An analysis is conducted of the escape rate of stars from model clusters vs concentration and global mass function, together with a detailed calculation of the number of escaping stars for the model cluster in a way that accumulates the escapes from progressively larger radii. The fractional escape rate from multimass clusters is a strong function of the lower mass cutoff. Attention is given to the escape rates for the Galactic globular clusters M4, M5, M68, NGC 6752, and 47 Tuc.
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Doug Johnstone (1993) studied this question.