Dust and gas observations in the IRS 48 disk. Left: 0.89 mm continuum emission showing the major asymmetric dust trap in the south. Middle: Moment 0 map of the sum of the three NO lines at 351.1 GHz. Right: Moment 0 map of the ¹³CO 3 − 2 transition. The position of the star and the beam of the observations are indicated with the white star and the white ellipse, respectively, in each panel. A 100 AU scale bar is indicated in the bottom of the left panel.