Minimal and maximal values, V_min, $V_{min}^{2\mathrm{nd}}$, and V_max, of the velocity on N = 300 concentric circles on the map, centered on the BH, with radii regularly spaced from R_min = 0 to R_max = 1 kpc. Left panel: Velocity map overlaid by the extreme points of the velocity. The red dots (resp. blue triangles) are the maximal (resp. minimal) values at each radii. As discussed in the text, the green points correspond to the $V_{min}^{2\mathrm{nd}}$ velocity found when considering the second component detected and presented in Fig. 5. Right panel: Minimal and maximal values of the velocity, as a function of the distance from the BH. The negative distances corresponds to the blue shifted part of the map.