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Fig. 6

Column density maps created using Herschel 350 μm data and the temperatures shown in Fig. 4. The scaling for all panels is the same; the values range from 1020 cm-2 to 1022.5 cm-2. The green curves show the approximate extent of the bubble interiors. Enhancements are seen along the bubble PDRs.
This figure is made of several images, please see below:
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