Fragmentation rate of the studied species (apart H₆-Pyr⁺) as a functionof the rescaled average absorption rate (by the γ factor, seetext for details). The pyrene-based (resp. coronene-based) species are in gray (resp. red). The cyan (resp. blue) edge indicates the methylated (resp. ethylated) species. The dashed line corresponds to . The fragmentation fraction (Y_frag) and the cooling fraction (Y_cool) are displayed for Cor⁺ as an example. For MeCor⁺ and EtCor⁺, the arrows point to the increased stability in the fragments formed by VUV processing. All the Y_cool values are given in Table 1.