Spacetime Hall-MHD Turbulence at Sub-ion Scales: Structures or Waves?

  title={Spacetime Hall-MHD Turbulence at Sub-ion Scales: Structures or Waves?},
  author={Emanuele Papini and Antonio Cicone and Luca Franci and Mirko Piersanti and Simone Landi and Petr Hellinger and Andrea Verdini},
  journal={The Astrophysical Journal Letters},
Spatiotemporal properties of two-dimensional (2D) Hall-magnetohydrodynamic (MHD) turbulence at intermediate plasma β = 2 are studied by means of Fast Iterative Filtering (FIF), a new technique for the decomposition of nonstationary nonlinear signals. Results show that the magnetic energy at sub-ion scales is concentrated in perturbations with frequencies smaller than the ion-cyclotron (IC) frequency and with polarization properties that are incompatible with both kinetic Alfvén waves (KAWs) and… 

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