CO desorption from interstellar icy grains induced by infrared excitation of superhydrogenated polycyclic aromatic hydrocarbons

Open Access

Table 1

Overview of the experiments performed in this work with column densities, N, and irradiation wavelengths, λ_FEL, for each ice.

Ice	N_CO (10¹⁵ molecules cm⁻²)	N_PHP (10¹⁵ molecules cm⁻²)	Irradiation wavelength λ_FEL (µm)
CO:PHP mixed	19.1 ± 0.2	2.0 ± 0.4	4.02, 3.42, 4.67
CO/PHP layered	18.47 ± 0.01	1.7 ± 0.1	3.42, 4.67

Notes. The layered system has CO on top of PHP. Column density values are averaged over the irradiation spots on the sample with the errors reflecting the standard deviation. No band strength uncertainty has been taken into account.

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