Half-opening angle as a function of distance for all the simulated models. Top panel: magnetically dominated jet models. Bottom panel: thermally and kinetically dominated jet models. The force-free magnetically dominated setups are shown in continuous lines, the force-free thermally dominated in dashed lines, the kinetically dominated in dotted lines, and the nonforce-free in dashed-dotted lines. The data points represent the intrinsic half-opening angle profiles of NGC 315 obtained by Ricci et al. (2022) for multi-frequency and multi-epoch VLBI observations.