Ion-acoustic vortex formation in a non-uniform two-electron-temperature magnetoplasma with sheared ion flow

We have investigated some linear as well as nonlinear properties of ion-acoustic wave (IAW) propagation in a non-uniform two-electron-temperature magnetoplasma in the presence of ion-sheared flows. In the linear limit, new dispersion relation has been derived and analyzed in some interesting limitin...

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Bibliographic Details
Published inJournal of plasma physics Vol. 78; no. 1; pp. 65 - 69
Main Authors BATOOL, NAZIA, NAEEM, ISMAT, MIRZA, ARSHAD M., MASOOD, W.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.02.2012
Subjects
Constraining
Dispersions
Fluid dynamics
Fluid flow
Fluid mechanics
Magnetic fields
Nonlinearity
Plasma physics
Propagation
Space environment
Wave propagation
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Summary:We have investigated some linear as well as nonlinear properties of ion-acoustic wave (IAW) propagation in a non-uniform two-electron-temperature magnetoplasma in the presence of ion-sheared flows. In the linear limit, new dispersion relation has been derived and analyzed in some interesting limiting cases. It is shown that ion-sheared flow can drive the IAW unstable under a certain limit.Whereas, in the nonlinear case, dipolar and vortex street type solutions can appear. It is observed that by choosing some typical parameters of Earth's auroral region, the scalelength of the nonlinear structures are significantly modified. The present investigation might be very useful to explain various types of nonlinear structure formation which has been observed in space environments where two-electron-temperature plasma exist.
Bibliography:ObjectType-Article-2
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content type line 23
ISSN:0022-3778
1469-7807
DOI:10.1017/S0022377811000390