Fig. 11
Time-averaged fractional abundances ⟨ X(t) ⟩ = ∫X(t′)dt′/t are shown with solid lines for nH = 2 × 104cm-3, ζ = 10-17s-1, and vs = 30 km s-1. Observed abundance ratios over total hydrogen abundance are shown as filled colors with the assumption of CO/Htot = 4 × 10-5. The gray line with the right ordinate scale shows the value of confidence level as a function of time.
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