ALMA continuum emission at 340 GHz (12 m array). The greyscale goes from 1 to 180 mJy beam⁻¹. The blue contour levels are: 1 (about 5 σ), 10, 30, 60, 90, and 140 mJy beam⁻¹. The dashed red contours correspond to −1 mJy beam⁻¹. The beam of 340 GHz continuum emission (12 m array) is indicated in the bottom left corner. The green contours correspond to the ALMA continuum emission at 340 GHz (7 m array) shown in Fig. 1, with levels at 0.2, 0.4, 0.7, and 1.4 Jy beam⁻¹.