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Masaru Nakanotani1, Renato P Camata2, Robert R Arslanbekov3

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Collisional magnetized shock waves become more laminar due to Coulomb collisions. Electron-electron collisions reduce magnetic overshoot in perpendicular shocks, while ion-electron collisions suppress whistler waves in quasiparallel shocks.

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Area of Science:

  • Plasma physics
  • Astrophysics
  • Space physics

Background:

  • Collisional electrostatic shock waves are well-studied.
  • Collisional magnetized shock waves are less understood.
  • Previous research has primarily focused on collisionless scenarios.

Purpose of the Study:

  • Investigate the effects of Coulomb collisions on magnetized shock waves.
  • Analyze both perpendicular and quasiparallel shock wave configurations.
  • Understand the role of different collision types (ion-ion, electron-electron, ion-electron).

Main Methods:

  • One-dimensional full particle-in-cell simulations.
  • Incorporation of Coulomb collisions between charged particles.
  • Analysis of shock wave dynamics under varying collision parameters.

Main Results:

  • Coulomb collisions drive magnetized shock waves towards a more laminar state.
  • Electron-electron collisions isotropize electron pressure, reducing magnetic overshoot in perpendicular shocks.
  • Ion-electron collisions significantly suppress the standing whistler wave in quasiparallel shocks.

Conclusions:

  • Collisional effects play a crucial role in shaping magnetized shock wave behavior.
  • Understanding these collisional effects is essential for accurate modeling of astrophysical phenomena.
  • The study provides new insights into the transition from collisionless to collisional shock regimes.