Streaming instabilities in multicomponent interstellar clouds

Shan, S. Ali; Saleem, H.; Sajid, M.

doi:10.1063/1.2936268

Cited by 16 publications

(7 citation statements)

References 23 publications

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“…͑22͒ for several parameters which are close to dusty plasma environments in interstellar clouds. [46][47][48] Interstellar dust make up only 1% of the interstellar medium but sometimes there is enough dust to obscure the light from stars behind the dust. The interstellar medium contains carbon, helium, hydrogen, and other gases such as oxygen, nitrogen, and baryonic gas molecules.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Alfvén wave instability in a Lorentzian dusty magnetoplasma

et al. 2010

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This study presents a theoretical approach to analyze the influence of kappa distributed streaming ions and magnetized electrons on the plasma wave propagation in the presence of dust by employing two-potential theory. In particular, analytical expressions under certain conditions are derived for various modes of propagation comprising of kinetic Alfvén wave streaming instability, two stream instability, and dust acoustic and whistler waves. A dispersion relation for kinetic Alfvén-like streaming instability has been derived. The effects of dust particles and Lorentzian index on the growth rates and the threshold streaming velocity for the excitation of the instability are examined. The streaming velocity is observed to be destabilizing for slow motion and stabilizing for fast streaming motions. It is also observed that the presence of magnetic field and superthermal particles hinders the growth rate of instability. Possible applications to various space and astrophysical situations are discussed.

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Section: Resultsmentioning

confidence: 99%

Kinetic Alfvén wave instability in a Lorentzian dusty magnetoplasma

et al. 2010

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“…The nonlinear equation (33) is the well known KdV-Burgers(KDVB) equation and the coefficients A, B and C are the nonlinear, dispersive and dissipative coefficients, respectively.…”

Section: Derivation Of Kdv-burgers Equationmentioning

confidence: 99%

“…So there will be no dissipation and C = 0. In this condition, equation (33) is transformed into Kortewg deVries (KdV) equation.…”

Section: The Kdv Equation and The Solutionmentioning

confidence: 99%

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Investigation of dust ion acoustic shock and solitary waves in a viscous dusty plasma

Goswami

Kausik²

2023

Phys. Scr.

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A viscous dusty plasma containing Kappa-(κ−) distributed electrons,positive warm viscous ions and constant negatively charged dust grains with viscosity have been considered to study the modes of dust-ion-acoustic waves (DIAWs) theoretically and numerically. The derivations and basic features of shock and solitary waves with different plasma parameters like Mach number, finite temperature coefficient, unperturbed dust streaming velocity, kinematic viscosity of dust etc. of this DIAWs mode have been performed. Considering the dynamical equation from Korteweg–de Vries(KdV) equation, a phase portrait has been drawn and the position of saddle point or col. and center have also been discussed. This type of dusty plasma can be found in celestial bodies. The results of this research work can be applied to study the properties of DIAWs in various astrophysical situation where κ-distributive electrons are present and careful modification of the same model can help us to understand the nature of the DIAWs of laboratory plasma as well.

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“…The electrostatic two-stream instabilities in interstellar medium have also been discussed in the presence of two types of dust particles. 13 The zero-order current can also be produced in dusty plasmas if the electron-ion plasma penetrates into another plasma having heavy dust particles. In this case, after transient processes, the electron-ion flow can produce a zeroorder current causing twist in the external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Short scale electrostatic vortices driven by electrons sheared flow parallel to external magnetic field in heavier ion plasmas

Ahmad

Saleem

2012

Physics of Plasmas

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Nonlinear equations for an electrostatic perturbation in hybrid frequency range are derived in a magnetized heavier ion plasma assuming that the electrons are flowing with a sheared velocity along the initial external constant magnetic field B 0zẑ . As a result of this current, the total zero-order magnetic field becomes sheared as B 0 ¼ B 0zẑ þ B 0y ðxÞŷ. Such a system can give rise to unstable electrostatic waves under certain conditions. The solutions of the nonlinear equations are obtained in the form of dipolar vortices, which can play an important role in plasma transport across field lines. This work can be useful for the future experiments on sheared electron flows. V C 2012 American Institute of Physics. [http://dx.

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Streaming instabilities in multicomponent interstellar clouds

Abstract: Articles you may be interested inModulational instability of dust acoustic solitons in multicomponent plasma with kappa-distributed electrons and ions Phys.

Cited by 16 publications

References 23 publications

Kinetic Alfvén wave instability in a Lorentzian dusty magnetoplasma

Kinetic Alfvén wave instability in a Lorentzian dusty magnetoplasma

Investigation of dust ion acoustic shock and solitary waves in a viscous dusty plasma

Short scale electrostatic vortices driven by electrons sheared flow parallel to external magnetic field in heavier ion plasmas

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