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Gravothermal Oscillations

Published online by Cambridge University Press:  04 August 2017

Erich Bettwieser
Erich Bettwieser*
Affiliation:
University Observatory Göttingen, Geismarlandstr. 11 3400 Göttingen Federal Republic of Germany

Abstract

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Stellardynamical systems are modelled by gaseous spheres. The properties of an isothermal equilibrium configuration with a central singularity are discussed in the context of post-collapse evolution. For the numerical calculations heating effects are taken into account. Evolution towards the equilibrium configuration is monotonically only if much energy is delivered from hardening processes of binary stars. Since the equilibrium configuration is gravo-thermally unstable a minute emission of energy is sufficient to turn gravothermal contraction into gravothermal expansion. In such case equilibrium is approached by oscillations of the core.

Type
May 30: Model System in the Point-Mass Approximation
Information
Symposium - International Astronomical Union , Volume 113: Dynamic of Stars Clusters , 1985 , pp. 219 - 230
Copyright
Copyright © Reidel 1985 

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