Journal
PHYSICS LETTERS A
Volume 323, Issue 1-2, Pages 110-121Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2004.01.065
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A linear theory of dust acoustic (DA) and dust ion-acoustic (DIA) waves in a self-gravitating collisional dusty plasma contaminated by variable-charge impurities is presented for a self-consistent closed system. The ion-drag force arising from the ion orbital motion as well as momentum transfer from all the ions and self-gravitation are taken into consideration. The physical processes, viz., dust-charge relaxation, ionization, recombination and collisional dissipations are also taken into account self-consistently. The generalized dispersion relation describing the coupling of the acoustic modes with the dust-charge relaxation mode (CRM) and damping of the waves is derived and analyzed numerically. (C) 2004 Elsevier B.V. All rights reserved.
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