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Telecommunications and Radio Engineering

ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering


pages 93-102

Waves in Magnetized Dusty and Self-Gravitational Plasmas

Victoria V. Yaroshenko

ABSTRACT

Among the external fields acting upon dusty plasmas, magnetic fields stand out. The behavior of dusty and self-gravitational plasmas placed in a magnetic field is given special consideration. The dielectric constant tensor for the self-gravitational magnetized plasma is derived and the eigenwave spectrum analyzed. If the spectrum of grain sizes (masses) is continuous, then anomalous dispersion is observed and the right circular polarized electromagnetic wave is attenuated owing to the dust- cyclotron absorption. In the case of the discrete mass spectrum the bicomponent medium consisting of two grain species, i.e. heavy- and light-weight, is considered. Even this oversimplified model shows quite a number of unusual properties, like an Alfv'en wave with a frequency dependent phase velocity, a new low frequency mode and substantially new conditions for the appearance of hybrid resonances.