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Title:
Previrialization
Authors:
Evrard, August E.; Crone, Mary M.
Affiliation:
AA(Michigan, University, Ann Arbor), AB(Michigan, University, Ann Arbor)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 394, no. 1, July 20, 1992, p. L1-L4. Research supported by Regents Crane Fellowship. (ApJL Homepage)
Publication Date:
07/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMOLOGY, GALACTIC CLUSTERS, GRAVITATIONAL COLLAPSE, MANY BODY PROBLEM, MASS DISTRIBUTION, CELESTIAL MECHANICS, DENSITY DISTRIBUTION, GALACTIC EVOLUTION
DOI:
10.1086/186458
Bibliographic Code:
1992ApJ...394L...1E

Abstract

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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