Statistics – Computation
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..353m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. 353-383.
Statistics
Computation
29
Astronomical Models, Computational Astrophysics, Cosmology, Galactic Evolution, Many Body Problem, Cluster Analysis, Dark Matter, Galactic Clusters, Mathematical Models, Universe
Scientific paper
The effects of positive Lambda on the origin and evolution of large-scale structures in a Friedmann cosmological model are investigated theoretically, by means of numerical simulations based on the particle-particle/particle-mesh approach of Davis et al. (1985). The initial conditions are designed to reproduce the linear-growth mode of a cold-dark-matter fluctuation spectrum, and physical factors related to the density and density contrast around particles are used to implement biased galaxy formation. The results are presented in extensive graphs and diagrams and characterized in detail. It is found that all of the simulations, regardless of the value of Lambda, lead rapidly to the formation of clusters of galaxies, connected by bridges and separated by large areas of low density. The only values sensitive to Lambda are the galaxy formation rate and the angular momentum built up in clusters due to merging.
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