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

• 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
• ISSN: 2169-9380; 2169-9402
• DOI: 10.1002/2015JA022138

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