Fig. 3
Flux histograms of the Herschel point-like sources in the CNC and Gum 31 for all five bands. In the bottom right corner a histogram of the flux ratio F160/F70 is shown. The solid red line marks the typical flux ratio for evolved stars which is ~6 as determined by Groenewegen et al. (2011). The two dot-dashed lines mark the 1σ interval of this ratio.
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