Aims. The dust emission spectrum and the brightness profile of passively heated condensed cores is analyzed in relation to their astrophysical environment. The model is used to study systematically the radiative transfer effects on essential parameters such as the dust emissivity, dust temperature, and luminosity of the cores and to derive uncertainties in typical estimates of the IR flux and size. Methods. The cores are modeled as critically stable self-gravitating spheres embedded at the...[Show more]
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