Three low-mass planets from the Anglo-Australian planet search
Article
Article Title | Three low-mass planets from the Anglo-Australian planet search |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Tinney, C. G. (Author), Butler, R. Paul (Author), Marcy, Geoffrey W. (Author), Jones, Hugh R. A. (Author), Penny, Alan J. (Author), McCarthy, Chris (Author), Carter, Brad D. (Author) and Fischer, Debra A. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 623 (2), pp. 1171-1179 |
Number of Pages | 9 |
Year | 2005 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1086/428661 |
Web Address (URL) | https://iopscience.iop.org/article/10.1086/428661 |
Abstract | We report the detection of three new low-mass planets from the Anglo-Australian Planet Search. The three parent stars of these planets are chrornospherically quiet main-sequence G dwarfs with metallicities ranging from roughly solar (HD 117618 and HD 208487) to metal enriched (HD 102117). The orbital periods range from 20.8 to 130 days, the minimum masses from roughly 0.5MSat to 0.5MJup, and the eccentricities from 0.08 to 0.37, with the planet in the smallest orbit (HD 102117) having the smallest eccentricity. With semiamplitudes of 10.6-19 m s-1, these planets induce Doppler amplitudes similar to those of Jupiter analogs, albeit with shorter periods. Many of the most interesting future Doppler planets will be detected at these semiamplitude levels, placing a premium on measurement precision. The detection of such amplitudes in data extending back 6 yr gives confidence in the Anglo-Australian Planet Search's ability to detect Jupiter analogs as our time baseline extends to 12 yr. We discuss the criticality of such detections for the design of the next generation of extremely large telescopes and also highlight prospects for suitable observing strategies to push to below 1 m s-1 precisions for bright stars in a search for sub-Neptunian planets. |
Keywords | planetary systems, stars, HD 102117, HD 117618, HD 208487 |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | Anglo-Australian Observatory, Australia |
Carnegie Institution of Washington, United States | |
University of California, United States | |
University of Hertfordshire, United Kingdom | |
Rutherford Appleton Laboratory, United Kingdom | |
Department of Biological and Physical Sciences |
https://research.usq.edu.au/item/9x8z5/three-low-mass-planets-from-the-anglo-australian-planet-search
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