Mach number (left) and its pixel distribution (right). The white contours and red crosses mark the ALMA 870 μm emission cores, with contour levels the same as in Fig. 1. The dashed black and red vertical lines mark the typical Mach number in the literature, representative of quiescent and protostellar stages, respectively. The brown histogram corresponds to the brown circle of the central region (covering cores A and B), and the blue histogram is that of the whole G35.2 clump.