Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.201..401w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 201, Nov. 1982, p. 401-414. Research supported by the University of Cal
Astronomy and Astrophysics
Astronomy
14
Astronomical Models, Galactic Clusters, Gravitation Theory, Universe, Correlation, Dark Matter, Halos, Hierarchies, Many Body Problem
Scientific paper
Numerical models are developed to examine the gravitational evolution of scale-free clustering among galaxies during the formation of the Universe. N-body simulations of hierarchical models are employed to simulate the correlations in the thus-far observed galaxy distribution. Nonlinear dynamical effects are determined to break spatial self-similarity on all scales dense enough to have undergone more than one or two internal orbital periods since the Universe began. Temporal self-similarity is determined to be possible, however, in the formation of core-halo structures. It is suggested that invisible matter, thought to be the major component by mass in galactic halos and groups and clusters of galaxies, has been dissipationless since a early epoch, and has grown in a self-similar manner. It is expected that galaxies will lose their halos to the distribution of dark matter as groups form and evolve to dynamic equilibrium.
Negroponte J.
White Simon D. M.
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