Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aspc..309..453w&link_type=abstract
Astrophysics of Dust, ASP Conference Series, Vol. 309,Proceedings of the conference held 26-30 May, 2003 in Estes Park, Colorado
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
Cosmic grains are subjected to various electrical charging mechanisms and the resulting non-zero grain charge has several important astrophysical consequences. I briefly discuss the various physical processes that can contribute to grain charging and describe a number of potential applications. Then, I focus on grain charging in H I regions, where the dominant charging processes are starlight-induced photoelectric emission and collisions with gas-phase electrons and ions. I discuss recent progress in the quantitative estimation of the charging rates and point out areas where improvements are needed. Finally, I discuss one important application, namely, grain-assisted electron-ion recombination.
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