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.

引用

页数：9

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