ANALYSIS OF THE IR AND SUB-MM EMISSION OF 4 POST-AGB STARS

The goal of this work is to derive the physical properties of dust env elopes around post-AGE stars by means of radiative transfer calculatio ns. The model spectral energy distributions (SEDs) have been compared with observational data of the post-AGE stars IRAS 10215-5916, 16342-3 814, 17150-3224, and 19500-1709 in the wavelength range from 0.4 to 13 00 mu m. The match between our model SEDs and the observational data i s very satisfactory. As a result, we have obtained estimates of the in ner and outer radii, the density, the temperature, and the mass of the envelopes of the four objects.