Range of the neutral hydrogen concentration profiles resulting from the fit of the measured absorption (see Figs. 8 and 12) for three H/He ratios, covering the whole temperature and mass-loss rate ranges of those figures. The solid thicker lines are the mean profiles. The H density derived from Lyα measurements reported by García-Muñoz (2007), Koskinen et al. (2013), and Salz et al. (2016) is also shown.
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