Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-11-24
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
35 pages, 12 figures, 10 tables. Accepted for publication in Astrophysical Journal
Scientific paper
We use Hubble Space Telescope Fine Guidance Sensor astrometry and high-cadence radial velocities for HD136118 from the HET with archival data from Lick to determine the complete set of orbital parameters for HD136118b. We find an orbital inclination for the candidate exoplanet of i_{b} = 163.1 +- 3.0 deg. This establishes the actual mass of the object, M_{b} = 42^{+11}_{-18} MJup, in contrast to the minimum mass determined from the radial velocity data only, M_{b}sin{i} ~ 12 MJup. Therefore, the low-mass companion to HD 136118 is now identified as a likely brown dwarf residing in the "brown dwarf desert".
Armstrong Amber
Bean Jacob L.
Benedict George F.
Harrison Thomas E.
Martioli Eder
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