a) End part of the evolutionary tracks in the HR diagram for the 20 and 25 M_⊙ rotating models. The end point is shown as an orange square. The bistability limit, where jumps in Ṁ and v_∞ occur, is indicated in blue. The vertical line corresponds to the bistability limit computed for the end point according to the Vink et al. (1999) recipe. b) CSM density structures obtained from the evolutionary models (solid lines). The CSM densities with dashed lines are the CSM without the mass-loss variations and used to obtain the reference LCs.