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Fig. 8.
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H2 0-0 S(3) intensity relative to 7.7 and 11.3 μm PAH bands diagnostic plot, quantifying shock-driven collisional excitation of H2. Symbols are as in Fig. 5. Uncertainties, between 10 − 50%, are omitted for clarity. The nuclear lower limit results from partial detection of the 7.7 μm feature (Appendix C).
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