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Dynamics of Galactic Nuclei Containing Massive Remnant Stars

Published online by Cambridge University Press:  25 May 2016

H. M. Lee
H. M. Lee*
Affiliation:
Pusan University, Department of Earth Sciences, Pusan 609-735, Korea

Abstract

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We have examined the dynamical evolution of stellar system containing massive remnant stellar component. If individual mass of remnant stars is much heavier than that of normal stars which comprise most of the mass in the cluster, remnant stars quickly form a subsystem within the core of cluster of ordinary stars. The subsystem evolves on its own relaxation time scale which is very short. However, the post collapse expansion driven by the three-body binary heating becomes very slow because the expansion energy of the compact subcluster can be easily absorbed by surrounding cluster. The gravitational radiation can lead to the merger of binaries when binaries become very hard. A central seed black hole might form if repeated merger becomes very efficient. Otherwise, relatively stable two-component phase of central compact cluster of remnant stars surrounded by larger cluster of low mass stars would last for a long time.

Type
Galactic Connection and Environmental Effect
Information
Symposium - International Astronomical Union , Volume 174: Dynamical Evolution of Stars Clusters , 1996 , pp. 293 - 302
Copyright
Copyright © Kluwer 1996 

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