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Fig. 4
Fractional abundances of C2H, c-C3H2, C4H, and HC3N as functions of AV. The boxes represent observations with error bars, and the lines are the model results for ζ = 10-17 s-1 (blue dashed), ζ = 10-15 s-1 (pink dotted), and, from Fig. 2, the mid-range ζ(NH) (green dashed) and high-range ζ(NH) (red solid).
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