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2003MNRAS.343.1263N - Mon. Not. R. Astron. Soc., 343, 1263-1270 (2003/August-3)
An optical and near-infrared search for brown dwarfs in the Pleiades cluster.
NAGASHIMA C., DOBBIE P.D., NAGAYAMA T., NAKAJIMA Y., NAGATA T., TAMURA M., NAKAJIMA T., SUGITANI K., NAKAYA H., HODGKIN S.T., PICKLES A.J. and SATO S.
Abstract (from CDS):
We have carried out a brown dwarf search over an area of 14x23arcmin2 near the central portion of the Pleiades open cluster in five optical and near-infrared bands (i ', Z, J, H, Ks) with 10σ detection limits of i '∼ 22.0, J ∼ 20.0 and Ks ∼ 18.5 mag. The surveyed area has large extinction in excess of AV= 3 in the Pleiades region. We detected four new brown dwarf candidates from the colour-colour (J -K, i '-J) and the colour-magnitude (J, i '-K) diagrams. We estimated their masses as 0.046 M☉down to 0.028 M☉. The least massive one is estimated to have a mass smaller than Roque25 or int-pl-IZ-69, and possibly the lowest-mass object found so far in the Pleiades cluster.
Abstract Copyright: 2003 RAS
Journal keyword(s): stars: low-mass, brown dwarfs - open clusters and associations: individual: Pleiades - infrared: stars
Nomenclature: Tables 1, 2: Cl* Melotte 22 NPN CNN (Nos C1-C11). Table 1: Cl* Melotte 22 NPNPL N (Nos 1-4).
Simbad objects: 16
