Maps of the typical line-of-sight velocity dispersion along each line of sight in the J = 2 − 1 transition of ¹²CO, for the shadow-driven case (left) and the planet-driven case (right). The upper panels are computed from the raw datacubes, while the lower panels are computed from the datacubes convolved with the fiducial beam. In the planet-driven case, we see a strong localized increase in velocity dispersion near the planet location, and in the interior of the disk; in the shadow-driven case we see four separate peaks along the outer edge of the gap, corresponding to the launching points of the spirals.