Notes. The normalization of the power spectrum, σ₈, is the standard deviation of perturbations in a sphere of radius 8 h^-1 Mpc today. Ω_m, Ω_Λ, and Ω_b are the matter, the dark energy and the baryonic matter density parameters, respectively. w₀ is the dark energy equation of state parameter, which is equal to the ratio of dark energy pressure to its density. The spectral index, n_s, is the slope of the primordial power spectrum. The dimensionless Hubble constant, in H₀ = 100   h km s^-1 Mpc^-1, characterizes the rate of expansion today.