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Lyα Irradiation of Superhydrogenated Coronene Films: Implications for H2 Formation

Journal
Date Issued
2021
Author(s)
•
•
Hornekær, L.
•
Thrower, J. D.
•
MULAS, Giacomo
DOI
Abstract
We present the results of an experimental study of the interaction of Lyα photons with superhydrogenated coronene films. The effects of ultraviolet (UV) irradiation have been analyzed with infrared spectroscopy. The spectral changes provide evidence for UV photodestruction of the C-D bonds of the superhydrogenated coronene with a cross section of 8 ± 2 × 10-20 cm2. The comparison of our experimental result with the prediction from theoretical modeling suggests an extension of the region inside photodissociation regions where superhydrogenated coronene can survive and contribute to H2 formation. H2 formation through abstraction in superhydrogenated coronene dominates over direct H2 loss induced by UV photodestruction.
Volume
908
Issue
1
Start page
L18
Uri
Url
Issn Identifier
2041-8205
Ads BibCode
2021ApJ...908L..18M
Rights
open.access