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wavelength/|m

Fig. 9.6 The infrared spectrum of a circumstellar envelope (IRAS 21282+5050) compared with a laboratory spectrum of a simple PAH molecule (methyl-coronene), and with a mixture of PAHs extracted from coal (After de Muizon et al., 1986)

wavelength/|m

Fig. 9.6 The infrared spectrum of a circumstellar envelope (IRAS 21282+5050) compared with a laboratory spectrum of a simple PAH molecule (methyl-coronene), and with a mixture of PAHs extracted from coal (After de Muizon et al., 1986)

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