Studying the interaction between VUV photons and PAHs in relevant astrophysical conditions
A Marciniak (IRAP, LCAR), A Bonnamy (IRAP), S Zamith (LCAR), L, Nogu\`es (IRAP), O Coeur-Joly (IRAP), D Murat (IRAP), P Moretto-Capelle, (LCAR), J.-M l'Hermite (LCAR), G Mulas (OAC, IRAP), C Joblin (IRAP)
TL;DR
This paper presents experimental research on how VUV photons interact with PAHs under astrophysical conditions, revealing fragmentation pathways and stability relevant to space chemistry.
Contribution
It introduces the PIRENEA and PIRENEA 2 setups for studying PAH photodissociation and extends capabilities to larger systems like PAH clusters.
Findings
Studied fragmentation pathways of PAHs under VUV irradiation.
Assessed stability of PAHs with aliphatic bonds in space-like conditions.
Enabled future research on gas-nanograin-photon interactions.
Abstract
PIRENEA and PIRENEA 2 are experimental setups dedicated to the study of fundamental molecular processes involving species of astrochemical interest. The coupling of a VUV source to PIRENEA has allowed us to study the fragmentation pathways and stability of polycyclic aromatic hydrocarbons (PAHs) containing aliphatic bonds under conditions relevant for astrophysical photodissociation regions. PIRE-NEA 2 will open the possibility to extend these studies to larger systems such as PAH clusters, and more generally to study gas-nanograin-photon interactions.
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