Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments

Details Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....46..447m&link_type=abstract

EAS Publications Series, Volume 46, 2011, pp.447-452

Physics

1

Scientific paper

An active carbon chemistry is observed at the border of photo-dissociation regions (PDRs), involving small hydrocarbons, polycyclic aromatic hydrocarbon (PAH) macromolecules and evaporating very small grains (VSGs). In this context, we aim at quantifying the physical and chemical evolution of PAHs (hydrogenation and charge states, aggregation, and complexation with heavy atoms) as a function of the local physical conditions (radiation field, temperature, density, abundances of atomic and molecular hydrogen, electrons and heavy atoms). We have developed a numerical model that follows the time dependency of the abundance and internal energy of each species. In this paper, we use this model to calculate the hydrogenation and charge states of coronene C24H12 as an interstellar PAH prototype. We take advantage of recent results on photodissociation and reaction rates and provide guidelines for future laboratory studies. Reaction rates of coronene-derived radical cations with H and H2 are found to be sufficiently constrained by experiments, whereas the absence of experimental data for neutral species is critical.

Affiliated with

Also associated with

No associations

Rating

Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling the physical and chemical evolution of PAHs and PAH-related species in astrophysical environments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-863084