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Fig. 15

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Ratio of molecular to atomic line luminosities as a function of the Galactocentric radius. The light coral box indicates the range of the line luminosity ratio and the Galactocentric radius for LM YSOs in the nearby clouds, which are excluded from the power-law fit to the remaining YSOs (dashed black line). Gray dotted horizontal line indicates where the molecular luminosity is equal to the atomic luminosity.

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