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Dust-acoustic waves in self-gravitating dusty plasmas with fluctuating dust charges

Published online by Cambridge University Press:  01 July 1997

FRANK VERHEEST ,
P. K. SHUKLA ,
N. N. RAO  and
PETER MEURIS
FRANK VERHEEST
Affiliation:
Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B–9000 Gent, Belgium
P. K. SHUKLA
Affiliation:
Theoretische Physik IV, Ruhr–Universität Bochum, D–44780 Bochum, Germany
N. N. RAO
Affiliation:
Permanent address: Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India. Theoretische Physik IV, Ruhr–Universität Bochum, D–44780 Bochum, Germany
PETER MEURIS
Affiliation:
Belgisch Instituut voor Ruimte-Äeronomie, Ringlaan 3, B–1180 Ukkel, Belgium
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Abstract

It is shown that the recently published work of Pandey and Dwivedi [J. Plasma Phys. 55, 395 (1996)] dealing with dust-acoustic waves in a self-gravitating unmagnetized dusty plasma is erroneous. This is demonstrated on the basis of a dispersion relation in which gravitational and electrostatic forces are kept on an equal footing. Furthermore, a general linear dispersion relation for the dust-acoustic and dust-ion acoustic waves in self-gravitating dusty plasmas is obtained, taking into account the dust-charge perturbations. Specific results for limiting cases are discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 58 , Issue 1 , July 1997 , pp. 163 - 170
Copyright
1997 Cambridge University Press

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