Post-collapse evolution of globular clusters with stochastic energy sources

Details Post-collapse evolution of globular clusters with stochastic energy sources Post-collapse evolution of globular clusters with stochastic energy sources

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..589t&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 4, 1991, p. 589-606. Research supported by Yamada Sci

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Energy Sources, Globular Clusters, Gravitational Collapse, Stellar Evolution, Stochastic Processes, Computational Astrophysics, Fokker-Planck Equation, Thermal Instability

Scientific paper

The effects of the stochasticity of binary activity on the post-collapse evolution of globular clusters are investigated by directly integrating the Fokker-Planck equation. By comparing the present results of computations with those of continuous energy sources, it is found that the stochasticity of binary activity makes core evolution more unstable. For example, a cluster with N = 10,000 stars experiences chaotic gravothermal oscillations in the case of stochastic energy sources, whereas one with continuous energy sources exhibits regular oscillations. The stochasticity, however, does not have much influence on the overall features of gravothermal oscillations for clusters with large N.

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