Previrialization

Details Previrialization Previrialization

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365...27p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 27-36. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

48

Astronomical Models, Dark Matter, Galactic Clusters, Gravitational Collapse, Mass Distribution, Virial Theorem, Many Body Problem, Perturbation Theory, Spiral Galaxies

Scientific paper

The relation between the virialized mass concentrations produced in a hierarchical gravitational instability picture and the amplitude of the primeval mass fluctuations is estimated. The analysis starts from an explicit construction of a developing protocluster and deduces the particle orbits that lead to the development of this system out of a homogeneous mass distribution. The solution yields a fairly direct measure of the primeval mass contrast and eliminates the possibility of unrealistic two-body relaxation during formation of the protocluster because early orbit crossing is suppressed.

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