Integrated magnitudes and colors of open clusters

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Open Clusters, Stellar Color, Stellar Evolution, Stellar Magnitude, Ubv Spectra, Asymptotic Properties, Stellar Luminosity, Stellar Mass, Stellar Models

Scientific paper

The integrated UBV characteristics of 50 galactic clusters, computed for the clusters' physical members only (segregated on the basis of the proper motions or radial velocities) are discussed. On the basis of a comparison between the empirically-obtained dependences and their theoretical counterparts (Searle et al., 1973) a suggestion has been made that the number of the massive stars (with masses greater than 10 solar mass) in the initial mass function must be considerably greater. Evolutionary effects on integrated parameters and their dependences have been discussed. An attempt at an evolutionary interpretation of the integrated luminosity function for galactic clusters, obtained by Starikova (1962) in the light of the self-obtained dependences has been made.

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