Physics – Plasma Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dppgo1006m&link_type=abstract
American Physical Society, 42nd Annual Meeting of the APS Division of Plasma Physics combined with the 10th International Congre
Physics
Plasma Physics
Scientific paper
The main focus of this paper is on the oscillation branch, which corresponds to whistler drift wave in dusty plasma. Dust particles (grains) often exist in significant amounts in space and astrophysical plasma. Most of grains are charged. On the astrophysical temporal and spatial scales the plasma is quasi-neutral, besides the electrons and ions are magnetized while the dust particles may be non-magnetized. Both whistler and magnetic sound waves exist in non-homogeneous dusty plasma. It should be emphasized that the ion-electron drift velocities could be much greater than the current velocity which is c curl(B/4πen_i). The spatial interval of applicability of the dusty plasma Hall MHD covers the astrophysical objects in a wide range of 10^13--10^17 cm. The nonlinear analysis of the whistler drift mode shows that the local frozen-in condition could be broken. If the total mass of grains exceeds the total ion mass, the charged dust particles give rise to the electric field which is able to separate the dust plasma from the most of drifting away electron-ion plasma with frozen-in magnetic field. This break of the MHD frozen-in condition can affect the spectrum of cosmic turbulence and magnetic field reconnection (annihilation).
Milikh Gennady M.
Rudakov L. I.
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