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Towards disentangling photodesorption and photodissociation in astronomical ice analogues

Published online by Cambridge University Press:  12 October 2020

Michał Bulak Open the ORCID record for Michał Bulak [Opens in a new window] ,
Daniel Paardekooper ,
Jordy Bouwman Open the ORCID record for Jordy Bouwman [Opens in a new window] ,
Gleb Fedoseev  and
Harold Linnartz Open the ORCID record for Harold Linnartz [Opens in a new window]
Michał Bulak
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands email: [email protected]
Daniel Paardekooper
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, US
Jordy Bouwman
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands email: [email protected]
Gleb Fedoseev
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands email: [email protected]
Harold Linnartz
Affiliation:
Laboratory for Astrophysics, Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, the Netherlands email: [email protected]
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Abstract

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UV irradiation of ices plays an important role in different inter- and circumstellar environments. Following the absorption of UV photons in ice, two processes compete: photodesorption and photodissociation/chemistry. From an experimental point of view it is very hard to discriminate between photodesorption and photodissociation (and resulting photochemistry). In this work we present our first attempts to distinguish both effects. The performance is demonstrated on the example of CO-ice, known not to dissociate upon UV irradiation, and CH4-ice that does fragment.

Keywords

astrochemistrymethods: laboratorytechniques:molecular processesISM: molecules
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 422 - 424
Copyright
© International Astronomical Union 2020

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