Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis

	Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis
	Sato, Bun'ei 1; Omiya, Masashi 1; Harakawa, Hiroki 1; Liu, Yu-Juan 2; Izumiura, Hideyuki 3,4; Kambe, Eiji 3; Takeda, Yoichi 4,5; Yoshida, Michitoshi 6; Itoh, Yoichi 7; Ando, Hiroyasu 4,5
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2013-08-25
卷号	65 期号:4
关键词	planetary systems stars: individual: HD 2952 stars: individual: HD 120084 stars: individual: omega Ser techniques: radial velocities
英文摘要	We report on the detections of planetary companions orbiting around three evolved intermediate-mass stars based on precise radial velocity measurements at Okayama Astrophysical Observatory. HD 2952 (K0III, 2.5 M-circle dot) and omega Ser (G8III, 2.2 M-circle dot) host a relatively low-mass planet with minimum masses of m(2)sini = 1.6 M-J and 1.7 M-J in nearly circular orbits with periods of P = 312 and 277 d, respectively. HD 120084 (G7 III, 2.4 M-circle dot) hosts an eccentric planet with m(2)sini = 4.5 M-J in an orbit with P = 2082 d and an eccentricity of e = 0.66. The planet has one of the largest eccentricities among those ever discovered around evolved intermediate-mass stars, almost all of which have an eccentricity smaller than 0.4. We also show that the radial-velocity variations of stellar oscillations for G giants can be averaged out below a level of a few m s(-1), at least on a timescale of a week by high-cadence observations. This enables us to detect a super-Earth and a Neptune-mass planet in short-period orbits even around such giant stars.
收录类别	SCI
语种	英语
WOS记录号	WOS:000330328300016
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5948]
专题	国家天文台_光学天文研究部
作者单位	1.Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 3.Natl Astron Observ Japan, Okayama Astrophys Observ, Kamogata, Okayama 7190232, Japan 4.Grad Univ Adv Studies, Hayama, Kanagawa 2400193, Japan 5.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 6.Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan 7.Univ Hyogo, Ctr Astron, Nishi Harima Astron Observ, Sayo, Hyogo 6795313, Japan
推荐引用方式 GB/T 7714	Sato, Bun'ei,Omiya, Masashi,Harakawa, Hiroki,et al. Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(4).
APA	Sato, Bun'ei.,Omiya, Masashi.,Harakawa, Hiroki.,Liu, Yu-Juan.,Izumiura, Hideyuki.,...&Ida, Shigeru.(2013).Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(4).
MLA	Sato, Bun'ei,et al."Planetary Companions to Three Evolved Intermediate-Mass Stars: HD 2952, HD 120084, and omega Serpentis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.4(2013).