Halo Models of Large Scale Structure

Details Halo Models of Large Scale Structure Halo Models of Large Scale Structure

2002-06-28

arxiv.org/abs/astro-ph/0206508v1

Phys.Rept.372:1-129,2002

Astronomy and Astrophysics

Astrophysics

166 pages, 60 figures (low resolution in most color figures); Invited review article for Physics Reports (final version in pre

Scientific paper

10.1016/S0370-1573(02)00276-4

We review the formalism and applications of the halo-based description of nonlinear gravitational clustering. In this approach, all mass is associated with virialized dark matter halos; models of the number and spatial distribution of the halos, and the distribution of dark matter within each halo, are used to provide estimates of how the statistical properties of large scale density and velocity fields evolve as a result of nonlinear gravitational clustering. We first describe the model, and demonstrate its accuracy by comparing its predictions with exact results from numerical simulations of nonlinear gravitational clustering. We then present several astrophysical applications of the halo model: these include models of the spatial distribution of galaxies, the nonlinear velocity, momentum and pressure fields, descriptions of weak gravitational lensing, and estimates of secondary contributions to temperature fluctuations in the cosmic microwave background.

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