Other
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..664c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. 664-676. NSERC-supported research.
Other
23
Astronomical Models, Cosmology, Dark Matter, Galactic Clusters, Many Body Problem, Autocorrelation, Galactic Evolution, Galactic Structure, Star Formation
Scientific paper
The formation of galaxies and their clustering is studied with an N-body experiment altered to include gas along with collisionless dark matter. The gas is isothermal, and resists only shallow potential wells, that is, it has a "minimal" physical biasing for galaxy formation. The background cosmology has a local Ω > 1 and the particles are perturbed with a spectrum of waves having P(k) ∝ k-1. About one-fourth of the particles form into galaxies. The main conclusion from these experiments is that even though neighboring galaxies only weakly prejudice the isothermal gas toward preferred sites of galaxy formation, the galaxies are much more strongly clustered than the underlying dark matter, up to 10 times in the ratio of the autocorrelation functions.
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