A Comparison of Simulated and Analytic Dark Matter Halo Major Merger Counts

Details A Comparison of Simulated and Analytic Dark Matter Halo Major Merger Counts A Comparison of Simulated and Analytic Dark Matter Halo Major Merger Counts

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.1704c&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #17.04; Bulletin of the American Astronomical Society, Vol. 32, p.1432

Astronomy and Astrophysics

Astronomy

Scientific paper

Major mergers, as compared to accretion, can significantly disrupt the state of the resulting system. This can either be a source of noise (e.g. a mass temperature relation for galaxy clusters) or a source of signal (for instance a trigger for star formation). We focus on major merger counts, that is, mergers which have occurred within a certain recent time interval, as a function of mass and era, for dark matter halos from about 1013 h-1 Msun to 1015 h-1 Msun. At these scales, N-body (gravity only) simulations can be expect to be reliable. We use TREEPM N-body simulations to calculate these counts, and compare with predictions we derived using (extended) Press-Schechter theory.

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