A Substellar Companion to the Intermediate-Mass Giant 11 Comae
A Substellar Companion to the Intermediate-Mass Giant 11 Comae
复制标题
中等质量巨星 11 彗发的亚恒星伴星
DOI:
10.1086/523297
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发表时间:
2007-09
影响因子:
4.9
通讯作者:
Bun'ei Sato
中科院分区:
文献类型:
--
作者:
et a;Zhao G.;Wang H.;Liu Y. J.;K. Noguchi;Bun'ei Sato
We report the detection of a substellar companion orbiting the intermediate-mass giant star 11 Com (G8 III). Precise Doppler measurements of the star from Xinglong Station and Okayama Astrophysical Observatory (OAO) reveal Keplerian velocity variations with an orbital period of 326.03 ± 0.32 days, a semiamplitude of 302.8 ± 2.6 m s−1, and an eccentricity of 0.231 ± 0.005. Adopting a stellar mass of 2.7 ± 0.3 M☉, the minimum mass of the companion is 19.4 ± 1.5 MJ, well above the deuterium-burning limit, and the semimajor axis is 1.29 ± 0.05 AU. This is the first result from a joint planet-search program between China and Japan aimed at revealing the statistics of substellar companions around intermediate-mass giants. 11 Com b emerged from 300 targets of the planet-search program at OAO. The program's current detection rate of brown dwarf candidates seems to be comparable to the rate of such detections around solar-type stars with orbital separations of ≲3 AU.
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DOI:
10.1086/341629
发表时间:
2002-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Frink;D. Mitchell;A. Quirrenbach
通讯作者:
S. Frink;D. Mitchell;A. Quirrenbach
影响因子:
3.5
作者:
R. P. Butler;G. Marcy;E. G. Williams;C. McCarthy;P. Dosanjh;S. Vogt
通讯作者:
R. P. Butler;G. Marcy;E. G. Williams;C. McCarthy;P. Dosanjh;S. Vogt
DOI:
10.1046/j.1365-8711.2000.03333.x
发表时间:
2000-02
影响因子:
4.8
作者:
M. Bate
通讯作者:
M. Bate
DOI:
10.1111/j.1365-2966.2003.07317.x
发表时间:
2003-10
影响因子:
4.8
作者:
W. Rice;P. Armitage;I. Bonnell;M. Bate;S. Jeffers;S. Vine
通讯作者:
W. Rice;P. Armitage;I. Bonnell;M. Bate;S. Jeffers;S. Vine
影响因子:
6.5
作者:
J. D. Medeiros;J. R. P. Silva;J. D. D. Nascimento-J.-D.-D.-Nascimento-2248203267;B. C. Martins;L. D. Silva;C. Melo;M. Burnet
通讯作者:
J. D. Medeiros;J. R. P. Silva;J. D. D. Nascimento-J.-D.-D.-Nascimento-2248203267;B. C. Martins;L. D. Silva;C. Melo;M. Burnet