Nonlinear coupling of electromagnetic and electron acoustic waves in multi-species degenerate astrophysical plasma

Shatashvili, N. L.; Mahajan, S. M.; Berezhiani, V. I.

doi:10.1063/1.5135959

Title: Nonlinear coupling of electromagnetic and electron acoustic waves in multi-species degenerate astrophysical plasma

Journal Article · 17 January 2020 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5135959 · OSTI ID:1800221

Shatashvili, N. L. ^[1];

^[2]; Berezhiani, V. I. ^[3]

Tbilisi State University (Georgia). Andronikashvili Institute of Physics; University of Texas at Austin
Univ. of Texas, Austin, TX (United States)
Tbilisi State University (Georgia). Andronikashvili Institute of Physics

Nonlinear wave-coupling is studied in a multispecies degenerate astrophysical plasma consisting of two electron species (at different temperatures): a highly degenerate main component plus a smaller classical relativistic flow immersed in a static neutralizing ion background. It is shown that the high frequency electromagnetic waves through their strong nonlinear interactions with the electron-acoustic waves [sustained by a multielectron component (degenerate) plasma surrounding a compact astrophysical object] can scatter to lower frequencies so that the radiation observed faraway will be spectrally shifted downward. It is also shown that, under definite conditions, the electromagnetic waves could settle into stationary solitonic states. It is expected that the effects of such structures may persist as detectable signatures in forms of modulated micropulses in the radiation observed far away from the accreting compact object. Both these effects will advance our abilities to interpret the radiation coming out of the compact objects.

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Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-04ER54742

OSTI ID:: 1800221

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 27; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Nonlinear coupling of electromagnetic and electron acoustic waves in multi-species degenerate astrophysical plasma

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