A possible substellar companion to the intermediate-mass giant HD 175679
A possible substellar companion to the intermediate-mass giant HD 175679
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DOI：
10.1088/1674-4527/12/1/007
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发表时间：
2011-10
影响因子：
1.8
通讯作者：
Liang-Yao Wang;B. Sato;Gang Zhao;Yujuan Liu;K. Noguchi;H. Ando;H. Izumiura;E. Kambe;M. Omiya;H. Harakawa;Fan Liu;Xiaoshu Wu;Y. Takeda;Michitoshi Yoshida;E. Kokubo
中科院分区：
文献类型：
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作者：
Liang-Yao Wang;B. Sato;Gang Zhao;Yujuan Liu;K. Noguchi;H. Ando;H. Izumiura;E. Kambe;M. Omiya;H. Harakawa;Fan Liu;Xiaoshu Wu;Y. Takeda;Michitoshi Yoshida;E. Kokubo
我们报告在中等质量巨星HD 175679周围发现了一颗亚星伴星。兴隆站和冈山天体物理观测站对这颗星星的精确径向速度数据显示，它的轨道周期为1366.8 ± 5.7 d，半振幅为380.2 ± 3.2 ms −1，离心率为0.378 ± 0.008。采用2.7 ± 0.3兆焦耳的恒星质量，我们得到HD 175679 B的最小质量为37.3 ± 2.8兆焦耳，半长轴为3.36 ± 0.12 Au。这一发现是中国和日本联合行星搜索计划中的第二个棕矮星伴星候选者。
We report the discovery of a substellar companion around the intermediate-mass 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 ± 3.2ms−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.