UBVRI CCD photometry of the old open cluster NGC 6253

Abstract

We present UBVRI photometry for the old open cluster NGC 6253. From comparison of the observed colour-magnitude diagrams with simulations based on stellar evolutionary models we derive in a self consistent way reddening, distance, and age of the cluster: E(B-V) = 0.23-0.32, (m-M)${}_0$ = 10.9$\pm$0.1, metallicity roughly double than solar, and age $\simeq$ 3 Gyr. The cluster has a binary sequence, discernible even through the field contamination, suggesting that about 1/3 of the cluster members belong to binary, or multiple, systems.

13 pages, plain LaTeX, uses mn.sty, 12 .ps figures, also available at http://www.bo.astro.it/bap/BAPhome.html or from ftp://boas3.bo.astro.it/bap/files/ (files bap96-31-fig*.ps) -- to be published by MNRAS (revised addresses for figures)

Cited by in corpus (18)

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• vbyCaHbeta CCD Photometry of Clusters. VIII. The Super-Metal Rich, Old Open Cluster NGC 6791
• Element abundances in the metal rich open cluster NGC6253
• uvbyCaHbeta CCD Photometry of Clusters. III. The Most Metal-Rich Open Cluster, NGC 6253
• C, N, O abundances and carbon isotope ratios in evolved stars of the open clusters Collinder 261 and NGC 6253
• BVI photometry of the very old open cluster Berkeley 17
• WIYN Open Cluster Study. XXXIX. Abundances in NGC 6253 from HYDRA Spectroscopy of the Li 6708 A Region
• The Old, Super-Metal-Rich Open Cluster, NGC 6791 - Elemental Abundances in Turn-off Stars from Keck/HIRES Spectra
• The intermediate age open cluster NGC 2660
• Rotational and Radial Velocities of 1.3-2.2 M_Sun Red Giants in Open Clusters
• BVRIJHK photometry and proper motion analysis of NGC 6253 and the surrounding field
• The first search for variable stars in the open cluster NGC 6253 and its surrounding field
• VLT multi-epoch radial velocity survey toward NGC 6253. Analysis of three transiting planetary candidates
• Pismis 2, a poorly studied, intermediate age open cluster
• Old Open Clusters as Tracers of Galactic Evolution
• An extensive radial velocity survey toward NGC 6253