Notes. The parameters were derived by De Becker et al. (2006). The predicted fluxes and the radii where the optical depth τ becomes 1 for 3 mm (R_{τ = 1}) have been derived from the Wright & Barlow (1975) equations (see Sect. 5.1) The values listed do not include clumping. When including clumping, the flux scales as and R_{τ = 1} scales differently as , where f_cl is the clumping factor. Note, however, that when comparing a clumped wind and a smooth wind that have the same flux, their needs to be the same, hence also their R_{τ = 1}.