Dust continuum images and channel maps for the model series in comparison to the observations. Each row shows, from left to right, the observations, the SMOOTH, the DUSTGAPS, the GASGAPS, and the GASGAPS S model. Toprow: the dust continuum (note the logarithmic scale) is shown for comparison; five remaining rows: ¹²CO J = 2−1 emission for selected velocity channels. The velocity is given in the top left corner of each row. The dashed ellipses in the channel maps indicate the location of the dust gaps for reference. The filled white ellipses in the bottom left corner of each panel indicate the beam size of the observations.