Open AccessA comparison of simulated and analytic major merger counts
Author(s) -
Cohn J.D.,
Bagla J.S.,
White Martin
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04509.x
Subject(s) - physics , halo , dark matter , galaxy , astrophysics , dark matter halo , cluster analysis , range (aeronautics) , galaxy formation and evolution , astronomy , statistical physics , statistics , materials science , mathematics , composite material
We use large volume, high resolution, N ‐body simulations of three different ΛCDM models, with different clustering strengths, to generate dark‐matter halo merging histories. Over the reliable range of halo masses, roughly galaxy groups to rich clusters of galaxies, we quantify the number density of major mergers for two different time intervals and compare them with analytic predictions based on the extended Press–Schechter theory.