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Alfvénic fluctuations in the expanding solar wind: Formation and radial evolution of spherical polarization

Hellinger, P.; Matteini, L.; Horbury, T. S. +7 more

We investigate properties of large-scale solar wind Alfvénic fluctuations and their evolution during radial expansion. We assume a strictly radial background magnetic field B ∥ R, and we use two-dimensional hybrid (fluid electrons, kinetic ions) simulations of balanced Alfvénic turbulence in the plane orthogonal to B; the simulated plasma evolves …

Kinetic numerical scaling of Alfven cyclotron instability in non-thermal solar wind plasmas

Shahzad, Muhammad Ahsan; Aman-ur-Rehman; Bilal, Muhammad +3 more

Linear plasma kinetic theory for a non-thermal, magnetized, homogeneous, and collisionless plasma is incorporated to study Alfvén cyclotron instability (ACI) driven by the ion/proton perpendicular temperature anisotropy (T⊥p/T∥p>1) ( ⊥, ∥ symbols designate directions perpendicular and parallel to ambient magnetic field, respectively), and the w…