New fundamental parameters of the Galactic open clusters Berkeley 26, Czernik 27, Melotte 72, NGC2479 and BH37

PIATTI, A.E.; CLARIA, J.J.; 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 UBVIKC photometry down to V ~ 21.0 for the open clusters Berkeley26, Czernik27, Melotte72, NGC2479 and BH37. 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 Berkeley26, Melotte72 and NGC2479. 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 colour-magnitude diagrams. In the case of NGC2479, 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 to the colour-colour and colour-magnitude diagrams, respectively.