The Ω0 Dependence of the Evolution of ξ(r)

The evolution of the two-point correlation function, ξ(r, z), and the pairwise velocity dispersion, σ(r, z), for both the matter, ξρρ, and halo population, ξhh, in three different cosmological models, (Ω0, λ0) = (1, 0), (0.2, 0), and (0.2, 0.8), are described. If the evolution of ξ is parameterized by ξ(r, z) = (1 + z)-(3+ϵ)ξ(r, 0), where ξ(r, 0) = (r/r0)-γ, then ϵρρ ranges from 1.04 ± 0.09 for (1, 0) and 0.18 ± 0.12 for (0.2, 0), as measured …