Discovery of three nearby L dwarfs in the Southern Sky

Details Discovery of three nearby L dwarfs in the Southern Sky Discovery of three nearby L dwarfs in the Southern Sky

2002-05-07

arxiv.org/abs/astro-ph/0205098v1

Astronomy and Astrophysics

Astrophysics

4 pages including 2 figures, accepted for publication in Astronomy and Astrophysics Letters

Scientific paper

10.1051/0004-6361:20020698

We report the discovery of three L dwarfs in the solar vicinity within 30 parsecs. These objects were originally found as proper motion objects from a combination of R and I photographic plates measured as part of the SuperCOSMOS Sky Surveys. We subsequently identified these objects as bona fide brown dwarf candidates on the basis of their R-I colour, as first criterion, and subsequently their J-K colours when the infrared data were available from the 2MASS database. Spectroscopic observations in the optical with the ESO 3.6m/EFOSC2 and in the near-infrared with the NTT/SOFI led to the classification of their spectral types as early L dwarfs.

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