Fig. D.2
Fractional contribution from circumcoronene derivatives in the NW PDR of NGC 7023 according to the physical conditions modelled by the Meudon PDR Code. Unlike coronene, these molecules are found in their normally hydrogenated state (NH= 18) with traces of partial dehydrogenation at the surface of the cloud, and at AV~ 1.8. No contribution from trications is observed.
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