Same as Fig. A.2 but for D = 0.25 < D_crit. An interval of initial conditions produces bounded orbits (in green), which loop forever inside the unit circle. They approach closer to the origin than the red trajectories, producing a smaller circular cavity (grey disc, see (Eq. 37)). For comparison, the same circles as in Fig. A.2 are represented. We note that the red trajectories are still limited by the W₀(exp[−1]) radius (inner dashed circle).