Other
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205..733m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Nov. 1983, p. 733-745.
Other
45
Binary Stars, Gravitational Collapse, Kinetic Heating, Star Clusters, Stellar Mass Ejection, Stellar Systems, Stellar Temperature, Collisions, Galactic Evolution, Globular Clusters, Gravitational Effects, Stellar Motions
Scientific paper
Results from numerical integrations of random binary-binary encounters have been used to study the heating and mass loss of dense stellar systems by binary collisions. The obtained distributions and cross-sections have been used to simulate binary collisions in a system with nearly Maxwellian velocity distribution. The loss of kinetic energy and mass by escape of reaction results was taken into account and thus a realistic estimate for the effect of these interactions was obtained. These results confirm the earlier estimates by other authors that in equal mass systems binaries must be rather numerous in order to be dynamically important. However, it is demonstrated that with increasing binary masses the importance of binary-binary reactions grows rapidly. A simple comparison of the heating rates due to binary-single star and binary-binary encounters shows that typically these are comparable or the latter dominates. It is concluded that collisions between binaries may contribute much to the dynamics of dense stellar systems provided the binaries are suitably massive.
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