Ionization and Dissociation of PAH by Stellar Winds Application to H2 Emission from Coronene in HD44179

29th International Conference on Photonic, Electronic, and Atomic Collisions

Champeaux, J.-P.^1 ; Moretto-Capelle, P.^1 ; Cafarelli, P.^1 ; Deville, C.^1 ; Sence, M.^1 ; Casta, R.^1

Laboratoire Collisions Agrégats et Réactivité, CNRS-UMR 5589, Université Paul Sabatier Toulouse III, 118 Route de Narbonne, Toulouse Cedex 9

F-31062, France^1

关键词: Coronene;    Induced dissociation;    Molecular hydrogen;    Stellar wind;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032120/pdf
DOI  :  10.1088/1742-6596/635/3/032120

来源: IOP

【 摘 要 】

Recent results on dissociation of coronene by keV protons are presented and applied to the astrophys- ical context of HD44179 compact nebulae. We show that coronene dissociation by stellar wind can induce strong neutral molecular hydrogen emission and more generally, that stellar wind induced dissociation of carbonated molecules like PAHs inside compact nebulae (i.e before the astro-pause) can play an important role in the complex physico-chemistry of the nebulae media which could be competitive with other photodissociaiton or photochemistry mechanisms.