Oblique modulation of electron acoustic waves in nonextensive plasma

Abstract

In this paper, we have studied the oblique modulation of electron acoustic (EA) waves and formation and properties of envelope solitons in three component plasma consisting of cold electrons, nonextensive hot electrons, and stationary ions. To study the stability criteria of waves, the nonlinear Schrödinger equation (NLSE) is derived. The numerical calculations of the NLSE show the variation of the stability region with different plasma parameters. It reveals that the stability criteria of EA waves depend on the modulation angle θ. The effect of nonextensive parameter q and electron temperature ratio σ on the formation of EA wave envelope excitations has been studied in detail, and the findings obtained here will be beneficial for further astrophysical investigations.