Mean field fluctuations and the evolution of self-gravitating systems

Details Mean field fluctuations and the evolution of self-gravitating systems Mean field fluctuations and the evolution of self-gravitating systems

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.126..177k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 126, no. 1, Oct. 1986, p. 177-184. Research supported by the University of

Statistics

Computation

6

Fluctuation Theory, Stellar Evolution, Boltzmann Transport Equation, Computational Astrophysics, Globular Clusters, Mass Distribution

Scientific paper

This paper considers the nonlinear effects of collective fluctuations about a slowly-varying solution of the "collisionless Boltzmann" equation appropriate for a system of stars with a distribution of masses. It is argued that these effects should be manifest on a time-scale tM intermediate between the violent and collisional relaxation times, inhibiting the natural progression towards equipartition induced by collisions, and favouring instead a "well-mixed" state, realized in numerical simulations, in which the mean square velocity is independent of the mass.

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