2003/05/10 by C. Nagashima, P. D. Dobbie, T. Nagayama +9 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2003.06766.x
published as Mon.Not.Roy.Astron.Soc. 343 (2003) 1263 · 9 pages, 7 figures, accepted for publication in MNRAS
arxiv created 2003/05/10 · openalex publication_date 2003/08/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have carried out a brown dwarf search over an area of 14 × 23 arcmin2 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.