Left: NH₃ column density map (top) and rotational temperature map overlaid with 3 mm continuum and NH₃(1, 1) integrated intensity contours, respectively. Right: the N₂H⁺ column density map overlaid with NH₃(1, 1) integrated intensity contours (top), and N₂H⁺(1–0) excitation temperature map overlaid with N₂H⁺(1–0) integrated intensity contours. The 3 mm continuum contours start at 3σ in steps of 4σ. All the other contour levels parameters are the same as in Fig. 5. The synthesized beam of the temperature and column density map is shown in the bottom left corner of each panel, and the synthesized beam of the contour map is shown in the bottom right corner of each panel.