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Discovery of a Low-Mass Companion to the Solar-Type Star TYC 2534-698-1

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arxiv 0811.1053 v1 pith:4ZTKWECB submitted 2008-11-06 astro-ph

Discovery of a Low-Mass Companion to the Solar-Type Star TYC 2534-698-1

Stephen R. Kane , Suvrath Mahadevan , William D. Cochran , Rachel A. Street , Sivarani Thirupathi , Gregory W. Henry , Michael H. Williamson This is my paper
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keywords companionstarlow-massmassbrowndiscoveryobservationsorbit
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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_solar 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 semi-major 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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