Overlays of the lowest and second highest contours of CO(J = 3–2) emission from Fig. 1 on grey-scales of (a) the Hα image, (b) the MIPS 24-μm image and (c) the MIPS 160-μm image. The grey-scale images are shown at their original resolutions which are 3.0 arcsec for the Hα image (from measurements of point sources in the field), 6 arcsec for the 24-μm image and 40 arcsec for the 160-μm image (Bendo et al. 2006). The grey-scale ranges are arbitrary and have been chosen to emphasize low to moderate intensity features. For the high contrast, high-resolution 24-μm image, we also show the central region in an inset. The star denotes the IR centre.