A long-period eccentric substellar companion to the evolved intermediate-mass star HD 14067

被引：11
|
作者：
Wang, Liang [1 ]
Sato, Bun'ei [2 ]
Omiya, Masashi [2 ]
Harakawa, Hiroki [2 ]
Liu, Yujuan [1 ]
Song, Nan [1 ,3 ]
He, Wei [1 ,3 ]
Wu, Xiaoshu [1 ,3 ]
Izumiura, Hideyuki [4 ,5 ]
Kambe, Eiji [4 ]
Takeda, Yoichi [5 ,6 ]
Yoshida, Michitoshi [7 ]
Itoh, Yoichi [8 ]
Ando, Hiroyasu [6 ]
Kokubo, Eiichiro [6 ]
Ida, Shigeru [2 ]
Zhao, Gang [1 ]
机构：
[1] Chinese Acad Sci, Natl Astron Observat, Key Lab Opt Astron, Beijing 100012, Peoples R China
[2] Tokyo Inst Technol, Meguro Ku, Tokyo 1528550, Japan
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Natl Astron Observ Japan, Okayama Astrophys Observ, Okayama 7190232, Japan
[5] Grad Univ Adv Studies, Hayama, Kanagawa 2400193, Japan
[6] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan
[7] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan
[8] Univ Hyogo, Ctr Astron, Nishi Harima Astron Observ, Sayo, Hyogo 6795313, Japan
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2014年 / 66卷 / 06期
基金：
日本学术振兴会; 中国国家自然科学基金;
关键词：
planetary systems; stars: individual (HD 14067); techniques: radial velocities; PLANETARY COMPANIONS; GIANT PLANET; EXTRASOLAR PLANETS; RADIAL-VELOCITIES; MODEL SELECTION; OKAYAMA HIDES; IODINE CELLS; SUBARU HDS; K-GIANT; PARAMETERS;
D O I：
10.1093/pasj/psu113
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on the detection of a substellar companion orbiting an evolved intermediate-mass (M-star = 2.4 M-circle dot) star HD14067 (G9 III) using a precise Doppler technique. Either a periodic Keplerian variation with a decreasing linear velocity trend (P=1455 d, K-1 = 92.2 m s(-1), e=0.533, and (gamma) over dot = -22.4 m s(-1) yr(-1)) or a single Keplerian orbit without linear trend (P=2850 d, K-1 = 100.1 m s(-1), and e=0.697) can be well fitted to the radial velocities of this star. The minimum mass (m(2) sin i=7.8 M-J for the model with a linear trend, or m(2) sin i=9.0 M-J for the model without a linear trend) suggests a long-period giant planet orbiting an evolved intermediate-mass star. The eccentricity of the orbit is among the highest ones ever detected for planets moving around evolved stars.
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页数：9
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