Fig. 8
RCW 120 Herschel column density map (Anderson et al. 2012). The circles indicate the different regions used for the PDFs. The white cross indicates the position of the main ionizing source (O8 star). The extension of the Hα emission and the limit of the H ii region is inside region 1. The blue circle indicates the position of the possible compressed core collapse identified in the PDFs.
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