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UBVRI CCD photometry of the old open cluster NGC 6253 | | A. Bragaglia
; G. Tessicini
; M. Tosi
; G. Marconi
; U. Munari
; | | Date: |
26 Aug 1996 | | Subject: | astro-ph | | 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. | | Source: | arXiv, astro-ph/9608167 | | Services: | Forum | Review | PDF | Favorites | |
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