Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21331404r&link_type=abstract
American Astronomical Society, AAS Meeting #213, #314.04; Bulletin of the American Astronomical Society, Vol. 41, p.291
Astronomy and Astrophysics
Astronomy
Scientific paper
We have searched for red, high proper-motion objects in a cross-match of the Sloan Digital Sky Survey and Two Micron All Sky Survey, with the goal of identifying wide ultracool binaries and previously missed brown dwarfs. We have found 21 binary candidates with at least one very low mass or brown dwarf component, and over 50 new L and T dwarf candidates. We present follow-up spectroscopy, obtained with SpeX at IRTF, of confirmed binaries and T dwarfs. Among these is G 203-50B, a wide, unusually blue L5 companion to a nearby low-mass star, and the widest ultracool binary yet discovered with a separation > 6000 AU.
Doyon Rene
Jayawardhana Ray
Lafreniere David
Radigan Jacqueline
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