Footpoint radii r₀ and parameter ${\lambda }_{\varphi }=\mathrm{\Omega }{r}^2/{\mathrm{\Omega }}_0{r}_0^2$ determined for the B1a, B1b, and B2 shells following the diagnostic procedure in Ferreira et al. (2006). The diagram also reports the results published for the wind from DG Tau B (de Valon et al. 2022), and for the wind from HH 30 (Louvet et al. 2018; López-Vázquez et al. 2024a). We note that the results for DG Tau B are derived with a different selection of the input data in the tomographic analysis, corresponding to different assumptions on the structure of the wind (see Appendix E).