THE MASS OF THE CANDIDATE EXOPLANET COMPANION TO HD 136118 FROM HUBBLE SPACE TELESCOPE ASTROMETRY AND HIGH-PRECISION RADIAL VELOCITIES
THE MASS OF THE CANDIDATE EXOPLANET COMPANION TO HD 136118 FROM HUBBLE SPACE TELESCOPE ASTROMETRY AND HIGH-PRECISION RADIAL VELOCITIES
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DOI：
10.1088/0004-637x/708/1/625
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发表时间：
2007-05
期刊：
影响因子：
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通讯作者：
J. Bean;B. Mcarthur;G. Benedict;T. Harrison;Dmitry;Bizyaev;E. Nelan;Verne V. Smith
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文献类型：
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作者：
J. Bean;B. Mcarthur;G. Benedict;T. Harrison;Dmitry;Bizyaev;E. Nelan;Verne V. Smith
我们使用哈勃太空望远镜精细的指导传感器天体测量和高节奏的径向速度HD 136118从霍比-埃伯利望远镜与档案数据从利克确定完整的一套轨道参数HD 136118 B。我们发现候选系外行星的轨道倾角为ib = 163. ° 1 ± 3. ° 0。这就确定了物体的实际质量Mb = 42 + 11 − 18 MJ，而不是仅根据径向速度数据确定的最小质量Mbsin i <$12 MJ。因此，HD 136118的低质量伴星现在被认为是一颗可能居住在“棕矮星沙漠”的棕矮星。
We use Hubble Space Telescope fine guidance sensor astrometry and high-cadence radial velocities for HD 136118 from the Hobby–Eberly Telescope with archival data from Lick to determine the complete set of orbital parameters for HD 136118 b. We find an orbital inclination for the candidate exoplanet of ib = 163.°1 ± 3.°0. This establishes the actual mass of the object, Mb = 42+11−18 MJ, in contrast to the minimum mass determined from the radial velocity data only, Mbsin i ∼ 12 MJ. Therefore, the low-mass companion to HD 136118 is now identified as a likely brown dwarf residing in the “brown dwarf desert.”