Title: Counterstreaming magnetized plasmas with kappa distributions - II. Perpendicular wave propagation
Authors: Lazar, Marian ×
Tautz, R. C
Schlickeiser, R
Poedts, Stefaan #
Issue Date: Oct-2009
Publisher: Wiley-blackwell publishing, inc
Series Title: Monthly notices of the royal astronomical society vol:401 issue:1 pages:362-370
Abstract: The analysis of the stability and the dispersion properties of a counterstreaming plasma system with kappa distributions are extended here with the investigation of perpendicular instabilities. Purely growing filamentation (Weibel-like) modes propagating perpendicular to the background magnetic field can be excited in streaming plasmas with or without an excess of parallel temperature. In this case, however, the effect of suprathermal tails of kappa populations is opposite to that obtained for parallel waves: the growth rates can be higher and the instability faster than for Maxwellian plasmas. The unstable wavenumbers also extend to a markedly larger broadband making this instability more likely to occur in space plasmas with anisotropic distributions of kappa-type. The filamentation instability of counterstreaming magnetized plasmas could provide a plausible mechanism for the origin of two-dimensional transverse magnetic fluctuations detected at different altitudes in the solar wind.
ISSN: 0035-8711
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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