Maps of the observed-frame 340-GHz (corresponding to rest-frame 260 μm) continuum emission in (left to right) galaxies W, T, C and M. Continuum fluxes are in mJy beam⁻¹ following the colour bar above each panel. Each panel is 3″ × 3″ in size and the axes, in arcsec, are centred on the kinematic centre of each galaxy, as obtained from Kinemetry. These kinematic nuclear positions, hereafter used as the galaxy positions, are: W: 08:49:33.685, +02:14:44.680; T: 08:49:32.947, +02:14:39.696; C: 08:49:33.908, +02:14:44.860; M: 08:49:33.795, +02:14:45.595. For galaxies W and T, the kinematic major and minor axes are shown with thick and thin grey lines, respectively.