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A possible substellar companion to the intermediate-mass giant HD 175679
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作者 Liang Wang Bun'ei Sato +12 位作者 Gang Zhao Yu-Juan Liu Kunio Noguchi Hirovasu Ando Hideyuki Izumiura Eiji Kambe Masashi Omiya Hiroki Harakawa Fan Liu Xiao-Shu Wu Yoichi Takeda Michitoshi Yoshida Eiichiro Kokubo 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第1期84-92,共9页
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 ... 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±3.2 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 M 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. 展开更多
关键词 stars: individual (HD 175679) -- stars: brown dwarfs -- techniques:radial velocities
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