Comparison between observations and wind models at N_H I = 10²⁰ cm⁻², v_exp = 200 km s⁻¹, σ_Src = 150 km s⁻¹. The sketches along the axes give a visual representation of the models, with increasing θ_o, Wind along the y-axis and increasing θ_LOS along the x-axis, represented with arrows colored according to Fig. 6. The gray scale indicates the agreement between the observed and modeled total intensities I, evaluated through the χ_ν² value (colorbar on the right), with lighter tones representing better agreement (see the top row of Fig. 6). Red hatched regions rule out models whose degree of polarization P_Lyα is larger than (and thus not consistent with) the observational 1σ upper limit P_Lyα (see the bottom row of Fig. 6).