planetary systems; HD 142; HD 159868; techniques; radial velocities |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of New South Wales |
University of Hertfordshire, United Kingdom | |
Carnegie Institution of Washington, United States | |
Anglo-Australian Observatory, Australia | |
Centre for Astronomy, Solar Radiation and Climate | |
University of Chile, Chile | |
University of California, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q1920/the-anglo-australian-planet-search-xxii-two-new-multi-planet-systems
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