SCYON Abstract

Received on June 21 2005

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

AuthorsG. Carraro(1), G. Baume(2), R. Vazquez(2), A. Moitinho(3), D. Geisler (4)
Affiliation(1) Uchile/Yale
(2) La Plata
(3) Lisboa
(4) Concepcion
Accepted byMonthly Notices of the Royal Astronomical Society
Contactgcarraro@das.uchile.cl
URLhttp://fr.arxiv.org/abs/astro-ph/0506594
Links

Abstract

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 three clusters are all of intermediate age (around 1 Gyr), close to the Sun and possess lower than solar metal abundance.