Spectral Energy Distribution of the Massive Protostellar Source IRA18223-1243

We analyze the spectral energy distribution of the massive protostellar source 1RAS18223-1243 using a simple model. 1RAS18223-1243 is a bright Galactic infrared source located at a distance of 3.7 kpc in the Galactic plane, and it is thought to be associated with, at least, one high mass protostellar object (MMPO). This source is a very well-studied object and it has been modeled in the millimeter and far-infrared bands. That model includes an envelope of cold dust plus a warm dusty disk around a massive protostellar like object, which is deeply embedded and it has not been identified yet. We propose that 2MASS 318251092-1242155 is the massive protostellar object. Then, we modeled the HMPO as a black body with high extinction and propose a simple model based on two gray bodies for the relatively cold components (dust envelope and dusty disk) which reradiate the absorbed energy of the central source in a consistent energy balance.