Open AccessThe young open cluster NGC 2129
Author(s) -
Carraro Giovanni,
Chaboyer Brian,
Perencevich James
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09762.x
Subject(s) - physics , astrophysics , open cluster , distance modulus , proper motion , spiral galaxy , photometry (optics) , star cluster , stars , astronomy , globular cluster , population , cluster (spacecraft) , astrometry , sociology , demography , computer science , programming language
The first charge‐coupled device UBV ( RI ) C photometric study in the area of the doubtful open cluster NGC 2129 is presented. Photometry of a field offset 15 arcmin northwards is also provided, to probe the Galactic disc population towards the cluster. Using star counts, proper motions from the UCAC2 catalogue, colour–magnitude and colour–colour diagrams, we demonstrate that NGC 2129 is a young open cluster. The cluster radius is 2.5 arcmin, and across this region we find evidence of significant differential reddening, although the reddening law seems to be normal towards its direction. Updated estimates of the cluster fundamental parameters are provided. The mean reddening is found to be E ( B − V ) = 0.80 ± 0.08 and the distance modulus is ( m − M ) 0 = 11.70 ± 0.30 . Hence, NGC 2129 is located at 2.2 ± 0.2 kpc from the Sun inside the Local spiral arm. The age derived from 37 photometrically selected members is estimated to be approximately 10 Myr. These stars are used to provide new estimates of the cluster absolute proper‐motion components.