Overlay of the map of the 1.3 mm continuum emission (contours) on that of the CH₃CN(12–11) line velocity (color scale). Contour levels range from 0.1 to 2 in steps of 0.2 Jy/beam. Offsets are measured with respect to the phase center. The two white dots denote the free-free continuum sources detected by Cesaroni et al. (2010). The synthesized beam is shown in the bottom left.