Fig. 3

Left frame: contours show the velocity-integrated NH3(3, 3) transition emission from NGC 253 integrated from 144 km s-1 to 341 km s-1. Overlain is the gray-scale image of the continuum at 23.7 GHz with the upper bar providing the flux density scale in mJy beam-1. The contour levels are −3, 3, 6, 12, 18, 24 times 1.2 mJy km s-1 beam-1. Right upper frame: integrated NH3 (3, 3) spectrum. Right lower frame: ammonia (3, 3) transition spectra integrated over the six clouds of NGC 253 identified by the boxes in the velocity integrated NH3 (3, 3) emission (left panel).
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