Weibel-dominated quasi-perpendicular shock: hybrid simulations and in situ observations

Abstract

We directly compare hybrid kinetic simulations and in situ observations of a high Mach number high-$\beta$ shock in the Solar wind. We launch virtual probes to demonstrate that the model quantitatively reproduces the observations. The observed wave properties are caused by the ion Weibel instability in the shock foot. Parameters of reflected ions in the shock foot are extracted from simulations, and their coordinate dependencies are linearly approximated. These approximations could be used in analytical models. Due to strong magnetic variations at ramp the reflected ions density can be locally very high (nearly that of the incoming flow), which makes favourable conditions for the instability.

11 pages, 10 figures

References in corpus (10)

• Shocks and cold fronts in galaxy clusters
• On the structure of relativistic collisionless shocks in electron-ion plasmas
• Nonrelativistic collisionless shocks in weakly magnetized electron--ion plasmas: two-dimensional particle-in-cell simulation of perpendicular shock
• Tempestuous life beyond R_500: X-ray view on the Coma cluster with SRG/eROSITA. I. X-ray morphology, recent merger, and radio halo connection
• Shocks and non-thermal particles in clusters of galaxies
• Tempestuous life beyond R500: X-ray view on the Coma cluster with SRG/eROSITA. II. Shock & Relic
• MMS direct observations of kinetic-scale shock self-reformation
• Solar wind discontinuity transformation at the bow shock
• Direct Multipoint Observations Capturing the Reformation of a Supercritical Fast Magnetosonic Shock
• Mach Number Dependence of Ion-scale Kinetic Instability at Collisionless Perpendicular Shock: Condition for Weibel-dominated Shock

Cited by in corpus (1)

• Electron Weibel instability and~quasi-magnetostatic structures in~an~expanding collisionless plasma