A SUBSTELLAR COMPANION IN A 1.3 yr NEARLY CIRCULAR ORBIT OF HD 16760

作者：Sato Bun'ei^*; Fischer Debra A; Ida Shigeru; Harakawa Hiroki; Omiya Masashi; Johnson John A; Marcy Geoffrey W; Toyota Eri; Hori Yasunori; Isaacson Howard; Howard Andrew W; Peek Kathryn M G

来源：Astrophysical Journal, 2009, 703(1): 671-674.

DOI：10.1088/0004-637X/703/1/671

• planetary systems
• stars: individual (HD 16760)

We report the detection of a substellar companion orbiting the G5 dwarf HD 16760 from the N2K sample. Precise Doppler measurements of the star from Subaru and Keck revealed a Keplerian velocity variation with a period of 466.47 /- 0.35 d, a semiamplitude of 407.71 /- 0.84 m s(-1), and an eccentricity of 0.084 /- 0.003. Adopting a stellar mass of 0.78 /- 0.05 M(circle dot), we obtain a minimum mass for the companion of 13.13 /- 0.56 M(JUP), which is close to the planet/brown-dwarf transition, and the semimajor axis of 1.084 /- 0.023 AU. The nearly circular orbit despite the large mass and intermediate orbital period makes this companion unique among known substellar companions.

• 出版日期2009-9