Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 91

Author(s): Wielen, R.
Title: Dynamics of Star Clusters: Comparison of Theory with Observations and Simulations
Source: In: Dynamics of Stellar Systems, Proc. IAU Symp. 69, Besancon, France, 9-13 September 1974; A. Hayli (ed.), Reidel, Dordrecht, p. 119-131
Year: 1975
Abstract: Stellar dynamical theories for collisional systems are tested by numerical N-body simulations of isolated star clusters with N up to 500. For the dynamical evolution of the density distribution in star clusters, good agreement is found between Monte Carlo results and N-body models. There remains a discrepancy between theory and simulations in the rate of stellar escape from clusters and/or in the mechanism by which escapers are produced. Simulations of non-isolated star clusters are compared with observations of open clusters. The observed age distribution of open clusters can be explained by the dynamical dissolution of clusters. Stars of low mass do not escape relatively more frequently than stars of average mass
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