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arXiv · 0812.4094

HD 91669b: A New Brown Dwarf Candidate from the McDonald Observatory Planet Search

Robert A. Wittenmyer·Michael Endl·William D. Cochran·Ivan Ramirez·Sabine Reffert·Phillip J. MacQueen·Matthew Shetrone
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Abstract

We report the detection of a candidate brown dwarf orbiting the metal-rich K dwarf HD 91669, based on radial-velocity data from the McDonald Observatory Planet Search. HD 91669b is a substellar object in an eccentric orbit (e=0.45) at a separation of 1.2 AU. The minimum mass of 30.6 Jupiter masses places this object firmly within the brown dwarf desert for inclinations i>23 degrees. This is the second rare close-in brown dwarf candidate discovered by the McDonald planet search program.

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Robert A. Wittenmyer, Michael Endl, William D. Cochran, Ivan Ramirez, Sabine Reffert, Phillip J. MacQueen, Matthew Shetrone. 2008-12-22. HD 91669b: A New Brown Dwarf Candidate from the McDonald Observatory Planet Search. https://doi.org/10.1088/0004-6256%2F137%2F3%2F3529

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