Posterior distributions of the best-fit parameters of the geometrical model presented in Sect. 3.1. Left panel: posterior distributions for the model applied to the V² data at PA_⊥ = 40° ± 20°, while the right panel displays the posterior distributions for the model at PA_∥ = 130° ± 20°. The 2D distributions show 1 and 2 standard deviations encircled with a black contour. The mean of each distribution is displayed with a blue square. The 1D histograms show the expected value (mean) and ±1σ with vertical dashed lines, together with their corresponding values at the top.