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Fig. 9
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CH+ ν = 1 → 0 lines detected in NGC 7023. Detection of CH+ lines restricted to DF1 and 2 (green and red) regions. All detected lines are P-branch from 1–8. P(1) is potentially confused with the He I 3D-3Fo multiplet and P(2) blended with the much stronger (0,0)S(14) H2 line and is not independently detected.
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