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Fig. 3.

image

Median spectra of sources with PAH6.2 μm EQW ≥ 0.4 μm, and PAH3.3 μm EQW < 0.04 μm (green; seven objects) or 3.3 μm PAH EQW ≥ 0.04 μm (black; 79 objects). The ranges of the spectra are 1σ uncertainties of the estimated median values. The inset panel shows a zoom-in of the 2.5–5 μm region with the continuum fits in red. The orange arrows indicate the wavelengths where the AKARI continuum color, Fν(4.3 μm)/Fν(2.8 μm), is measured.

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