Electromagnetic electron whistler-cyclotron instability in bi-Kappa distributed plasmas

Abstract

Context. Recent studies of the electromagnetic electron whistler-cyclotron instability in anisotropic bi-Kappa distributed plasmas claim that the instability threshold conditions do not depend on the power index, κe, of the electron distribution function, but that the maximum growth rate (γm) strongly depends on this parameter. But these two statements contradict each other because the instability threshold conditions are derived with respect to the threshold levels of the maximum growth rates (e.g.,γm/Ω = 10-1,10-2, etc.).