Impact of the beam size on the observed fluxes. Each individual panel shows the same kind of plot as shown in Fig. 5. In each panel one model with a certain disk extension is shown. For each of these models, the peak fluxes using different beam sizes are reported (coloured symbols in each panel). As a reference also the given line peak flux (blue diamonds) as derived from the line profile is shown (i.e. is not per beam). For the continuum, the big blue stars show the total integrated flux.