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Electromagnetic waves in self-gravitating, strongly coupled magnetized degenerate plasma

Published online by Cambridge University Press:  17 November 2011

A. A. MAMUN ,
P. K. SHUKLA  and
D. A. MENDIS
A. A. MAMUN
Affiliation:
Department of Physics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh ([email protected])
P. K. SHUKLA
Affiliation:
International Centre for Advanced Studies in Physical Sciences, Faculty of Physics & Astronomy, Ruhr-Universität Bochum, D-44780 Bochum, Germany Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA 92093, USA
D. A. MENDIS
Affiliation:
Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA 92093, USA
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Abstract

The linear propagation of the low-frequency (compared to the electron gyrofrequency) electromagnetic (EM) waves in a self-gravitating, strongly coupled magnetized plasma with ultra-relativistic degenerate electron fluid is investigated. It is found that the dispersion properties of the EM waves and stability criteria for such a degenerate plasma are significantly modified by the effects of the ultra-relativistic degenerate electron pressure, strong co-relation among extremely dense ion fluid, and the direction of the EM wave propagation relative to the ambient magnetic field direction. The relevance of our investigation to stability of white dwarf stars is briefly discussed. It is particularly seen here that the cores of such stars are stable for the class of gravito-electrodynamic waves that are analyzed for the characteristic ranges of relevant physical parameters.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 2 , April 2012 , pp. 143 - 148
Copyright
Copyright © Cambridge University Press 2011

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