Acceleration of small astrophysical grains due to charge fluctuations

Details Acceleration of small astrophysical grains due to charge fluctuations Acceleration of small astrophysical grains due to charge fluctuations

2010-03-12

arxiv.org/abs/1003.2633v2

Astrophys. J. 723:612-619, 2010

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

8 pages, 2 figures, revised version, submitted to Astrophysical Journal

Scientific paper

We discuss a novel mechanism of dust acceleration which may dominate for particles smaller than $\sim0.1~\mu$m. The acceleration is caused by their direct electrostatic interactions arising from fluctuations of grain charges. The energy source for the acceleration are the irreversible plasma processes occurring on the grain surfaces. We show that this mechanism of charge-fluctuation-induced acceleration likely affects the rate of grain coagulation and shattering of the population of small grains.

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