Table 3: Integrated photon absorption rates $\mathcal{R}$ (s-1) and average absorbed energy $\mathcal{E}$ (eV), computed using calculated photo-absorption cross-sections (Malloci et al. 2004) for the whole sample of 20 neutral PAHs and their cations in the three RFs considered.
    Radiation field

Molecule		 Charge state ISRF Red Rectangle IRAS 21282+5050
    $\mathcal{R}$ (s-1) $\mathcal{E}$ (eV) $\mathcal{R}$ (s-1) $\mathcal{E}$ (eV) $\mathcal{R}$ (s-1) $\mathcal{E}$ (eV)

Naphthalene (C10H8)		 Neutral 3.9 $\times$ 10-8 7.9 5.7 $\times$ 10-7 5.6 3.8 $\times$ 10-3 8.9
  Cation 6.6 $\times$ 10-8 4.7 3.1 $\times$ 10-6 2.8 3.1 $\times$ 10-3 9.0
Fluorene (C13H10) Neutral 5.2 $\times$ 10-8 7.8 8.9 $\times$ 10-7 5.2 4.9 $\times$ 10-3 9.2
  Cation 1.3 $\times$ 10-7 4.0 6.7 $\times$ 10-6 2.7 4.1 $\times$ 10-3 9.2
Anthracene (C14H10) Neutral 6.4 $\times$ 10-8 6.8 2.5 $\times$ 10-6 4.0 5.2 $\times$ 10-3 8.6
  Cation 1.7 $\times$ 10-7 3.4 8.5 $\times$ 10-6 2.5 4.4 $\times$ 10-3 8.6
Phenanthrene (C14H10) Neutral 5.6 $\times$ 10-8 7.4 1.1 $\times$ 10-6 5.1 5.1 $\times$ 10-3 8.8
  Cation 1.7 $\times$ 10-7 3.2 9.1 $\times$ 10-6 2.3 4.3 $\times$ 10-3 8.8
Pyrene (C16H10) Neutral 8.1 $\times$ 10-8 6.4 3.7 $\times$ 10-6 3.8 5.7 $\times$ 10-3 8.6
  Cation 1.4 $\times$ 10-7 4.0 9.2 $\times$ 10-6 2.7 4.9 $\times$ 10-3 8.6
Fluoranthene (C16H10) Neutral 7.6 $\times$ 10-8 6.8 3.2 $\times$ 10-6 3.8 6.0 $\times$ 10-3 8.9
  Cation 2.4 $\times$ 10-7 3.0 1.3 $\times$ 10-5 2.2 5.1 $\times$ 10-3 8.8
Tetracene (C18H12) Neutral 1.3 $\times$ 10-7 5.4 5.8 $\times$ 10-6 3.5 6.8 $\times$ 10-3 8.4
  Cation 3.7 $\times$ 10-7 2.8 1.9 $\times$ 10-5 2.2 6.0 $\times$ 10-3 8.4
Chrysene (C18H12) Neutral 8.6 $\times$ 10-8 6.7 2.9 $\times$ 10-6 4.3 6.7 $\times$ 10-3 8.7
  Cation 4.6 $\times$ 10-7 2.2 3.0 $\times$ 10-5 1.6 5.9 $\times$ 10-3 8.7
Perylene (C20H12) Neutral 1.7 $\times$ 10-7 4.6 1.0 $\times$ 10-5 2.9 7.1 $\times$ 10-3 8.7
  Cation 2.3 $\times$ 10-7 3.7 1.4 $\times$ 10-5 2.6 6.2 $\times$ 10-3 8.6
Pentacene (C22H14) Neutral 1.6 $\times$ 10-7 5.4 7.2 $\times$ 10-6 3.8 8.2 $\times$ 10-3 8.3
  Cation 7.2 $\times$ 10-7 2.3 4.3 $\times$ 10-5 2.0 7.5 $\times$ 10-3 8.2
Benzo[g,h,i]perylene (C22H12) Neutral 1.3 $\times$ 10-7 5.8 7.0 $\times$ 10-6 3.4 7.8 $\times$ 10-3 8.5
  Cation 2.8 $\times$ 10-7 3.3 1.6 $\times$ 10-5 2.4 6.9 $\times$ 10-3 8.4
Anthanthrene (C22H12) Neutral 1.7 $\times$ 10-7 4.9 1.1 $\times$ 10-5 3.1 7.9 $\times$ 10-3 8.4
  Cation 3.2 $\times$ 10-7 3.1 2.0 $\times$ 10-5 2.3 7.1 $\times$ 10-3 8.4
Coronene (C24H12) Neutral 1.3 $\times$ 10-7 6.2 4.5 $\times$ 10-6 4.1 8.5 $\times$ 10-3 8.5
  Cation 3.1 $\times$ 10-7 3.3 1.6 $\times$ 10-5 2.4 7.6 $\times$ 10-3 8.4
Dibenzo[cd,lm]perylene (C26H14) Neutral 4.6 $\times$ 10-7 3.0 4.0 $\times$ 10-5 1.9 9.5 $\times$ 10-3 8.5
  Cation 4.5 $\times$ 10-7 3.1 2.8 $\times$ 10-5 2.5 8.4 $\times$ 10-3 8.4
Bisanthene (C28H14) Neutral 5.1 $\times$ 10-7 2.7 2.5 $\times$ 10-5 2.0 9.9 $\times$ 10-3 8.5
  Cation 5.7 $\times$ 10-7 2.5 3.6 $\times$ 10-5 1.7 9.0 $\times$ 10-3 8.4
Terrylene (C30H16) Neutral 7.7 $\times$ 10-7 2.7 3.9 $\times$ 10-5 2.1 1.1 $\times$ 10-2 8.6
  Cation 9.6 $\times$ 10-7 2.4 4.8 $\times$ 10-5 2.0 1.0 $\times$ 10-2 8.6
Ovalene (C32H14) Neutral 2.8 $\times$ 10-7 4.6 2.0 $\times$ 10-5 3.1 1.1 $\times$ 10-2 8.2
  Cation 5.5 $\times$ 10-7 2.9 3.8 $\times$ 10-5 2.2 1.1 $\times$ 10-2 8.2
Circumbiphenyl (C38H16) Neutral 3.1 $\times$ 10-7 4.7 2.7 $\times$ 10-5 3.1 1.3 $\times$ 10-2 8.2
  Cation 8.7 $\times$ 10-7 2.4 6.9 $\times$ 10-5 1.9 1.2 $\times$ 10-2 8.2
Quaterrylene (C40H20) Neutral 2.2 $\times$ 10-6 2.0 1.1 $\times$ 10-4 1.7 1.5 $\times$ 10-2 8.6
  Cation 2.7 $\times$ 10-6 1.9 1.4 $\times$ 10-4 1.6 1.4 $\times$ 10-2 8.5
Dicoronylene (C48H20) Neutral 8.8 $\times$ 10-7 3.2 5.8 $\times$ 10-5 2.6 1.7 $\times$ 10-2 8.1
  Cation 2.2 $\times$ 10-6 2.0 1.5 $\times$ 10-4 1.6 1.6 $\times$ 10-2 8.0

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