Same as in Fig. 11, with two additional theoretical absorption profiles calculated with the same magnesium escape rate Ṁ_Mg⁰=2.9×10⁷ g s^-1 and electron densities corresponding to 3σ limits (χ² = 811.4) from the global best fit with n_e(3R_p) = 4.5 × 10⁹cm^-3 (long-dashed black line) and n_e(3R_p) = 7.7 × 10¹¹cm^-3 (dashed black line). The electron density mostly impacts the width of the absorption profile in its blue wing.