The Young Open Cluster NGC 2129

Abstract

The first CCD UBV(RI) photometric study in the area of the doubtful open cluster NGC 2129 is presented. Photometry of a field offset 15 arcmin northward is also provided, to probe the Galactic disk population toward the cluster. Using star counts, proper motions from the UCAC2 catalog, 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 toward its direction. Updated estimates of the cluster fundamental parameters are provided. The mean reddening is found to be E(B-V)=0.80$\pm$0.08 and the distance modulus is $(m-M{)}_o$= 11.70$\pm 0.30$. Hence, NGC 2129 is located at 2.2$\pm$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 million years. These stars are used to provide new estimates of the cluster absolute proper motion components.

8 pages, 11 figures, in press in MNRAS

References in corpus (7)

• New catalogue of optically visible open clusters and candidates
• The second US Naval Observatory CCD Astrograph Catalog (UCAC2)
• Star clusterings in the Carina complex: UBVRI photometry of Bochum 9, 10 and 11
• Pre-FLAMES Survey: Observations of Selected Stellar Fields
• Luminosity and mass functions of galactic open clusters: II. NGC 4852
• A photometric investigation of the young open cluster Trumpler 15
• A photometric study of the young open cluster NGC 1220

Cited by in corpus (3)

• Spiral structure in the outer Galactic disk. I. The Third Galactic Quadrant
• Identifying birth places of young isolated neutron stars
• New Evidence Supporting Cluster Membership for the Keystone Calibrator Delta Cephei