DETECTION OF A LOW-ECCENTRICITY AND SUPER-MASSIVE PLANET TO THE SUBGIANT HD 38801

被引：8

作者：

Harakawa, Hiroki ^{[1
]}

Sato, Bun'ei ^{[2
]}

Fischer, Debra A. ^{[3
,4
]}

Ida, Shigeru ^{[1
]}

Omiya, Masashi ^{[5
]}

Johnson, John A. ^{[6
]}

Marcy, Geoffrey W. ^{[7
]}

Toyota, Eri ^{[8
]}

Hori, Yasunori ^{[1
]}

Howard, Andrew W. ^{[7
]}

机构：

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

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

[3] San Francisco State Univ, Dept Phys & Astron, San Francisco, CA 94132 USA

[4] Yale Univ, Dept Astron, New Haven, CT 06511 USA

[5] Tokai Univ, Dept Phys, Kanagawa 2591292, Japan

[6] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA

[7] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

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

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 715卷 / 01期

关键词：

planetary systems; stars: individual (HD 38801); techniques: radial velocities; techniques: spectroscopic; SUBSTELLAR COMPANIONS; N2K CONSORTIUM; GIANT PLANETS; OKAYAMA HIDES; IODINE CELLS; SUBARU HDS; STARS; EXOPLANETS; SPECTROMETER; METALLICITY;

D O I：

10.1088/0004-637X/715/1/550

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of a large mass planet orbiting around the K0 metal-rich subgiant HD38801 (V = 8.26) by precise radial velocity (RV) measurements from the Subaru Telescope and the Keck Telescope. The star has a mass of 1.36 M(circle dot) and a metallicity of [Fe/H] = +0.26. The RV variations are consistent with a circular orbit with a period of 696.0 days and a velocity semiamplitude of 200.0 m s(-1), which yield a minimum mass for the companion of 10.7 M(JUP) and a semimajor axis of 1.71 AU. Such super-massive objects with very low eccentricities and periods of hundreds of days are uncommon among the ensemble of known exoplanets.

引用

页码：550 / 553

页数：4

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