Moment 0 map of the ¹²CO emission (contours from 3σ in steps of 1σ, where σ  =  5.6 mJy beam⁻¹), overlaid on the continuum (greyscale from 0 to 25% of maximum), in the combined data set. The ¹²CO image was convolved with a 2D Gaussian to 10 au resolution to enhance the S/N in the map, while the continuum was convolved with a 2D Gaussian to 20 au resolution. The emission is integrated from 2.0–6.0 km s⁻¹ with respect to the source velocity, 8.3 km s⁻¹ w.r.t. υ_LSR. The dashed box denotes where the line rms was calculated using the line free channels. Selected mean spectra averaged over circular regions (10 au in radius) are indicated by the coloured points and the corresponding coloured spectral profiles. The convolved beams are shown in the lower left corner of the map. For clarity, a zoomed-out version of this figure with only the continuum data is presented in Fig. A.1.