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

作者：Piatti Andres E^*; Claria Juan J; Ahumada Andrea V

来源：Monthly Notices of the Royal Astronomical Society, 2010, 402(4): 2720-2734.

DOI：10.1111/j.1365-2966.2009.16106.x

• techniques: photometric
• open clusters and associations: individual: Berkeley 26
• open clusters and associations: individual: Czernik 27
• open clusters and associations: individual: Melotte 72
• open clusters and associations: individual: NGC 2479
• open clusters and associations: individual: BH 37

We have obtained CCD UBVI(KC) photometry down to V similar to 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 colour-magnitude diagrams. 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 to the colour-colour and colour-magnitude diagrams, respectively.

• 出版日期2010-3