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Fig. 5

image

Toy model abundance scenarios for H2CO (left) and C18O (right). X is the molecular abundance with respect to molecular hydrogen (grayscale). Red solid contours show the temperature structure of the gas in the disk. Black dashed contours show the density structure of the gas in the disk as the log of the molecular hydrogen number density. The X distribution in each panel follows the best-fit normalized model (Table 2).

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