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Fig. 14

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Overview of W33 complex and stars within. Left: overview of W33 region seen in the 8 μm channel of the Spitzer telescope with a 2″ resolution. The coloured markers show the massive infrared sources identified using Spitzer/IRAC (Messineo et al. 2015). Right: PPMAP column density map with a 2.5″ resolution, with the cores from the getsf filtered core catalogue. The colours represent the different categories of cores identified in Figs. 9 and 10. The filled cores correspond to the ones located inside the H II regions and their surroundings (see definition in Sect. 3.5).

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