Statistics – Computation
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..837s&link_type=abstract
(Astronomicheskii Zhurnal, vol. 61, Sept.-Oct. 1984, p. 837-845) Soviet Astronomy (ISSN 0038-5301), vol. 28, Sept.-Oct. 1984, p.
Statistics
Computation
5
Galactic Clusters, Galactic Evolution, Galactic Structure, Computational Astrophysics, Correlation, Filaments, Spatial Distribution
Scientific paper
The formation mechanism of rich clusters of galaxies (RCOGs) is investigated theoretically by means of three-dimensional computer simulations using the dynamical model of Klypin and Shandarin (1983), with a focus on the third and final stage, in which the curvilinear filaments formed from the original pancakes produce compact clumps. The adiabatic-type fluctuations considered include those occurring in a neutrino-dominated universe. The general features of the model are reviewed; the process prior to RCOG formation is examined; and an expression for the RCOG correlation function is determined. In the scenario developed, RCOGs form in regions where the smallest of the three principal values of the deformation tensor for the initial fluctuations reaches a local maximum, permitting the estimation to within a factor of two of the number of RCOGs in existence as the cell structure becomes well developed. The possibility of cannibalism among RCOGs is discussed.
Klypin Anatoly
Shandarin Sergei F.
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