Radially averaged column density profiles (bottom), LoS-averaged dust temperature (center), and luminosity-to-mass ratio profiles (top), for individual sources (thin black solid lines) as well as mean profiles (thick lines) of starless and protostellar cores. Note that the latter ones are fits to the mean profiles, while we list the means of the indivudual profile parameters in Table 5, which is not exactly the same. Thin lines in the rightmost panels indicate the 1σ uncertainty ranges of the mean profiles.