A double planetary system around the evolved intermediate-mass star HD 4732
Article
Article Title | A double planetary system around the evolved intermediate-mass star HD 4732 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Sato, Bun'Ei (Author), Omiya, Masashi (Author), Wittenmyer, Robert A. (Author), Harakawa, Hiroki (Author), Nagasawa, Makiko (Author), Izumiura, Hideyuki (Author), Kambe, Eiji (Author), Takeda, Yoichi (Author), Yoshida, Michitoshi (Author), Itoh, Yoichi (Author), Ando, Hiroyasu (Author), Kokubo, Eiichiro (Author) and Ida, Shigeru (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 762 (1) |
Article Number | 9 |
Number of Pages | 7 |
Year | 2013 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/762/1/9 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/762/1/9 |
Abstract | We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observatory and Australian Astronomical Observatory. The star is a K0 subgiant with a mass of 1.7 M⊙ and solar metallicity. The planetary system is composed of two giant planets with minimum mass of m sin i = 2.4 MJ, orbital period of 360.2 days and 2732 days, and eccentricity of 0.13 and 0.23, respectively. Based on dynamical stability analysis for the system, we set the upper limit on the mass of the planets to be about 28 MJ (i greater than 5°) in the case of coplanar prograde configuration. |
Keywords | planetary systems; individual stars(HD 4732); techniques - radial velocities; |
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 | Tokyo Institute of Technology, Japan |
University of New South Wales | |
National Astronomical Observatory of Japan, Japan | |
Graduate University for Advanced Studies, Japan | |
Hiroshima University, Japan | |
University of Hyogo, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q41v7/a-double-planetary-system-around-the-evolved-intermediate-mass-star-hd-4732
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