On the correlation of the abundances of HNCO and NH2CHO: Advantages of solid para-H2to study astrochemical H-atom addition and abstraction reactions

György Tarczay, Karolina Haupa, Yuan Pern Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In dense interstellar clouds that are shielded from high-energy radiation (e.g., UV photons or cosmic rays), H-atom addition and abstraction reactions that take place on grain surfaces play principal roles in the synthesis or decomposition of complex organic molecules (COMs). These reactions are extensively investigated with laboratory experiments by bombarding astrophysical analogue ices with a beam of low-temperature H atoms. Here we demonstrate that, although 2-4 K solid para-H2 does not represent a typical environment of the surface of interstellar grains, para-H2 matrix isolation combined with IR spectroscopy is a complementary tool to sensitively detect astrochemical hydrogenation and dehydrogenation processes.

Original languageEnglish
Pages (from-to)394-396
Number of pages3
JournalProceedings of the International Astronomical Union
DOIs
StateAccepted/In press - 2020

Keywords

  • astrochemistry
  • ISM: Clouds
  • molecular processes

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