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3D electron‐acoustic solitary waves introduced by phase space electron vortices in magnetized space plasmas
Author(s) -
Shukla P. K.,
Mamun A. A.,
Eliasson B.
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl019533
Subject(s) - physics , electron , acoustic wave , plasma , magnetosphere , vortex , atomic physics , ion acoustic wave , electric field , computational physics , mechanics , optics , quantum mechanics
We derive a multi‐dimensional nonlinear equation for electron‐acoustic waves in magnetized plasmas composed of stationary ions, magnetized cold electrons with a significant fraction of electron beams, and magnetized hot electrons which have a non‐isothermal vortex‐like distribution. We find three‐dimensional (3D) electron‐acoustic solitary waves which have a stronger nonlinearity (in comparison with that associated with the traditional harmonic generation) due to the trapping of hot electrons in the localized electron‐acoustic wave potential. The relevance of our investigation to nonlinear structures (e.g., the bipolar parallel electric fields) in the Earth's magnetosphere is discussed.