Journal
ASTRONOMY & ASTROPHYSICS
Volume 403, Issue 3, Pages 929-936Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20030218
Keywords
stars : low mass, brown dwarfs; stars : late-type; stars : kinematics; stars : distances; infrared : stars; surveys
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We report the discovery of seven hitherto unknown L-dwarfs found as a result of a spectroscopic search for distant AGB stars. Their far-red and near-infrared colours are very similar to known dwarfs of the same spectral type. One new object is among the similar to30 brightest L-dwarfs, with K(s) = 12.12, and is nearby, similar to20 pc. Using low resolution spectroscopy from the Danish 1.54 m ESO telescope, spectral types in the range L0.5-L5 are derived for these seven L-dwarfs by direct comparison to L-type standards taken from Kirkpatrick et al. (1999). Distances are determined from existing calibrations, and together with measured proper motions, yield kinematics for the seven new dwarfs consistent with that expected for the solar neighbourhood disk population.
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