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.

引用

页码：84 / 92

页数：9

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