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Article
Report number	astro-ph/9905162
Title	EROS 2 proper motion survey : a field brown dwarf and an L dwarf companion to LHS 102
Author(s)	Goldman, B ; Delfosse, X ; Forveille, T ; Afonso, C ; Alard, C ; Albert, J N ; Andersen, J ; Ansari, R ; Aubourg, E ; Bareyre, P ; Bauer, F ; Beaulieu, J P ; Borsenberger, J ; Bouquet, A ; Char, S ; Charlot, X ; Couchot, F ; Coutures, C ; Derue, F ; Ferlet, R ; Fouqué, P ; Glicenstein, J F ; Gould, A ; Graff, D S ; Gros, M H ; Haïssinski, J ; Hamilton, J C ; Hardin, D P ; De Kat, J ; Kim, A ; Lasserre, T ; Lesquoy, E ; Loup, C ; Magneville, C ; Mansoux, B ; Marquette, J B ; Martín, E L ; Maurice, E ; Milshtein, A I ; Moniez, M ; Palanque-Delabrouille, Nathalie ; Perdereau, O ; Prévôt, L ; Regnault, N ; Rich, J ; Spiro, Michel ; Vidal-Madjar, A ; Virgoux, L ; Zylberajch, S
Publication	1999
In:	Astron. Astrophys.
Subject category	Astrophysics and Astronomy
Accelerator/Facility, Experiment	EROS
Abstract	We report the discovery of two L dwarfs (the new spectral class defined for dwarfs cooler than the M type) in a two-epoch CCD proper motion survey of 413 square degrees, complemented by infrared photometry from DENIS. One of them has a strong lithium line and is therefore a brown dwarf. The other is a common proper motion companion to the mid-M dwarf LHS 102 (GJ 1001), which has a well determined trigonometric parallax. LHS 102B is thus the coolest L dwarf of known distance and luminosity. Its infrared absolute photometry are very well reproduced by the Allard et al DUSTY models.

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