Grain charging in H II regions

Details Grain charging in H II regions Grain charging in H II regions

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..34..137m&link_type=abstract

(Symposium on Solid State Astrophysics, Cardiff, Wales, July 9-12, 1974.) Astrophysics and Space Science, vol. 34, Apr. 1975, p.

Astronomy and Astrophysics

Astrophysics

10

Cosmic Plasma, H Ii Regions, Interstellar Matter, Particle Charging, Stellar Radiation, Aluminum Oxides, Charge Transfer, Dielectrics, Electron Density (Concentration), Graphite, Hydrogen Ions, Nebulae, Particle Motion, Radiation Pressure, Silicates

Scientific paper

Equilibrium grain potentials have been calculated as a function of radial position and for a wide range of electron densities in H II regions ionized by stars of spectral type O5 and Bo. Results are presented for both graphite (low yield photoemitter) and aluminum oxide (high yield photoemitter) for which laboratory photoemission data has been obtained. The results for aluminium oxide should approximate the behavior expected of dielectric grains - e.g., silicates which may be present in H II regions. The importance of charging is discussed in relation to the growth and motion of grains in these regions.

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