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Fig. 1

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N band aquisition images of the observed targets for which spectra were obtained. The scale bars indicate a physical size of 5000 AU, assuming distances of 3.6 kpc and 2.7 kpc to RCW106 and RCW122, respectively. The offsets marked in the figure are with respect to the positions in Table 1, which correspond to the peak emission in each image, except for RCW 122_1 where it represents the midpoint of the dark lane separating the two emission peaks.

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