Discovery of three nearby L dwarfs in the Southern Sky
Abstract
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 3.6 m/EFOSC2 and in the near-infrared with the NTT/SOFI led to the classification of their spectral types as early L dwarfs. Based on observations collected with the ESO 3.6 m/ EFOSC2 and the NTT/SOFI at the European Southern Observatory, La Silla, Chile (ESO programme 68.C-0664).
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 2002
- DOI:
- 10.1051/0004-6361:20020698
- arXiv:
- arXiv:astro-ph/0205098
- Bibcode:
- 2002A&A...389L..20L
- Keywords:
-
- surveys;
- stars: distances;
- stars: kinematics;
- stars: late-type;
- stars: low-mass;
- brown dwarfs;
- solar neighbourhood;
- Astrophysics
- E-Print:
- 4 pages including 2 figures, accepted for publication in Astronomy and Astrophysics Letters