Korean-Japanese Planet Search Program: Substellar Companions around Intermediate-Mass Giants

被引：0

作者：

Omiya, Masashi ^{[1
]}

Han, Inwoo ^{[1
]}

Izumiura, Hideyuki ^{[2
,3
]}

Lee, Byeong-Cheol ^{[1
]}

Sato, Bun'ei

Kim, Kang-Min ^{[1
]}

Yoon, Tae Seog ^{[5
]}

Kambe, Eiji ^{[2
]}

Yoshida, Michitoshi ^{[6
]}

Masuda, Seiji ^{[7
]}

Toyota, Eri ^{[4
,8
]}

Urakawa, Seitaro ^{[9
]}

Takada-Hidai, Masahide ^{[10
]}

机构：

[1] Korea Astron & Space Sci Inst, 61-1 Hwaam Dong, Taejon 305348, South Korea

[2] Natl Astron Observ Japan, Okayama Astrophys Observ, Okayama, Japan

[3] Grad Univ Adv Studies, Dept Astron Sci, Okayama 2400193, Japan

[4] Tokyo Inst Technol, Tokyo 1528550, Japan

[5] Kyungpook Natl Univ, Dept Astron & Atmosphere Sci, Taegu 702701, South Korea

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

[7] Tokushima Sci Museum, Hiroshima 7790111, Japan

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

[9] Japan Spaceguard Assoc, Bisei Spaceguard Ctr, Okayama 7141411, Japan

[10] Liberal Arts Educ Ctr, Hiratsuka, Kanagawa 2591292, Japan

来源：

PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE | 2011年 / 1331卷

关键词：

stars: planetary systems; brown dwarfs; techniques: radial velocities; OKAYAMA HIDES; IODINE CELLS; SUBARU HDS; STARS; EXOPLANETS;

D O I：

10.1063/1.3556192

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A Korean-Japanese planet search program has been carried out using the 1.8m telescope at Bohyunsan Optical Astronomy Observatory (BOAO) in Korea, and the 1.88m telescope at Okayama Astrophysical Observatory (OAO) in Japan to search for planets around intermediate-mass giant stars. The program aims to show the properties of planetary systems around such stars by precise Doppler survey of about 190 G or K type giants together with collaborative surveys of the East-Asian Planet Search Network. So far, we detected two substellar companions around massive intermediate-mass giants in the Korean-Japanese planet search program. One is a brown dwarf-mass companion with 37.6 M-J orbiting a giant HD 119445 with 3.9 M-circle dot, which is the most massive brown dwarf companion among those found around intermediate-mass giants. The other is a planetary companion with 1.8 M-J orbiting a giant star with 2.4 M-circle dot, which is the lowest-mass planetary companion among those detected around giant stars with > 1.9 M-circle dot. Plotting these systems on companion mass vs. stellar mass diagram, there seem to exist two unpopulated regions of substellar companions around giants with 1.5-3 M-circle dot and planetary companions orbiting giants with 2.4-4 M-circle dot. The existence of these possible unpopulated regions supports a current characteristic view that more massive substellar companions tend to exist around more massive stars.

引用

页码：122 / +

页数：2

共 23 条

[1] Predicting the properties of binary stellar systems: the evolution of accreting protobinary systems [J].

Bate, MR .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 314 (01) :33-53

[2] Catalog of nearby exoplanets [J].

Butler, R. P. ;

Wright, J. T. ;

Marcy, G. W. ;

Fischer, D. A. ;

Vogt, S. S. ;

Tinney, C. G. ;

Jones, H. R. A. ;

Carter, B. D. ;

Johnson, J. A. ;

McCarthy, C. ;

Penny, A. J. .

ASTROPHYSICAL JOURNAL, 2006, 646 (01) :505-522

[3] Attaining Doppler precision of 3 m s(-1) [J].

Butler, RP ;

Marcy, GW ;

Williams, E ;

McCarthy, C ;

Dosanjh, P ;

Vogt, SS .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1996, 108 (724) :500-509

[4] A giant planet around the massive giant star HD 13189 [J].

Hatzes, AP ;

Guenther, EW ;

Endl, M ;

Cochran, WD ;

Döllinger, MP ;

Bedalov, A .

ASTRONOMY & ASTROPHYSICS, 2005, 437 (02) :743-751

[5]

Hekker S, 2008, ASTRON ASTROPHYS, V480, P215, DOI 10.1051/0004-6361:20078321

[6] Toward a deterministic model of planetary formation. I. A desert in the mass and semimajor axis distributions of extrasolar planets [J].

Ida, S ;

Lin, DNC .

ASTROPHYSICAL JOURNAL, 2004, 604 (01) :388-413

[7]

Izumiura H., 1999, P 4 E AS M ASTR, P77

[8]

IZUMIURA HIDEYUKE, 2005, Journal of the Korean Astronomical Society, V38, P81

[9] A HOT JUPITER ORBITING THE 1.7 M⊙ SUBGIANT HD 102956 [J].

Johnson, John Asher ;

Bowler, Brendan P. ;

Howard, Andrew W. ;

Henry, Gregory W. ;

Marcy, Geoffrey W. ;

Isaacson, Howard ;

Brewer, John Michael ;

Fischer, Debra A. ;

Morton, Timothy D. ;

Crepp, Justin R. .

ASTROPHYSICAL JOURNAL LETTERS, 2010, 721 (02) :L153-L157

[10] Giant Planet Occurrence in the Stellar Mass-Metallicity Plane [J].

Johnson, John Asher ;

Aller, Kimberly M. ;

Howard, Andrew W. ;

Crepp, Justin R. .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2010, 122 (894) :905-915

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