Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314

被引：37

作者：

Sato, Bun'ei ^{[1
]}

Omiya, Masashi ^{[2
]}

Liu, Yujuan ^{[3
]}

Harakawa, Hiroki ^{[4
]}

Izumiura, Hideyuki ^{[5
,6
]}

Kambe, Eiji ^{[5
]}

Toyota, Eri ^{[7
]}

Murata, Daisuke ^{[8
]}

Lee, Byeong-Cheol ^{[2
,9
]}

Masuda, Seiji ^{[10
]}

Takeda, Yoichi ^{[6
,11
]}

Yoshida, Michitoshi ^{[12
]}

Itoh, Yoichi ^{[8
]}

Ando, Hiroyasu ^{[6
,11
]}

Kokubo, Eiichiro ^{[6
,11
]}

Ida, Shigeru ^{[4
]}

Zhao, Gang ^{[13
]}

Han, Inwoo ^{[2
]}

机构：

[1] Tokyo Inst Technol, Global Edge Inst, Meguro Ku, Tokyo 1528550, Japan

[2] Korea Astron & Space Sci Inst, Taejon 305348, South Korea

[3] Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China

[4] Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan

[5] Natl Inst Nat Sci, Natl Astron Observ Japan, Okayama Astrophys Observ, Kamogata, Okayama 7190232, Japan

[6] Grad Univ Adv Studies, Kanagawa 2400193, Japan

[7] Kobe Sci Museum, Chuo Ku, Kobe, Hyogo 6500046, Japan

[8] Kobe Univ, Grad Sch Sci, Nada Ku, Kobe, Hyogo 6578501, Japan

[9] Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Taegu 702701, South Korea

[10] Tokushima Sci Museum, Itano, Tokushima 7790111, Japan

[11] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan

[12] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan

[13] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2010年 / 62卷 / 04期

基金：

日本学术振兴会; 中国国家自然科学基金;

关键词：

stars: individual (HD 145457); stars: individual (HD 180314); stars: planetary systems; techniques: radial velocities; GIANT PLANET FORMATION; F-TYPE STARS; EXTRASOLAR PLANETS; OKAYAMA HIDES; BROWN DWARFS; IODINE CELLS; SUBARU HDS; K-GIANTS; EXOPLANETS; ABUNDANCES;

D O I：

10.1093/pasj/62.4.1063

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the detection of two substellar companions orbiting around evolved intermediate-mass stars by precise Doppler measurements at Subaru Telescope and Okayama Astrophysical Observatory. HD 145457 is a K0 giant with a mass of 1.9 M-circle dot, and has a planet of minimum mass, m(2) sin i = 2.9 M-J, orbiting with a period of P = 176 d and eccentricity of e = 0.11. HD 180314 is also a K0 giant with 2.6 M-circle dot, and hosts a substellar companion of m2 sin i = 22 M-J, which falls in the brown-dwarf mass regime, in an orbit with P = 396 d and e = 0.26. HD 145457b is one of the innermost planets and HD 180314 b is the seventh candidate of a brown-dwarf-mass companion found around evolved intermediate-mass stars.

引用

页码：1063 / 1069

页数：7

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