Fig. 11
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6.2 and 7.7 μm peak positions of seven cationic PAH species (data taken from Ricca et al. 2021). Uncertainties for the theoretical band positions, calculated in Mackie et al. (2016, 2018) and Lemmens et al. (2019), are shown by the gray error bars (for details see Appendix H). The blue and red circles represent the observed peak positions of the blue and red components of the 6.2 and 7.7 μm bands in NGC 7027, respectively.
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