Left: Data image, Right: Values for the χ² and shape parameter 𝒮 (Sect. 3.4), quantifying the quality of the models. The green regions indicate that the models are generally good models. Yellow curves indicate results for the inner ring/region while green curves show that for the second ring/region. Major axis profiles highlighting the radial location of the different regions are shown in Fig. 3 and Fig. 4. The beam size and a 25 au scale are indicated in the bottom left corner of the first panels.