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Table D.1

Summary of the line intensity correlation plots in Fig. D.1.

x y a b ρP ρS
IC2H 4–3 102 ⋅ IAIB 3.3 μm 0.65 −0.51 0.62 0.65
IC2 H 4–3 I[CI] 609 μm 0.67 0.92 0.54 0.54
IC2 H 4–3 104 ⋅ IH20−0 S(9) 1.39 −1.61 0.76 0.79
IC2 H 4–3 104 ⋅ IH2 1−0 S(1) 1.47 −1.50 0.71 0.71

Notes. Regressions fitted to the molecular PDR data (bluish areas in Fig. D.1) in a weighted least-square fit, log10y = a log10 x + b. Coefficient ρP is the Pearson coefficient that measures the linearity of the log – log correlation. ρS is the Spearman coefficient that measures the monotonic relationship. The typical error in the fits for a and b is 0.01.

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