Physical Sciences and Mathematics Commons^™

Galaxy Clustering And Galaxy Bias In A Lambda Cdm Universe, Dh Weinberg, R Dave, N Katz, L Hernquist

Astronomy Department Faculty Publication Series

We investigate galaxy clustering and the correlations between galaxies and mass in the ΛCDM cosmological model (inflationary cold dark matter with Ω_m = 0.4, Ω_Λ = 0.6, h = 0.65, n = 0.95, and σ₈ = 0.8), using a large, smoothed particle hydrodynamics simulation (SPH; with 2 × 144³ particles in a 50 h^-1 Mpc cube). Simulated galaxies can be unambiguously identified as clumps of stars and cold gas a few kpc to a few tens of kpc across, residing in extended halos of hot gas and dark matter; the space density of the resolved …