Quasar correlation function and redshift space distortion from SDSS DR5 data

For z = 0.8–2.2 redshift interval, quasar pair correlation function parameters and β redshift space distortion parameter (connected to large-scale potential flows) values are estimated. We base them on the Main QSO Sample from SDSS Data Release 5. Standard correlation function form ξ(r) = (r ₀/r)^γ is used for comoving distances r = 2–50 Mpc between quasars. We fix the parameters of the cosmological model: Ω_Λ = 1 − Ω _M = 0.726 and H ₀ = 70.5 km/(s Mpc). We come to the best-fit parameter values of γ = 1.77 ± 0.20, r ₀ = 5.52 ± 0.95 Mpc/h for r in the range 2–30 Mpc, γ = 1.91 ± 0.11, r ₀ = 5.82 ± 0.61 Mpc for r in the range 2–50 Mpc. The mean β value is β = 0.43 ± 0.22.