Fig. 9
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Observed emission ratio Re (Table 2) and modeled photoelectric heating efficiency for PAHs, ϵPAH, as a function of the ionization parameter γ, for various stellar effective temperatures. The upper curve corresponds to Teff = 4 × 104 K, and the lowest curve to Teff = 104 K. All models use NC = 54 and a gas temperature of T = 500 K.
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