Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978azh....55...27d&link_type=abstract
Astronomicheskii Zhurnal, vol. 55, no. 1, 1978, p. 27-36. In Russian.
Astronomy and Astrophysics
Astronomy
7
Binary Stars, Gravitational Effects, Star Clusters, Stellar Evolution, Black Holes (Astronomy), Energy Transfer, Galactic Nuclei, Kinetic Energy, Milky Way Galaxy, Stellar Systems, Tides
Scientific paper
In star clusters, the formation of 'strong' pairs (i.e., pairs with binding energy greater than the mean kinetic energy of a cluster star) can strongly influence evolution of the system. It is shown that if at the final stages of secular contraction of the cluster core the number of strong pairs is comparable to the total number of stars, the exchange of energy between these pairs and cluster stars can lead to reversal of the contraction process and to expansion of the cluster. The formation of the required number of pairs in systems with many stars proceeds most efficiently via binary encounters of stars with tidal effects playing a role. The new features in the evolution of a stellar system acquired under the influence of strong pairs suggest the possibility of avoiding collapse of the cluster core and formation of a massive black hole in the center.
Dokuchaev Viacheslav I.
Ozernoi L. M.
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