Statistics – Computation
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.122..299s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 122, no. 2, May 1986, p. 299-325.
Statistics
Computation
20
Computational Astrophysics, Evolution (Development), Gravitational Fields, One Dimensional Flow, Relaxation Method (Mathematics), Astronomical Models, Density Distribution, Two Phase Flow
Scientific paper
A series of numerical experiments on nonuniform one-dimensional gravitational systems have been performed with the aim of testing the conflicting models of violent relaxation, developed by Lynden-Bell and by Shu. It is shown that the phase fluid model of Lynden-Bell ceases to apply to the particle systems investigated already at the end of the virialization phase. From then on the particle nature of the system dominates its evolution: a very efficient mixing process, driven by the mean field fluctuations, washes out all memory of the initial phase densities. During this collisionless mixing process and in the absence of formation of structure, the system evolves towards a configuration characterized by a single temperature per unit mass in accordance with the Shu model of violet relaxation.
Luwel Marc
Severne George
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