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Title:
Discovery of a Low-Mass Companion to the Solar-Type Star TYC 2534-698-1
Authors:
Kane, Stephen R.; Mahadevan, Suvrath; Cochran, William D.; Street, Rachel A.; Sivarani, Thirupathi; Henry, Gregory W.; Williamson, Michael H.
Affiliation:
AA(NASA Exoplanet Science Institute, Caltech, MS 100-22, 770 South Wilson Avenue, Pasadena, CA 91125, USA ), AB(Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611-2055, USA ), AC(Department of Astronomy, University of Texas, Austin, TX 78712, USA ), AD(Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA ), AE(Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611-2055, USA ), AF(Center of Excellence in Information System, Tennessee State University, 3500 John A. Merritt Blvd., Box 9501, Nashville, TN 37209, USA), AG(Center of Excellence in Information System, Tennessee State University, 3500 John A. Merritt Blvd., Box 9501, Nashville, TN 37209, USA)
Publication:
The Astrophysical Journal, Volume 692, Issue 1, pp. 290-297 (2009). (ApJ Homepage)
Publication Date:
02/2009
Origin:
IOP
ApJ Keywords:
planetary systems, stars: low-mass, brown dwarfs
DOI:
10.1088/0004-637X/692/1/290
Bibliographic Code:
2009ApJ...692..290K

Abstract

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 sun and an orbital period of ~103 days for the companion. Photometry outside of the transit window shows the star to be stable to within ~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.
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