NO column density (left) and emission (right) predicted by the model for the dust trap side (solid blue) and non-dust trap side (dashed blue). The horizontal black lines in the left panel indicate the NO column density or the upper limit derived by the observations. The black line in the right panel indicates the horizontal cut of the NO emission through the dust trap and the triangles indicate the 3σ upper limit on the intensity in the north. The horizontal grey line in the right panel indicates the beam size. Note: the two panels have a different horizontal axis.