Table 2: The the photon absorption rate $n_{\gamma }$ for a typical ISM PAH molecule (at the distance from the star where the PAH emission is observed), and the minimum number of C-atoms per molecule needed for multi-photon processes to be significant ( $n_{\rm min}$ ).
star FWHM $n_{\gamma }$ $n_{\rm min}$

[AU] [s^-1] [C-atoms]

HD 97048 $110 \pm 40$ $\rm0.079^{+0.116}_{-0.036}$ $\rm 633^{+544}_{-377}$

HD 100546
$140\pm50$ $\rm0.049^{+0.069}_{-0.022}$ $\rm 1026^{+864}_{-602}$

**Table 2:** The the photon absorption rate $n_{\gamma }$ for a typical ISM PAH molecule (at the distance from the star where the PAH emission is observed), and the minimum number of C-atoms per molecule needed for multi-photon processes to be significant ( $n_{\rm min}$ ).
star	FWHM	$n_{\gamma }$	$n_{\rm min}$
	[AU]	[s^-1]	[C-atoms]
HD 97048	$110 \pm 40$	$\rm0.079^{+0.116}_{-0.036}$	$\rm 633^{+544}_{-377}$
HD 100546	$140\pm50$	$\rm0.049^{+0.069}_{-0.022}$	$\rm 1026^{+864}_{-602}$

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