Collisional magnetized shock waves: One-dimensional full particle-in-cell simulations.

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.