v_∞ vs T_eff. The green dots represent our results. The green line is the linear fit. The dashed magenta line is the Z-dependent v_∞–T_eff relation from Hawcroft et al. (2024b). The solid magenta line was obtained from fitting Hawcroft et al. (2024b) results for O and B supergiants only. The solid blue line was obtained from fitting the results of Bernini-Peron et al. (2024). The grey crosses are v_∞ calculated from Vink & Sander (2021) recipe. The black triangles represent v_∞, calculated from the recipe in Krtička et al. (2021).