Left column: same as the right panel in Fig. 1. Middle column: disk-only models created using RADMC-3D and tclean with the best-fit values from the MCMC fitting (see Table 2), as described in Sect. 4.2. Right column: residuals from subtracting the model visibilities from the data visibilities, as described in Sect. 4.3. Top row: Gaussian model and residuals corresponding to that model. Bottom row: power-law model and residuals corresponding to that model. All panels are imaged using a natural weighting and a u-v taper, as described in Sect. 2, and the contours are ±[2, 4, 6] × 10.4 µJy beam⁻¹, the RMS noise level.