Title:

A Galaxy-Halo Model of Large-Scale Structure



Mark Neyrinck
University of Colorado




Abstract:

I will talk about a new "galaxy-halo" model of large-scale
structure, in which the galaxies entering a given sample are the
fundamental objects.  Haloes attach to galaxies, in contrast to
the standard halo model, in which galaxies attach to haloes.
With surprisingly little input, an intuition-aiding
approximation to the galaxy-matter cross-correlation coefficient
R(k) emerges, in terms of the halo mass dispersion.  This is
especially relevant given the recent advances in precision in
measurements of the galaxy-matter correlation function from weak
gravitational lensing.  The galaxy-halo model also addresses the
issue of interpreting the galaxy-matter correlation function as
an average halo density profile, and provides a simple
description of galaxy bias as a function of scale.