Modified Temperature-Anisotropy Instability Thresholds in the Solar Wind

Details Modified Temperature-Anisotropy Instability Thresholds in the Solar Wind Modified Temperature-Anisotropy Instability Thresholds in the Solar Wind

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvl.107t1102s&link_type=abstract

Physical Review Letters, vol. 107, Issue 20, id. 201102

Physics

Magnetohydrodynamics And Plasmas, Plasma Turbulence, Solar Wind Plasma, Sources Of Solar Wind

Scientific paper

The proton and electron temperature anisotropies in the solar wind are constrained by the instability thresholds for temperature-anisotropy-driven kinetic plasma instabilities. The modifications to the marginal instability conditions from accounting for the influence of damping connected with the collisional effects in the solar wind plasma are calculated for right- and left-handed polarized parallel propagating Alfvén waves and mirror and firehose fluctuations. These modifications provide tighter threshold constraints compared to the marginal thresholds but do not fully explain the observations at small values of the parallel plasma beta.

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