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Gravitational Instability of a Rotating Viscous Thermally Conducting Plasma
Author(s) -
Mehta Vijay,
Bhatia P. K.
Publication year - 1989
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150290606
Subject(s) - gyroradius , instability , physics , plasma , mechanics , magnetic field , thermal conductivity , viscosity , two stream instability , condensed matter physics , electrical resistivity and conductivity , gravitational field , classical mechanics , thermodynamics , quantum mechanics
This paper deals with the gravitational instability of an infinite homogeneous viscous rotating plasma of finite electrical conductivity in the combined presence of effects of Hall currents, finite Larmor radius ( FLR ) and thermal conductivity. The ambient magnetic field is assumed to be uniform and acting along the vertical direction. Both longitudinal and transverse modes of wave propagation have been studied. It is shown that Jean's criterion determines the gravitational instability even in the presence of the effects of thermal conductivity, viscosity, finite electrical conductivity, FLR , rotation and Hall currents. Further it is found that while FLR , viscosity and rotation have a stabilizing influence, both the thermal and the electrical conductivities have a destabilizing influence on the gravitational instability of a plasma.