Fig. 6
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FIR intensity versus (projected) distance from respective central stars in M42 (top left: Veil Shell, bottom left: OMC4), M43 (top right) and NGC 1977 (bottom right). The division of M43 and NGC 1977 into the regions given in the legend is described in Sect. 3.2. The blue solid lines are the fits summarized in Table 1. The blue dashed lines indicate a FIR intensity scaling with d−2.
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