Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...400..398b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 400, no. 2, p. 398-409.
Astronomy and Astrophysics
Astrophysics
9
Dark Matter, Data Correlation, Galactic Clusters, Galactic Mass, Many Body Problem, Data Simulation, Galactic Evolution, Halos, Spatial Distribution
Scientific paper
High-resolution N-body simulations are used to determine the two-point spatial correlation function, xi(r), of dark galaxy halos in a cold dark matter universe as a function of halo mass and local environment. Compared to a fiducial correlation function computed without regard to environmental effects, xi(r) for halos in high-density regions is flatter than the fiducial correlation function, xi(r) for halos in average-density regions is similar to the fiducial correlation function, and xi(r) for halos in lower-density regions has a lower amplitude and is steeper than the fiducial correlation function. The fiducial correlation function of halos of overdensity of about 2000 is completely dominated by halos in high-density regions, and for halos of overdensities of about 200 and about 70 the fiducial correlation function is dominated by halos in high-density regions, but there is a contribution from halos in average-density regions.
Brainerd Tereasa G.
Villumsen Jens Verner
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