Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.139..337c&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 139, no. 2, Dec. 1987, p. 337-352.
Astronomy and Astrophysics
Astrophysics
2
Gravitational Fields, Modal Response, Plasma Composition, Plasma-Electromagnetic Interaction, H Ii Regions, Interstellar Gas, Molecular Clouds, Perturbation Theory, Wave Propagation
Scientific paper
The gravitational stability of a magnetized self-gravitating two-component plasma of finite conductivity flowing through a porous medium has been investigated, taking into account the effects of magnetic field, porosity, viscosity, finite conductivity, and neutral gas friction. Dispersion relations have been obtained from linearized equations using normal mode analysis. Jean's criterion is shown to determine the stability of the system. It is noted that Jean's expression is modified due to the magnetic field and the porosity for the case of transverse wave propagation in a perfectly conducting plasma. Collisional frequency, viscosity, and permeability of the porous medium are found to produce a damping effect on the stability of the system.
Chhajlani R. K.
Vaghela D. S.
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