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A JUPITER-LIKE PLANET ORBITING THE NEARBY M DWARF GJ 832
被引:69
作者:
Bailey, Jeremy
[1
]
Butler, R. Paul
[2
]
Tinney, C. G.
[3
]
Jones, Hugh R. A.
[4
]
O'Toole, Simon
[4
,5
]
Carter, Brad D.
[6
]
Marcy, Geoffrey W.
[7
]
机构:
[1] Macquarie Univ, Dept Phys, N Ryde, NSW 2109, Australia
[2] Carnegie Inst Washington, Dept Terr Magnetism, Washington, DC 20015 USA
[3] Univ New S Wales, Sch Phys, Dept Astrophys, Sydney, NSW 2052, Australia
[4] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
[5] Anglo Australian Observ, Epping, NSW 1710, Australia
[6] Univ So Queensland, Fac Sci, Toowoomba, Qld 4350, Australia
[7] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
关键词:
planetary systems;
stars: individual (GJ 832);
ANGLO-AUSTRALIAN PLANET;
EXTRA-SOLAR PLANETS;
M-CIRCLE-PLUS;
PARENT STARS;
GIANT PLANET;
HARPS SEARCH;
MASS PLANETS;
HOST STARS;
MILKY-WAY;
SYSTEM;
D O I:
10.1088/0004-637X/690/1/743
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
Precision Doppler velocity measurements from the Anglo-Australian Telescope reveal a planet with a 9.4 +/- 0.4 year period orbiting the M1.5 dwarf GJ 832. Within measurement uncertainty the orbit is circular, and the minimum mass (m sin i) of the planet is 0.64 +/- 0.06 M(JUP). GJ 832 appears to be depleted in metals by at least 50% relative to the Sun, as are a significant fraction of the M dwarfs known to host exoplanets. GJ 832 adds another Jupiter-mass planet to the known census of M dwarf exoplanets, which currently includes a significant number of Neptune-mass planets. GJ 832 is an excellent candidate for astrometric orbit determination with alpha sin i = 0.95 mas. GJ 832b has the second largest angular distance from its star among radial velocity detected exoplanets (0.69 arcsec) making it a potentially interesting target for future direct detection.
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页码:743 / 747
页数:5
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