High spatial resolution imaging of NGC 1068 in the mid-infrared

Mid-infrared observations of the central source of NGC 1068 have been obtai ned with a spatial resolution in the deconvolved image of 0."1 (similar to7 pc). The central source is extended by similar to1 " in the north-south di rection but appears unresolved in the east-west direction over most of its length. About 2/3 of its flux can be ascribed to a core structure that is i tself elongated north-south and does not show a distinct unresolved compact source. The source is strongly asymmetric, extending significantly farther to the north than to the south. The morphology of the mid-infrared emissio n appears similar to that of the radio jet and has features which correlate with the images in CO mi. Its 12.5-24.5 mum color temperature ranges from 215 to 260 K and does not decrease smoothly with distance from the core. Si licate absorption is strongest in the core and to the south and is small in the north. The core, apparently containing 2/3 of the bolometric luminosit y of the inner 4 " diameter area, may be explained by a thick, dusty torus near the central active galactic nucleus (AGN) viewed at an angle of simila r to 65 degrees to its plane. There are, however, detailed difficulties wit h existing models, especially the narrow east-west width of the thin extend ed mid-infrared "tongue" to the north of the core. We interpret the tongue as reprocessed visual and ultraviolet radiation that is strongly beamed and that originates in the AGN.