Fig. 8.
Velocity dispersion, corrected only for instrumental broadening, with overplotted dust contours. The cone of 2× the Mach angle of downstream propagation of perturbations is also plotted for the Mach number at knot B (open square), ℳ = 4.63. The extinction outside of the plotted contours is negligible, see the reddening map in Fig. B.2.
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