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

Abstract

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.

On the stability of two-dimensional modulated electrostatic wavepackets in non-Maxwellian dusty plasma-application in Saturn's magnetosphere

“…Earlier works have shown that the above system (DS-II) occurs in relation with ion acoustic (Nishinari et al 1993) and dust-ion acoustic (Xue 2004) plasmas. On the other hand, DS-I occurs in (un)magnetized dust acoustic (Duan 2004;Saini et al 2016) and electron acoustic (Sen et al 2004) plasmas, etc. Those systems sustain dromion solutions which, rather counter-intuitively, cannot exit in our model.…”

“…Typical plasma parameters corresponding to planetary rings for dusty plasma are: 0 = (10 13 − 10 16 ) −3 , 0 = (10 13 − 10 16 ) −3 , = 10 3 , = 10 13 −3 , = 50 eV, = 0.05 eV (Goertz 1989). Modulated wavepackets are ubiquitous in space; however, the generalization of the standard theory for modulational processes (Kourakis & Shukla 2005) to higher dimensionality (Davey & Stewartson 1974;Nishinari et al 1993Nishinari et al , 1994Fokas & Santini 1989;Duan 2004Duan , 2003Sen et al 2004;Xue 2004;Saini et al 2016) is not entirely understood. The transverse perturbations are supported by higher dimensions.…”

Effects of double spectral electron distribution and polarization force on dust acoustic waves in a negative dusty plasma

“…The associated particles are then called the superthermal particles as a result of the extreme amount of energy the particle acquired. [9] Vasyliunas [23] was the first to introduce the kappa distribution function with the spectral index . To explain its relation with the Maxwellian distribution, let → ∞.…”

“…[ 1,6,7 ] Dust acoustic (DA) mode is one of these eigenmodes that has been initiated theoretically in unmagnetized plasma by Rao et al [ 1 ] and later it has been verified experimentally by Barkan et al [ 8 ] Few decades ago, it was theoretically investigated that the dust acoustic wave (DAW) is present in an electron‐ion‐dust plasma. [ 9 ] Several space observations have emphasized the presence of nonlinear features in space domain. Later, these observations were interpreted by Seyler et al [ 10 ] by formulating one‐dimensional model for the detected solitary waves and by studying the corresponding steady state wave solutions.…”

“…The associated particles are then called the superthermal particles as a result of the extreme amount of energy the particle acquired. [ 9 ]…”