Radial Mach number vs. temperature (h), seen in polarcoordinates. The color maping is such that sub-(super)sonic regions appear in blue (red). The vortex center is always located at φ = 0. The dashed black lines indicate v_φ = v_K. The global structure is not self-similar when h varies, as one can see the Keplerian line undergoes a reconnection as temperature increases, and spirals in the outer disk are shocking(Mach 1, white) closer to the vortex. Small supersonic (red) regions are found in the inner region of the disk (r ≃ 120 AU), as is highlighted in an inset in the rightmost panel. The flow remains subsonic everywhere else.