Radial dependence of Mg II absorption strength. Mg II absorber rest-frame equivalent width versus impact parameter normalized by the galaxy’s virial radius (ρ/R_vir). The best fit for high-z (z ∼ 1.1) and low-z (z ∼ 0.5) subsets comprising the top and bottom 30% of the sample is shown as a dashed and solid line, with 1σ uncertainty as a hatched region. The average W₂₇₉₆ for the z ≤ 0.5 (blue square), 0.5 ≤ z ≤ 1.0 (green triangle), and z ≥ 1 (red circle) subsets, for ρ/R_vir bins shows a clear evolution of mean absorption strength.