Example of the broad Hα wings from the 2007–10 active phase (solid line), compared with those observed during quiescent phase (dashed line). Both spectra were taken at the same orbital phase, ϕ = 0.16. Local continua were subtracted from the spectra. The spectra were dereddened. The models (dotted lines) indicate a significant enhancement of the mass-loss rate during activity with respect to quiescence (Table 7, Sect. 3.2.2).