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, Thirupathi Sivarani, Gregory W. Henry, Michael H. Williamson

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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 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.

Original languageEnglish (US)
Pages (from-to)290-297
Number of pages8
JournalAstrophysical Journal
Issue number1
StatePublished - Feb 10 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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