Galactic open clusters provide an abundant sample of stellar aggregates of various sizes, ages and metal abundances, apt to constitute a template for comparison with star systems in other galaxies. In this paper we present and discuss a standard methodology to synthesize U,B,V fluxes and colours, and apply it to a set of 138 open clusters. Results are compared with previous ones available in the literature. We were able to calibrate a mass-luminosity relation by which we evaluated the mass of ~400 open clusters, leading to a well defined present-day mass function. The number-complete sample of galactic open clusters presented in Battinelli & Capuzzo-Dolcetta (1991) is enlarged of a 15%.
Astronomy and Astrophysics Supplement Series
- Pub Date:
- May 1994
- CLUSTERS: OPEN AND ASSOCIATIONS;
- TECHNIQUES: PHOTOMETRIC;
- 8 pages + 2 tables, 13 figures (available on request), Tex in Astron. Astrophys. Suppl. format