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Fig. 4


Spitzer-IRAC 8 μm emission maps (color scale) of Bubbles N97, N98, B2, and B1 overlaid with 1.4 GHz radio continuum emission contours (black). “” indicates the position of H ii region G047.028+0.232 (Anderson et al. 2011). The right color bar is in units of mJy sr-1.

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