New fundamental parameters of the Galactic open clusters Berkeley\,26, Czernik\,27, Melotte\,72, NGC\,2479 and BH\,37

PIATTI, ANDRÉS E.; CLARIA OLMEDO, JUAN JOSÉ; AHUMADA, A.V.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2010 vol. 402 p. 2720 - 2734

0035-8711

We have obtained CCD $UBVI_{KC}$ photometry down to V $\sim$ 21.0 for the open clusters Berkeley\,26, Czernik\,27, Melotte\,72, NGC\,2479 and BH\,37. The latter has never been studied before. Cluster stellar density profiles were obtained from star counts in appropriate-sized boxes distributed throughout the entire observed fields. Based on different measured indices, we estimate the ages of Berkeley\,26,  Melotte\,72 and NGC\,2479. On the other hand, we indicate possible solutions for the cluster fundamental parameters by matching theoretical isochrones which reasonably reproduce the main cluster features in their CMDs. In the case of NGC\,2479, the cluster $E(B-V)$ and $E(V-I)$ colour excesses and apparent distance modulus were estimated from the fit of the Zero-Age Main Sequence (ZAMS) to the colour-colour and {\bf colour-magnitude} diagrams, respectively.