Fig. 2
Composite colour image of the W5-E field observed by Herschel. Red is the 250 μm Herschel-SPIRE data, which traces cold dust emission, green is the 100 μm Herschel-PACS data, which traces emission mainly from dust at higher temperature located in the PDRs, and blue is the DSS2-red survey, which traces the Hα emission of the ionized gas. The yellow cross lies at the position of HD 18326, the exciting star of W5-E.
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