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Fig. 5


H2O (blue), CO (gray), and CH4 (black) abundances at 106 yr on a grain surface (panel A) and in the gas phase (panel B) plotted against total H2 density for the three models 440-noED (solid line), 23-noED (dotted line), and 440-ED (dashed line). Panel C contains the atomic carbon abundance on a grain surface at the same time and the same models.

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