Optical photometric study of the open clusters Koposov 12, Koposov 53 and Koposov 77

Yadav, R. K. S. ; Glushkhova, E. V. ; Sariya, Devesh Path ; Porokhova, A. V. ; Kumar, Brijesh ; Ram Sagar, (2011) Optical photometric study of the open clusters Koposov 12, Koposov 53 and Koposov 77 Monthly Notices of the Royal Astronomical Society, 414 (1). pp. 652-658. ISSN 0035-8711

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-...

Related URL: http://dx.doi.org/10.1111/j.1365-2966.2011.18430.x

Abstract

We present UBVI CCD photometry in the region of the open clusters Koposov 12, Koposov 53 and Koposov 77. The optical CCD data for these clusters are obtained for the first time. The radii are found to be 4.6, 4.2 and 2.4 arcmin. The reddenings E(B-V) are 0.51 ± 0.05, 0.41 ± 0.05 and 0.56 ± 0.05 mag for Koposov 12, Koposov 53 and Koposov 77, respectively, while the corresponding distances are 2.0 ± 0.2, 5.3 ± 0.5 and 5.4 ± 0.5 kpc. Comparison with Z= 0.008 isochrones leads to an age of 0.6 ± 0.2 Gyr for Koposov 12. Ages of 89 ± 10 Myr for Koposov 53 and 1.2 ± 0.3 Gyr for Koposov 77 are determined using the isochrones of Z= 0.019. Our analysis shows that the reddening law is normal towards the clusters under study.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Stars: Evolution; Stars: Hertzsprung-Russell and Colour-magnitude Diagrams; Open Clusters and Associations: Individual: Koposov 12; Open Clusters and Associations: Individual: Koposov 53; Open Clusters and Associations: Individual: Koposov 77; Galaxies: Star Clusters: General
ID Code:65266
Deposited On:17 Oct 2011 03:44
Last Modified:17 Oct 2011 03:44

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