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Fig. D.3.

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Wind velocity profile mimicking pulsation-induced shocks just above the stellar atmosphere. The orange curve shows a beta velocity wind profile for β​ = ​5 and v0​ = ​1 km s−1. The blue curve in the left panel is constructed by: (i) using the shock velocity modelled by Bladh et al. (2019, see their Fig. 1) up to ∼10 R followed by; (ii) a beta velocity profile that is fitted through the velocity points beyond ∼8 R, with β​ = ​5 and the fit parameter v0 which produces a smooth transition from the pulsation-dominated region towards the freely expanding wind region. In the right panel, the blue curve is constructed in a similar way as in the left panel, but this time the shock velocities modelled by Bladh et al. (2019) are multiplied by a factor of 3.

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