2D PDF of B_eq/B_dyn vs. γ_max of the particles that are in the lobe and in the wing, obtained at a time of 2.6 Myr (top) and 3.78 Myr (bottom). The particles inside the black dashed box are associated with lobes, outside of which are the wing particles. The figure shows that most of the particles have acquired a near-equipartition stage, i.e. B_eq ≈ B_dyn, while a few have also deviated from it. Stripes 1, 2, and 3 (i.e. S1, S2, S3) marked in the figure are associated with three types of particles that are found in the wings, which indicate several micro-physical processes occurring in the wing (see Sect. 5.2 for details). The corresponding colour bar represents the number of particles that are distributed in the bins where we set a visualisation limit.