A possible substellar companion to the intermediate-mass giant HD 175679

被引：0
|
作者：
Bun'ei Sato [1 ]
Kunio Noguchi [2 ]
Hiroyasu Ando [2 ]
Hideyuki Izumiura [3 ]
Eiji Kambe [3 ]
Masashi Omiya [1 ]
Hiroki Harakawa [1 ]
Yoichi Takeda [2 ]
Michitoshi Yoshida [4 ]
Eiichiro Kokubo [2 ]
机构：
[1] Department of Earth and Planetary Sciences,Graduate School of Science and Engineering,Tokyo Institute of Technology
[2] National Astronomical Observatory of Japan,National Institutes of Natural Sciences
[3] Okayama Astrophysical Observatory,National Astronomical Observatory of Japan,National Institutes of Natural Sciences
[4] Hiroshima Astrophysical Science Center,Hiroshima University
来源：
Research in Astronomy and Astrophysics | 2012年 / 12卷 / 01期
基金：
中国国家自然科学基金; 日本学术振兴会;
关键词：
stars:individual(HD 175679) — stars:brown dwarfs — techniques:radial velocities;
D O I：
暂无
中图分类号：
P141 [实测天体物理学];
学科分类号：
070401 ;
摘要：
We report the discovery of a substellar companion around the intermediatemass giant HD 175679.Precise radial velocity data of the star from the Xinglong Station and the Okayama Astrophysical Observatory revealed a Keplerian velocity variation with an orbital period of 1366.8±5.7 d,a semiamplitude of 380.2±3.2 m s?1 and an eccentricity of 0.378 ± 0.008.Adopting a stellar mass of 2.7 ± 0.3 M,we obtain that the minimum mass of the HD 175679 b is 37.3±2.8 MJ and the semimajor axis is 3.36±0.12 AU.This discovery is the second brown dwarf companion candidate from a joint planet-search program between China and Japan.
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收藏
页码：84 / 92
页数：9
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