Intensity profiles of radiative transfer models. The three panels from left to right display results for masses of 0.3, 3, and 30 M_⊙. In each panel, the lower and upper sets of curves show background-subtracted profiles of starless cores and protostellar envelopes, respectively, for selected Herschel wavelengths of 160, 250, 350, and 500 μm. For reference, the black dashed curves visualize a Gaussian profile and a power-law slope I_λ ∝ θ^₂, whereas the dotted vertical line indicates the outer radius of the models.