Other
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.208..493b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 208, June 1, 1984, p. 493-509.
Other
103
Galactic Evolution, Globular Clusters, Gravitational Collapse, Stellar Oscillations, Astronomical Models, Star Distribution, Stellar Models, Thermal Energy
Scientific paper
In the present gaseous model for the postcollapse evolution of globular clusters, the existence of a gravothermally unstable isothermal configuration with a central singularity of definite functional form is demonstrated, and the evolution towards such a configuration is computed numerically, taking energy release through the hardening of binary stars into account. The configuration is found to be approached by the cluster in an oscillatory rather than monotonic fashion. The core oscillates between high density cusp and moderate central density isothermal core states. Only a minute energy input is needed to drive this gravothermal oscillation, thereby resolving the question as to how the nonexistence of the collapsed globular cluster can be reconciled with the theoretical prediction of the central singularity.
Bettwieser E.
Sugimoto Daiichiro
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