Mass variation ΔM_i (%) of the two angular sectors i = 8 and i = 9 already shown in Fig. 5, for five different resolutions. The dotted curves correspond to a low resolution simulation with 2700 × 2700 mesh cells (dx = dy = 3.2 × 10¹⁴ m). The full cyan lines are obtained for the resolution used in Fig. 5 (high resolution with 5400² mesh cells and dx = dy = 1.6 × 10¹⁴ m). The other curves (full purple, dashed red, and dashed black) have been plotted for both intermediate (respectively for 3600², 4320² cells) and higher resolutions (7200² cells).