The intermediate-age open clusters Ruprecht 61, Czernik 32, NGC 2225 and NGC 2262

Details The intermediate-age open clusters Ruprecht 61, Czernik 32, NGC 2225 and NGC 2262 The intermediate-age open clusters Ruprecht 61, Czernik 32, NGC 2225 and NGC 2262

2005-06-24

arxiv.org/abs/astro-ph/0506594v1

Mon.Not.Roy.Astron.Soc.362:649-656,2005

Astronomy and Astrophysics

Astrophysics

10 pages, 14 figures, in press in MNRAS

Scientific paper

10.1111/j.1365-2966.2005.09340.x

We present the first $BVI$ CCD photometry to $V=22.0$ of 4 fields centered on the region of the southern Galactic star clusters Ruprecht~61, Czernik~32, NGC 2225 and NGC 2262 and of 4 displaced control fields. These clusters were never studied before, and we provide for the first time estimates of their fundamental parameters, namely radial extent, age, distance and reddening. We find that the four clusters are all of intermediate age (around 1 Gyr), close to the Sun and possess lower than solar metal abundance.

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