Effect of electron temperature on small-amplitude electron acoustic solitary waves in non-planar geometry

Bansal, Sandeep; Aggarwal, Munish; Gill, Tarsem Singh

doi:10.1007/s12036-018-9519-4

Cited by 8 publications

(1 citation statement)

References 44 publications

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“…Collisionless and correlated particle systems, such as space plasmas, are characterized by non-Maxwellian distributions. Although the nonthermal model proposed by Cairns et al [15] explains the density depletion observed by the on-board instruments of the Freja [16] and Viking satellites [2,17], an important distribution studied by a number of researchers [18][19][20][21][22][23][24][25][26][27][28] is the kappa function characterized by the spectral index κ. κ-distribution improves the underpinnings of our understanding of astrophysical and space plasmas. Understanding the statistical origin of κ-distributions within the statistical frame has been the cornerstone of important theoretical developments.…”

Section: Introductionmentioning

confidence: 99%

Oblique modulation of electron acoustic waves in superthermal plasma

Bansal¹,

Gill²,

Aggarwal³

2019

Phys. Scr.

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Theoretical and numerical investigations are presented for the oblique modulation of electron acoustic (EA) waves in three-component plasma consisting of cold electrons, superthermal hot electrons and stationary ions. To study the stability criteria of waves, the nonlinear Schrödinger equation (NLSE) is derived. Analytical and numerical calculations of the NLSE show the variation of the stability region with different plasma parameters. This reveals that the stability criteria of EA waves depend on the modulation angle θ. The effect of the superthermal parameter κ and electron temperature ratio σ on the formation of EA wave envelope excitations is also discussed.

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