Dust acoustic dromions in a magnetized dusty plasma with superthermal electrons and ions

An investigation of dust acoustic (DA) dromions in a magnetized dusty plasma consisting of inertial dust fluid, kappa‐type distributed electrons, and ions is presented. Using reductive perturbation technique, we have derived coupled nonlinear evolution equations of (2 + 1) dimensions (called Davey‐S...

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Bibliographic Details
Published in:Journal of geophysical research. Space physics 2016-06, Vol.121 (6), p.5944-5958
Main Authors: Saini, N. S., Ghai, Yashika, Kohli, Ripin
Format: Article
Language:English
Subjects:
Boundary layers
Charged particles
Davey‐Stewartson equation
dromions
Dust
dust acoustic
Dusty plasmas
Earth atmosphere
Electrons
Evolution
Inertial
Ions
kappa distribution
Magnetic fields
Mathematical analysis
Nonlinear equations
Nonlinear evolution equations
Perturbation methods
Physical properties
Plasma
Polar caps
Satellite observation
Strength
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Summary:An investigation of dust acoustic (DA) dromions in a magnetized dusty plasma consisting of inertial dust fluid, kappa‐type distributed electrons, and ions is presented. Using reductive perturbation technique, we have derived coupled nonlinear evolution equations of (2 + 1) dimensions (called Davey‐Stewartson (DS‐I) equations). Hirota bilinear method has been employed to derive the analytical solution of DS‐I equations. The solutions of such equations are exponentially localized and are called dromions. The combined effects of various physical parameters such as superthermality of charged particles, strength of magnetic field, and dust concentration have been studied on the existence regions and propagation properties of DA dromions in context with observations of POLAR satellite in the presence of superthermal particles in polar cap boundary layer region of Earth's atmosphere. Key Points The strength of magnetic field and superthermality of charged particles significantly influence the characteristics of DA dromions The parametric domain for existence of dromions is significantly modified by the variation in superthermality of charged particles Three‐dimensional dromions having very high amplitude are observed
ISSN:2169-9380
2169-9402
DOI:10.1002/2015JA022138