Precise radial velocities of giant stars V. A brown dwarf and a planet orbiting the K giant stars tau Gem and 91 Aqr
摘要：
We aim to detect and characterize substellar companions to K giant stars, to further our knowledge of planet formation and stellar evolution of intermediate-mass stars. For more than a decade we have used Doppler spectroscopy to acquire high precision radial velocity measurements of K giant stars. All data for this survey have been taken at Lick Observatory. Our survey includes 373 G and K giants. Radial velocity data showing periodic variations are fitted with Keplerian orbits using a chi^2 minimization technique. We report the presence of two substellar companions to the K giant stars tau Gem and 91 Aqr. The brown dwarf orbiting tau Gem has an orbital period of 305.5 +/- 0.1 days, a minimum mass of 20.6 M_Jup, and an eccentricity of 0.031 +/- 0.009. The planet orbiting 91 Aqr has an orbital period of 181.4 +/- 0.1 days, a minimum mass of 3.2 M_Jup, and an eccentricity of 0.027 +/- 0.026. Both companions have exceptionally circular orbits for their orbital distance, as compared to all previously discovered planetary companions.Mitchell, D S; Reffert, S; Trifonov, T; Quirrenbach, A; Fischer, D A
展开
关键词：
DOI：
10.1051/0004-6361/201321714
被引量：
年份：
2013
掌桥科研
arXiv.org
OALib
arXiv.org
(全网免费下载)
arXiv.org
(全网免费下载)
查看更多
adsabs.harvard.edu
ResearchGate
(全网免费下载)
ResearchGate
Citeseer
(全网免费下载)
lib-arxiv-008.serverfarm.cornell.edu
(全网免费下载)
钛学术
(全网免费下载)
core.ac.uk
(全网免费下载)
lib-arxiv-008.serverfarm.cornell.edu
cds.cern.ch
mendeley.com
学术范
(全网免费下载)
pubget.com
钛学术
inspirehep.net
学术范
works.bepress.com
core.ac.uk
arXiv.org
(全网免费下载)
arXiv.org
(全网免费下载)
ResearchGate
(全网免费下载)
Citeseer
(全网免费下载)
学术范
(全网免费下载)
core.ac.uk
(全网免费下载)
lib-arxiv-008.serverfarm.cornell.edu
(全网免费下载)
钛学术
(全网免费下载)
通过文献互助平台发起求助，成功后即可免费获取论文全文。
相似文献
参考文献
引证文献
辅助模式
引用
文献可以批量引用啦~
欢迎点我试用！
