Gravitational instability of a heat-conducting plasma

Details Gravitational instability of a heat-conducting plasma Gravitational instability of a heat-conducting plasma

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.179..313b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 179, no. 2, May 1991, p. 313-320.

Astronomy and Astrophysics

Astrophysics

4

Anisotropic Media, Gravitational Fields, Heat Transfer, Magnetohydrodynamic Stability, Plasma Conductivity, Collisionless Plasmas, Fourier Series, Magnetohydrodynamic Waves, Wave Propagation

Scientific paper

The gravitational instability of an infinite anisotropic heat-conducting plasma is studied. It is found that, for the case of parallel propagation, the inclusion of heat-conduction terms in the fluid equations, in general, leads to overstability of the system, whereas the transverse propagation remains unaffected. The dispersion relation corresponding to the parallel propagation is solved numerically and it is found that except for a range of wave numbers, the system is overstable. It is also found that in the limit of vanishing zeroth-order heat flux, the condition for gravitational instability is similar to the Jeans condition for instability for an isotropic plasma.

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