Journal
ASTROPHYSICAL JOURNAL
Volume 672, Issue 1, Pages 553-557Publisher
IOP PUBLISHING LTD
DOI: 10.1086/523297
Keywords
planetary systems; stars : individual (11 Comae = HD 107383); stars : low-mass; brown dwarfs; techniques : radial velocities
Categories
Ask authors/readers for more resources
We report the detection of a substellar companion orbiting the intermediate-mass giant star 11 Com (G8 III). Precise Doppler measurements of the star from Xinglong Station and Okayama Astrophysical Observatory (OAO) reveal Keplerian velocity variations with an orbital period of 326.03 +/- 0.32 days, a semiamplitude of 302.8 +/- 2.6 m s(-1), and an eccentricity of 0.231 +/- 0.005. Adopting a stellar mass of 2.7 +/- 0.3 M circle dot, the minimum mass of the companion is 19.4 +/- 1.5 M-J, well above the deuterium-burning limit, and the semimajor axis is 1.29 +/- 0.05 AU. This is the first result from a joint planet-search program between China and Japan aimed at revealing the statistics of substellar companions around intermediate-mass giants. 11 Com b emerged from 300 targets of the planet-search program at OAO. The program's current detection rate of brown dwarf candidates seems to be comparable to the rate of such detections around solar-type stars with orbital separations of less than or similar to 3 AU.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available