The Mid-IR Emission Structure of IRAS 16594-4656
  We report TIMMI2 diffraction-limited mid-IR images of the multipolar PPN IRAS 16594-4656. By using the Lucy-Richardson deconvolution algorithm we recover a two-peaked morphology in the innermost region at 8.6 and 11.5 microns. We interpret the observed mid-IR structure as the detection of the two limb-brightened peaks indicating the presence of a dusty toroidal structure in IRAS 16594-4656. We find that the supposed biconical openings of the dust torus are in good agreement with one of the bipolar outflows identified in the HST optical images. 
D. A. Garcia-Hernandez, A. Manchado, P. Garcia-Lario, Antonio Benitez   Canete, J. A. Acosta-Pulido, A. M. Perez Garcia