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Fig. 8


Correlation between the N(OH)/ N(OH+) ratio and the molecular hydrogen fraction H i)+ 2N(H2)) for W31C, G34.26, and W49N. Colors indicate the velocity intervals defined in the legend of Fig. 6. Data points affected by saturated absorption are discarded. Correlation coefficients ρ are given in the upper right corners. For details see text.

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