Potential of grains in astrophysical media - Influence of the surface state (porosity)

Details Potential of grains in astrophysical media - Influence of the surface state (porosity) Potential of grains in astrophysical media - Influence of the surface state (porosity)

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...214..327m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 214, no. 1-2, April 1989, p. 327-330.

Astronomy and Astrophysics

Astrophysics

3

Cosmic Dust, Cosmic Plasma, Interplanetary Medium, Stellar Winds, Electron Bombardment, Electron Emission, Interstellar Chemistry, Porosity, Secondary Emission

Scientific paper

Porous or fluffy grains are commonly found in the interplanetary medium and are suspected to be present in the interstellar medium or stellar winds. Porosity can strongly enhance the secondary electron emission resulting from electron bombardment through a different emission process usually neglected for smooth grain surfaces. A quite different behavior of dust grains can result when they are embedded in astrophysical plasmas. In particular electrostatic breaking can occur less easily in hot plasmas and more easily in cold (and tenuous) plasmas, with consequences for grain size distributions. Interstellar chemistry can also be modified.

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