Bibliographic Details
| Title: |
A Substellar Companion in a 1.3 yr Nearly-circular Orbit of HD 16760 |
| Authors: |
Sato, Bunei, 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. |
| Publication Year: |
2009 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Earth and Planetary Astrophysics |
| More Details: |
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, and an eccentricity of 0.084+-0.003. Adopting a stellar mass of 0.78+-0.05 M_Sun, 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.
Comment: 14 pages, 2 figures, accepted for publication in ApJ |
| Document Type: |
Working Paper |
| DOI: |
10.1088/0004-637X/703/1/671 |
| Access URL: |
http://arxiv.org/abs/0907.5080 |
| Accession Number: |
edsarx.0907.5080 |
| Database: |
arXiv |
