Extended Data Fig. 1: A comparison of emission heights inferred for the ¹²CO emission.

The grey points in the background represent individual measurements following ref. ¹⁵, while the red contour shows the Gaussian process model of this surface including 1σ uncertainties, as described in ref. ⁶. Grey lines are random samples from the parametric fit derived from modelling the line-of-sight velocity map, with their spread demonstrating the 1σ uncertainties. The dust gap locations^5,28 (D10 to D145) and radial ___location of the velocity perturbation found⁷ in ¹²CO, the ‘CO kink’, are marked. The major axis of the beam is shown for scale at bottom right.