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Dispersive magnetized waves in the solar wind plasma

Published online by Cambridge University Press:  04 June 2010

B. DASGUPTA ,
DASTGEER SHAIKH  and
P. K. SHUKLA
B. DASGUPTA
Affiliation:
Center for Space Physics and Aeronomic Research (CSPAR), University of Alabama at Huntsville, Huntsville, AL 35805, USA
DASTGEER SHAIKH
Affiliation:
Center for Space Physics and Aeronomic Research (CSPAR), University of Alabama at Huntsville, Huntsville, AL 35805, USA Department of Physics, University of Alabama at Huntsville, Huntsville, AL 35805, USA ([email protected])
P. K. SHUKLA
Affiliation:
Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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Abstract

We derive a generalized linear dispersion relation of waves in a strongly magnetized, compressible, homogeneous and isotropic quasi-neutral plasma. Starting from a two-fluid model, describing distinguishable electron and ion fluids, we obtain a six-order linear dispersion relation of magnetized waves that contains effects due to electron and ion inertia, finite plasma beta and angular dependence of phase speed. We investigate propagation characteristics of these magnetized waves in a regime where scale lengths are comparable with electron and ion inertial length scales. This regime corresponds essentially to the solar wind plasma, where length scales, comparable with ion cyclotron frequency, lead to dispersive effects. These scales in conjunction with linear waves present a great deal of challenges in understanding the high-frequency, small-scale dynamics of turbulent fluctuations in the solar wind plasma.

Type
Papers
Information
Journal of Plasma Physics , Volume 77 , Issue 3 , June 2011 , pp. 357 - 365
Copyright
Copyright © Cambridge University Press 2010

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