JWST’s MIRI/MRS images of the entire region (upper panel, (a)) and the zoomed-in brightest center (bottom panel, (b)) of the dual quasar system J0749+2255. For spectral extraction, we take 42 large circular apertures (with 6.6 kpc for each aperture) for the outer region surrounding the quasar cores (from #6 to #47), and four small circular apertures (with 1.7 kpc for each aperture) for the bright central region (from #0 to #3). In addition, a large ellipse (aperture #5) for the entire inner region is also taken. The small circles and the large ellipse have the same size as those in Figure 1.