Fig. 19.

Correlations between Frest 7.7 μm/ Frest 3.5 μm and the spectroscopic luminosities of the PAH 7.7 μm, LPAH (7.7 μm) (left), and PAH 6.2 μm, LPAH (6.2 μm) (right). The PAH galaxies are shown with one-sigma error bars in different colours for different redshift bins: blue, black, and red for the nearby, mid-z, and higher-z galaxies, respectively.
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