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

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.

Accepted for publication in AJ

References in corpus (8)

• Detection Limits from the McDonald Observatory Planet Search Program
• Transiting exoplanets from the CoRoT space mission VI. CoRoT-Exo-3b: The first secure inhabitant of the brown-dwarf desert
• Oxygen Abundances in Nearby Stars. Clues to the formation and evolution of the Galactic disk
• Constraints on Extrasolar Planet Populations from VLT NACO/SDI and MMT SDI and Direct Adaptive Optics Imaging Surveys: Giant Planets are Rare at Large Separations
• The Mass of the Candidate Exoplanet Companion to HD 33636 from Hubble Space Telescope Astrometry and High-Precision Radial Velocities
• Selection Functions in Doppler Planet Searches
• Fourteen New Companions from the Keck & Lick Radial Velocity Survey Including Five Brown Dwarf Candidates
• A probable close brown dwarf companion to GJ 1046 (M2.5V)

Cited by in corpus (5)

• Exploring the Brown Dwarf Desert: New Substellar Companions from the SDSS-III MARVELS Survey
• Discovery of a Low-Mass Companion to a Metal-Rich F Star with the MARVELS Pilot Project
• Exterior Companions to Hot Jupiters Orbiting Cool Stars are Coplanar
• An eccentric Brown Dwarf eclipsing an M dwarf
• Exploring the Brown Dwarf Desert with Precision Radial Velocities and Gaia DR3 Astrometric Orbits