Lyα irradiation of superhydrogenated coronene films: Implications for h2 formation

V. Mennella; T. Suhasaria; L. Hornekær; J. D. Thrower; G. Mulas

doi:10.3847/2041-8213/abddb9

Lyα irradiation of superhydrogenated coronene films: Implications for h₂ formation

V. Mennella^*, T. Suhasaria, L. Hornekær, J. D. Thrower, G. Mulas

^*Corresponding author for this work

Department of Physics and Astronomy - Center for Interstellar Catalysis

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

1 Citation (Scopus)

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.

Original language	English
Article number	L18
Journal	Astrophysical Journal Letters
Volume	908
Issue	1
Number of pages	7
ISSN	2041-8205
DOIs	https://doi.org/10.3847/2041-8213/abddb9
Publication status	Published - Feb 2021

Access to Document

10.3847/2041-8213/abddb9

Cite this

@article{8e66f702dd1b457abd9dac46f51f9017,

title = "Lyα irradiation of superhydrogenated coronene films: Implications for h2 formation",

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. ",

author = "V. Mennella and T. Suhasaria and L. Hornek{\ae}r and Thrower, {J. D.} and G. Mulas",

note = "Publisher Copyright: {\textcopyright} 2021. The American Astronomical Society.",

year = "2021",

month = feb,

doi = "10.3847/2041-8213/abddb9",

language = "English",

volume = "908",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "1",

}

TY - JOUR

T1 - Lyα irradiation of superhydrogenated coronene films

T2 - Implications for h2 formation

AU - Mennella, V.

AU - Suhasaria, T.

AU - Hornekær, L.

AU - Thrower, J. D.

AU - Mulas, G.

PY - 2021/2

Y1 - 2021/2

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85101410003&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/abddb9

DO - 10.3847/2041-8213/abddb9

M3 - Journal article

AN - SCOPUS:85101410003

SN - 2041-8205

VL - 908

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L18

ER -

Lyα irradiation of superhydrogenated coronene films: Implications for h₂ formation

Abstract

Access to Document

Other files and links

Fingerprint

Cite this