Equivalent width (W₂₇₉₆) versus impact parameter (ρ) relation for MgII galaxies. Bottom panel: W₂₇₉₆ versus ρ distribution for Mg II galaxies from literature. The best-fit anticorrelation between W₂₇₉₆ and ρ is shown as a solid line along, and the 16th and 84th percentiles are indicated as a hatched region. The best-fitting relationships from the literature for z ∼ 1 Mg II systems from Lundgren et al. (2021, dot-dashed line) and a global fit for 0 < z < 1.5 from Guha et al. (2024, dashed line) are also plotted for reference. Top panel: Similar to the above but for only USMgII galaxies (circle), color coded by the M_⋆. The quasar-galaxy pairs classified as “wind”, with ϕ ≥ 50°, and “disk”, with ϕ ≤ 30°, are respectively represented with star and square symbols. The wind subset preferentially shows a higher W₂₇₉₆ and a larger scatter relative to the disk subset.