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Kinetic treatment of gravitational-Coulomb coupling in the Jeans model

Published online by Cambridge University Press:  01 August 2008

A. I. ERSHKOVICH  and
P. L. ISRAELEVICH
A. I. ERSHKOVICH
Affiliation:
Department of Geophysics and Planetary Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978 Tel Aviv, Israel (alex@luna.tau.ac.il)
P. L. ISRAELEVICH
Affiliation:
Department of Geophysics and Planetary Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, 69978 Tel Aviv, Israel (alex@luna.tau.ac.il)
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Abstract

The conventional Jeans model is modified by the addition of electric charging. The standard procedure of kinetic treatment results in a dispersion relation which describes both the Jeans instability and Langmuir oscillations, with the analog of Landau damping. Coulomb interactions tend to stabilize the Jeans instability diminishing the growth rate whereas the gravitational field tends to destabilize Langmuir oscillations. Collisions between particles are taken into account.

Type
Papers
Information
Journal of Plasma Physics , Volume 74 , Issue 4 , August 2008 , pp. 515 - 518
Copyright
Copyright © Cambridge University Press 2007

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