Abstract
Linear and nonlinear properties of electrostatic waves on the ion time scale in a collisional rotating magnetoplasma with warm relativistically streaming ions and non-Maxwellian electrons have been investigated here. In the weak nonlinearity limit, we have derived Zakharov-Kuznetsov-Burgers equation to study the shock wave propagation in dissipative magneto-rotating plasmas with non-Maxwellian electrons. It has been found that ion acoustic shock waves with kappa distributed electrons admit only compressive shock structures, however, the ones with Cairns distributed electrons have been shown to allow for the formation of both compressive and rarefactive structures. This change in behavior has been found to be closely linked with the difference in the shapes of both distribution functions. The dependence of the characteristics of ion acoustic shock structures on rotation, obliqueness, relativistic streaming, kinematic viscosity and non-Maxwellian electrons has also been explored in detail. The relevance of the work with regard to planetary magnetospheres and pulsars has also been pointed out.
Highlights
Ion acoustic waves are amongst the fundamental normal modes of plasmas
We study the nonlinear electrostatic ion acoustic shock waves in a dissipative, relativistic rotating magnetoplasma consisting of warm ions and electrons whose distribution in velocity space differs appreciably from Maxwellian distribution either in regions of low phase space density or high phase space density
We have studied the ion acoustic shock waves in a magnetorotating relativistic plasma in the presence of nonMaxwellian electrons
Summary
Ion acoustic waves are amongst the fundamental normal modes of plasmas. The signature of these waves is that they cause density enhancement in the plasma as they propagate through the medium. Relativistic effects were first incorporated to study the nonlinear waves in space plasmas by Arons.. Many problems in plasma physics such as pulsar/Kerr black-hole magnetospheres and tokamaks where plasmas rotating briskly were encountered It was, deemed necessary to investigate these problems in non-inertial frames. Cairns et al. showed that rarefactive ion acoustic solitary structures could form in the presence of a non-Maxwellian distribution of electrons in conformity with the observations by Freja and Viking satellites.. We study the nonlinear electrostatic ion acoustic shock waves in a dissipative, relativistic rotating magnetoplasma consisting of warm ions and electrons whose distribution in velocity space differs appreciably from Maxwellian distribution either in regions of low phase space density or high phase space density.
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