Discovery of three nearby L dwarfs in the Southern Sky

Free access article

Issue		A&A Volume 389, Number 1, July I 2002


Page(s)		L20 - L23
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:20020698

A&A 389, L20-L23 (2002)
DOI: 10.1051/0004-6361:20020698

Letter

Discovery of three nearby L dwarfs in the Southern Sky

N. Lodieu, R.-D. Scholz and M. J. McCaughrean

Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany

(Received 22 April 2002 / Accepted 7 May 2002)

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.

Key words: surveys -- stars: distances -- stars: kinematics -- stars: late-type -- stars: low-mass, brown dwarfs -- solar neighbourhood

Offprint request: N. Lodieu, nlodieu@aip.de

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