Entropy and galaxy clustering

Details Entropy and galaxy clustering Entropy and galaxy clustering

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326...77k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 1, 1988, p. 77-83. NSF-supported research.

Statistics

Computation

2

Computational Astrophysics, Entropy, Galactic Clusters, Particle Motion, Correlation, Distribution Functions

Scientific paper

The notion of a 'p-particle entropy' Sp introduced by Kandrup (1987) is applied here to a Newtonian cosmology modeled as an expanding system of identical point masses studying the time dependence of S1 and S2 in the framework of the linearized theory considered by Fall and Saslaw (1976). It is found that if, at some initial time t0, the galaxy-galaxy correlation function vanished, then S1(t0) = S2(t0). At least for short times t - t0 thereafter, S1 and Delta S = S1 - S2 increase on a characteristic time scale. For all times t after t0, S1(t) = S2(t) or greater.

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