Statistics – Computation
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...370..567g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 370, April 1, 1991, p. 567-582.
Statistics
Computation
124
Binary Stars, Fokker-Planck Equation, Globular Clusters, Gravitational Collapse, Stellar Motions, Astronomical Models, Computational Astrophysics, Computer Programs, Stellar Cores
Scientific paper
The importance of primordial binaries for the dynamical evolution of isolated star clusters is studied, emphasizing developments after core collapse. Fokker-Planck methods are used to represent the distribution of binary and single-star translational energies accurately and with the minimum of numerical noise while the central density of the cluster varies over several orders of magnitude. Mass stratification and modest core contraction occur first, followed by a period during which the core radius is nearly constant, and then by gravothermal oscillations. Even a large initial binary population cannot prevent initial contraction of the core radius with respect to the half-mass radius if the initial model has low concentration. On the other hand primordial binaries can support the core against further collapse for many half-mass relaxation times.
Cohn Haldan
Gao Bin
Goodman Jeremy
Murphy Brian
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