Mirrored ¹²CO J = 3−2 channel maps zoomed in on the cavity. Contours are 3σ to 6σ. A gallery of mirrored channel maps for all cubes is available in Appendix Figure F6. Panel (a) is the systemic velocity; panels (b) and (c) are blueshifted with respect to the planet’s line-of-sight velocity (see Section 5.2), while panels (d) and (e) are redshifted. The dotted ellipses indicate the possible coplanar orbits of the planets, and the isovelocity contours are calculated with a flat surface.