Macroscopic quasilinear theory of parallel electron firehose instability associated with solar wind electrons

• DOI: 10.1063/1.4975007
• Publication Date: 2017-01-27T15:59:58Z
• Authors: M. Sarfraz; P. H. Yoon; Sundas Saeed; G. Abbas; H. A. Shah
• Keywords: 0103 physical sciences; 01 natural sciences; 7. Clean energy

A number of different microinstabilities are known to be responsible for regulating the upper bound temperature anisotropies in solar wind protons, alpha particles, and electrons. In present paper, quasilinear kinetic theory is employed investigate time variation electron response excitation parallel firehose instability homogeneous non-collisional plasma under condition T∥e>T⊥e. By assuming bi-Maxwellian form velocity distribution functions, various moments particle equation taken order reduce macroscopic model which wave-particle interaction incorporated, hence, theory. The threshold instability, empirically constructed as a curve (β∥e,T⊥e/T∥e) phase space, implicit calculation. Even though calculation excludes oblique possess higher growth rate, basic methodology may further extended include such mode. Among findings that dynamically couples electrons implies this important overall dynamics. analysis shows approach eventually incorporated global-kinetic models ions.