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A unified N-body and statistical treatment of stellar dynamics. I - The hybrid code.
McMillan, S. L. W.; Lightman, A. P.
AA(Illinois, University, Urbana, IL), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 15, 1984, p. 801-824. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Celestial Mechanics, Globular Clusters, Gravitational Collapse, Many Body Problem, Stellar Evolution, Stellar Motions, Binary Stars, Computerized Simulation, Distribution Functions, Fokker-Planck Equation, Orbit Perturbation, Star Distribution
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A unified N-body and statistical treatment of stellar dynamics is developed and applied to the late stages of core collapse and early stages of post collapse evolution in globular clusters. A 'hybrid' computer code is joined to a direct N-body code which is used to calculate exactly the behavior of particles in the inner spatial region, and the combination is used to follow particles statistically in the outer spatial region. A transition zone allows the exchange of particles and energy between the two regions. The main application results include: formation of a hard central binary system, reversal of core collapse and expansion due to the heat input from this binary, ejection of the binary from the core, and recollapse of the core; density profiles that form a one-parameter sequence during the core oscillations; and indications that these oscillations will eventually cease.

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arXiv e-prints