Discovery of three nearby L dwarfs in the Southern Sky

Lodieu, N.; Scholz, R.-D.; McCaughrean, M. J.
Bibliographical reference

Astronomy and Astrophysics, v.389, p.L20-L23 (2002)

Advertised on:
7
2002
Number of authors
3
IAC number of authors
0
Citations
28
Refereed citations
28
Description
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).