DISCOVERY OF A LOW-MASS COMPANION TO THE SOLAR-TYPE STAR TYC 2534-698-1

被引：5

作者：

Kane, Stephen R. ^{[1
]}

Mahadevan, Suvrath ^{[2
]}

Cochran, William D. ^{[3
]}

Street, Rachel A. ^{[4
]}

Sivarani, Thirupathi ^{[2
]}

Henry, Gregory W. ^{[5
]}

Williamson, Michael H. ^{[5
]}

机构：

[1] CALTECH, NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA

[2] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

[3] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

[4] Cumbres Observ Global Telescope, Goleta, CA 93117 USA

[5] Tennessee State Univ, Ctr Excellence Informat Syst, Nashville, TN 37209 USA

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 692卷 / 01期

关键词：

planetary systems; stars:; low-mass; brown dwarfs; HOBBY-EBERLY TELESCOPE; BROWN-DWARF; PLANET; SPECTROGRAPH; PHOTOMETRY; SYSTEM;

D O I：

10.1088/0004-637X/692/1/290

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Brown dwarfs and low-mass stellar companions are interesting objects to study since they occupy the mass region between deuterium and hydrogen burning. We report here the serendipitous discovery of a low-mass companion in an eccentric orbit around a solar-type main-sequence star. The stellar primary, TYC 2534-698-1, is a G2V star that was monitored both spectroscopically and photometrically over the course of several months. Radial velocity observations indicate a minimum mass of 0.037 M(circle dot) and an orbital period of similar to 103 days for the companion. Photometry outside of the transit window shows the star to be stable to within similar to 6 millimags. The semimajor axis of the orbit places the companion in the "brown dwarf desert" and we discuss potential follow-up observations that could constrain the mass of the companion.

引用

页码：290 / 297

页数：8

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