Bibcode
Lodieu, N.; Scholz, R.-D.; McCaughrean, M. J.
Referencia bibliográfica
Astronomy and Astrophysics, v.389, p.L20-L23 (2002)
Fecha de publicación:
7
2002
Revista
Número de citas
28
Número de citas referidas
28
Descripción
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).