Overlay of the map of the 1.3 mm continuum emission obtained with the very extended SMA configuration (contours) on that of the CH₃CN (12–11) line velocity (color scale). Contour levels are the same as in Fig. 1. Offsets are measured with respect to the phase center. The triangle marks the position of the HC Hii region in G24 A1 (Beltrán et al. 2007). The synthesized beam of the continuum (line) emission is shown in the lower left (right) corner.