Alfvén waves in space and astrophysical dusty plasmas

Jatenco‐Pereira, V.; Chian, Abraham C.‐L.; Rubab, N.

doi:10.5194/npg-21-405-2014

Cited by 14 publications

(8 citation statements)

References 105 publications

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“…( 15)-( 17) are good approximations for the resonance frequencies in three-component plasmas. 15), (16), and (17) We note that this study neglects the effects of the thermal pressure on the plasma waves. Compared with the usual fast, Alfvén, and slow modes in electron and proton plasmas [24] , the magnetosonic waves carried by the heavy charged particles are driven by the thermal pressure of the heavy charged particles and magnetic pressure.…”

Section: Discussionmentioning

confidence: 99%

Low-Frequency Waves in Cold Three-Component Plasmas

Tang

Zhao

et al. 2016

Plasma Sci. Technol.

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The dispersion relation and electromagnetic polarization of the plasma waves are comprehensively studied in cold electron, proton, and heavy charged particle plasmas. Three modes are classified as the fast, intermediate, and slow mode waves according to different phase velocities. When plasmas contain positively-charged particles, the fast and intermediate modes can interact at the small propagating angles, whereas the two modes are separate at the large propagating angles. The near-parallel intermediate and slow waves experience the linear polarization, circular polarization, and linear polarization again, with the increasing wave number. The wave number regime corresponding to the above circular polarization shrinks as the propagating angle increases. Moreover, the fast and intermediate modes cause the reverse change of the electromagnetic polarization at the special wave number. While the heavy particles carry the negative charges, the dispersion relations of the fast and intermediate modes are always separate, being independent of the propagating angles. Furthermore, this study gives new expressions of the three resonance frequencies corresponding to the highly-oblique propagation waves in the general three-component plasmas, and shows the dependence of the resonance frequencies on the propagating angle, the concentration of the heavy particle, and the mass ratio among different kinds of particles.

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Section: Discussionmentioning

confidence: 99%

Low-Frequency Waves in Cold Three-Component Plasmas

Tang

Zhao

et al. 2016

Plasma Sci. Technol.

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“…Moreover, the presence of charged dust particles also modifies the scenario of the Alfven waves [23][24][25][26][27][28] by enhancing their frequency, modifying the dispersion relation, and showing a damping effect due to dust charge fluctuation dynamics. Jatenco-Pereira et al [29] showed the sensible modification of the dispersion relation of Alfvén waves in the presence of dust and superthermal particles. They analysed the competition between different damping processes of kinetic Alfven waves and Alfven cyclotron waves and their applications in the auroral regions of space plasmas, stellar winds, and astrophysical plasmas.…”

Section: Introductionmentioning

confidence: 99%

Generation of an obliquely propagating shear alfven wave in dusty plasma by an ion beam

Gupta

Sharma

2023

Contributions to Plasma Physics

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Ion beam-dusty plasma interaction leads to significant changes in the dispersion relation of shear Alfven wave depending on the beam, dust grain, and plasma parameters. Hydrogen ion beam particles interact with the shear Alfven wave via cyclotron interaction when they counter-propagate with the wave and they can also interact with the co-propagating wave via Cerenkov interaction. The interaction causes beam as well as plasma density fluctuations and gives rise to perpendicular currents. We have analytically obtained the dispersion relation and the growth/damping rate expressions for obliquely propagating shear Alfven waves in dusty plasma. The effect of beam velocity, magnetic field, wave number, dust particle density, and dust charge fluctuations are discussed. It is shown that both the wave frequency and the maximum growth rate decrease with an increase in beam velocity and the variations are different for parallel and perpendicular wave numbers. The dust particles enhance the frequency and maximum growth rate while the dust charge fluctuations induce damping. The results are in good agreement with the experimental observations.

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“…Several observations by various satellite missions have reported the presence of velocity distributions that exhibit non‐Maxwellian features [ 38,39 ] and can be modelled by generalized Lorentzian profiles, in which high‐energy tails due to the presence of energetic particles appear. [ 40–42 ] Such superthermal plasmas are found in the magnetospheres of various planets, e.g. Earth, Mercury, and Saturn.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear ion acoustic waves in dissipative and dispersive magneto‐rotating relativistic plasmas with two temperature superthermal electrons

Abbasi

Masood

Khan

et al. 2020

Contributions to Plasma Physics

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A study has been presented for the nonlinear features of ion-acoustic (IA) shock waves in a magnetorotating plasma consisting of warm viscous streaming ions along with kappa-distributed electrons having two different temperatures. In this regard, we have employed the reductive perturbation technique to derive the Zakharov-Kuznetsov-Burgers (ZKB) equation that governs the dynamics of IA shock waves. The solution obtained by the hyperbolic tangent method has been shown to depend on various plasma parameters such as spectral index (c), density fraction (f), effective rotation frequency (Ω c), ion kinematic viscosity (o), and temperature ratio (). In the limiting case when dissipative coefficient D → 0, we have also examined the solitary potential distributions, which are the solutions of Zakharov Kuznetsov (ZK) equation. It is found that both rarefactive and compressive structures exist for the system under consideration. The transition in the nature of such profiles is due to the enhancement in the density of cold electrons. The importance of present theoretical investigations has been carried out with regard to Saturn's magnetosphere, where two temperature superthermal electron populations have been observed by various satellite missions. K E Y W O R D S ion acoustic waves, kappa distribution, nonthermal plasma, shocks/solitons, two electron thermal population 1 INTRODUCTION Ion acoustic waves (IAW) are one of the fundamental low-frequency modes in a plasma and are associated with plasma compression during their propagation. [1,2] Various plasmas allow propagation of several types of nonlinear waves, e.g. solitons and shocks. [3,4] The former can trap plasma particles and cause a redistribution of energy and momentum. These structures arise due to the interplay between wave dispersion and nonlinearity as described by the Korteweg de Vries (KdV) equation. The system becomes more interesting in the presence of dissipation and, for weakly nonlinear 1-D systems, is depicted by Korteweg-de Vries-Burgers (KdVB) Equation. [5,6] Such dissipation is mainly caused by interparticle collisions, ion kinematic viscosity, and/or wave-particle interaction. The dissipation term is often recognized as the Burgers term and supports formation of shock waves. [7-12]

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Alfvén waves in space and astrophysical dusty plasmas

Cited by 14 publications

References 105 publications

Low-Frequency Waves in Cold Three-Component Plasmas

Low-Frequency Waves in Cold Three-Component Plasmas

Generation of an obliquely propagating shear alfven wave in dusty plasma by an ion beam

Nonlinear ion acoustic waves in dissipative and dispersive magneto‐rotating relativistic plasmas with two temperature superthermal electrons

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