Time evolution of a ring perturbed by a large mass anomaly µ = 0.1, to be compared with Fig. 6. The ring is initially centered around 1/3 resonance distance a₀ with a full width of 0.6. This is slightly larger than the theoretical maximum of epicyclic excursions, a₀e_peak ≈ 0.27 and over a factor of 10 larger than the width of the resonance zone, W_res ≈ 0.026. Particle size R = 0.001 corresponds to 200 m for Chariklo’s rings. The three upper panels show the self-intersecting streamline forced by the 1/3 SOR. This self-crossing disappears around T = 6 000 to form a streamline dominated by a m = 1 azimuthal mode. In contrast to the case of narrower initial rings (Fig. 6), two supplementary rings form both interior and exterior to the main ring at T = 6 000–8 000. However, the outer ringlet is rapidly swallowed by the main ringlet (at T ≈ 10 000), while the inner ringlet survives until the end of the simulation. The last panel on the lower right (red color palette) shows the time evolution of the L_z distribution until the end of the simulation at T = 30 000.