Integrated Colour Synthesis of Population I Clusters
Abstract
Summary. Integrated (U - B)0 and (B - V)0 colours of Population I clusters have been derived from two sets of homogeneous evolutionary tracks in two different cases: a) clusters populous enough to approximate the mass distribution of stars by a continuous function, b) clusters with few evolved stars, in which stochastic fluctuations of mass distribution produce a large spread in colours of systems of the same age. In this latter case the colour distributions have been computed by a Monte Carlo method. The adopted mass distribution is derived from Salpeter's initial luminosity function. The results obtained have been discussed by analysing the influence of the late evolutionary stages of low mass stars. Comparison with experimental data of open clusters of our Galaxy and of globular-like clusters of the Large Magellanic Cloud have been also made. Key words: stellar evolution - cluster synthetic colours spread in colours - test of stellar evolution
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1977
- Bibcode:
- 1977A&A....54..243B