Electron kinetic firehose instability

Details Electron kinetic firehose instability Electron kinetic firehose instability

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jgr...10527377l&link_type=abstract

Journal of Geophysical Research, Volume 105, Issue A12, p. 27377-27386

Astronomy and Astrophysics

Astrophysics

19

Solar Physics, Astrophysics, And Astronomy

Scientific paper

The linear dispersion equation describing electromagnetic waves propagating in a homogeneous electron-proton plasma along arbitrary directions relative to the direction of the background magnetic field is solved numerically for bi-Maxwellian particle distributions. It is found that in the presence of an electron temperature anisotropy T⊥2), several purely growing modes (zero real frequency) and a quasi-parallel electron firehose instability develop. While the quasi-parallel mode is unstable for both parallel and oblique propagation, the zero frequency modes are unstable only for oblique propagation. Comparison of these modes further shows that the propagation angle for maximum growth rate and the maximum growth rate are larger for the purely growing modes than the quasi-parallel electron firehose while the threshold is lower. Potential application of the kinetic electron firehose instability to the slow solar wind is briefly discussed.

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