Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389..453c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 389, April 20, 1992, p. 453-463. Research supported by NSERC.
Astronomy and Astrophysics
Astronomy
87
Cosmology, Dark Matter, Galactic Clusters, Galactic Evolution, Red Shift, Virial Theorem, Astronomical Models, Computerized Simulation, Infrared Astronomy Satellite, Universe
Scientific paper
Dissipationless numerical experiments are used here to investigate dynamical clustering in a low-bias cold dark matter universe. By pushing the model to the lower limit allowed by microwave background experiments, a part of parameter space is explored where nonlinear dyamical evolution is fundamental. The model produces a set of present-epoch galaxies with reliability statistical properties similar to those found in earlier gasdynamical schemes. On small scales the effect of merging is to maintain a power-law galaxy correlation close to that observed, despite a steeper density correlation. On large scales nonlinear revolution boosts the amplitude of the density correlation beyond the predictions of linear theory. Dynamical clustering of galaxies into regions with enhanced large-scale correlation leads to a further increase in the amplitude of the galaxy correlation on large scales. The resulting galaxy distribution is consistent with current clustering data.
Carlberg Ray G.
Couchman Hugh M. P.
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