a) Colorscale: SEST 1.2  mm; contours: NH₃(1, 1) zeroth moment. The contours start from 15% of the peak, in step of 15% of the peak integrated emission. The peak flux and the ΔV of the line are given in Table 2. The position of each clump in our sample is indicated by a black cross. The SEST beam is indicated as a white circle, and the ATCA beam is shown as a black circle. The IRAS name is indicated above each panel, and the clump names are shown in the figures. The fields with poor uv-coverage (see Sect. 3) are not used to produce overlays, as the maps produced are not as reliable as the others.