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Fig. 8

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Flux at 24 μm (upper-left), 70 μm (upper-right), 100 μm (lower-left), and 160 μm (lower-right), normalized to 4 kpc distance, as a function of luminosity from SED fits. The black crosses and blue diamonds represent the 24 μm-dark and -bright (respectively) cores nearer than 4 kpc. The green squares and red x’s represent the 24 μm-dark and -bright (respectively) cores further than 4 kpc. The magenta dashed line in the two upper panels represents the relationship shown in Dunham et al. (2008) for embedded protostars from the Spitzer c2d survey.

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