CAJ | 학술논문

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 - 1and 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.