Previrialization

Details Previrialization Previrialization

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394l...1e&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 394, no. 1, July 20, 1992, p. L1-L4. Research supported by Regent

Astronomy and Astrophysics

Astrophysics

30

Cosmology, Galactic Clusters, Gravitational Collapse, Many Body Problem, Mass Distribution, Celestial Mechanics, Density Distribution, Galactic Evolution

Scientific paper

The results of N-body experiments employing Gaussian random initial conditions designed to address the effect of previrialization recently examined by Peebles are reported. The central issue is whether the development of small-scale structure within a collapsing protocluster can significantly retard its collapse. A series of runs with progressively diminished small-scale power indicates that the collapse of objects is insensitive to the degree of clustering on small scales. It is concluded that previrialization does not have significant impact on the formation epoch of galaxies and clusters arising from gravitational clustering of initially Gaussian random density fields.

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