a) Map of the NH₃(1,1) emission averaged over the main line (white contours) overlaid on an image of the 24.5 μm continuum emission obtained with Subaru. The circles in the bottom left and right indicate, respectively, the angular resolution of the IR and radio data. b) Same as panel a), for the NH₃(2,2) line (contours) and the 6 cm radio continuum map (background image). c) Overlay between the NH₃(2,2) (white contours), CH₃CN(5–4) (black contours), and 3.3 mm continuum (image) maps. The ammonia map has been smoothed to the same angular resolution (ellipse in the bottom right) as the methyl cyanide data (from F2008).