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

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 690卷 / 01期

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.

引用

页码：743 / 747

页数：5

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