M2K: I. A Jupiter-Mass Planet Orbiting the M3V Star HIP 79431
M2K: I. A Jupiter-Mass Planet Orbiting the M3V Star HIP 79431
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M2K：I. 一颗木星质量的行星绕 M3V 恒星 HIP 79431
DOI：
10.1086/651058
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发表时间：
2010
影响因子：
3.5
通讯作者：
S. Lepine
中科院分区：
文献类型：
--
作者：
K. Apps;K. Clubb;D. Fischer;E. Gaidos;A. Howard;J. Johnson;G. Marcy;H. Isaacson;M. Giguere;J. Valenti;Victor Rodriguez;Carley Chubak;S. Lepine
凯克天文台的多普勒观测显示，存在一颗msini为2.1 MJup的行星，围绕M3V恒星HIP 79431运行。这是在多普勒M矮星巡天中发现的第六颗巨行星，也是在M矮星周围发现的质量最大的行星之一。这颗行星的轨道周期为111.7天，轨道离心率为0.29。主星富含金属，估计[Fe/H] = +0.4。这是我们对1600颗m - k矮星进行的新调查中发现的第一颗行星。
Doppler observations from Keck Observatory reveal the presence of a planet with M sin i of 2.1 MJup orbiting the M3V star HIP 79431. This is the sixth giant planet to be detected in Doppler surveys of M dwarfs and it is one of the most massive planets discovered around an M dwarf star. The planet has an orbital period of 111.7 days and an orbital eccentricity of 0.29. The host star is metal rich, with an estimated [Fe/H] = +0.4. This is the first planet to emerge from our new survey of 1600 M-to-K dwarf stars.