Contour maps of the reduced χ² of the He(2³S) absorption obtained in the modeling for an H/He of 98/2. Dotted curves represent the best fits, with filled symbols denoting the constrained ranges for Ṁ and temperature for a confidence level of 95%. We over-plotted the curves and symbols when including the estimated effects of the stellar winds (H/He = 98/2, downward triangles) and for H/He ratios of 99/1 and 90/10. The labels correspond to the hydrogen percentage, e.g. ‘98’ for an H/He of 98/2. The small black dots represent the T-Ṁ grid of the simulations.