Two-dimensional Hybrid model of Collisionless Relaxation of Ion Distributions downstream of Quasi-perpendicular Shocks

L. Ofman, M. Gedalin

Research output: Contribution to journalArticle

Abstract

Recent STEREO observations reveal that large scale downstream magnetic oscillations are quite typical for quasi-perpendicular low-Mach number shock. It has been shown recently, both in theory and 1D hybrid simulations, that these oscillations are, most plausibly, related to the collisionless relaxation of the downstream gyrating ion distributions. A number of observed shocks exhibit clear deviations from one-dimensionality. We extend our previous analysis to two-spatial dimensions by using 2D hybrid code, which allows studying the inhomogeneity along the shock front. We investigate in detail the formation of gyrating distributions in this 2D geometry and further relaxation of these distributions accompanying with generation of magnetic oscillations.
Original languageEnglish GB
JournalAmerican Geophysical Union, Fall Meeting 2009
Volume42
StatePublished - 1 Dec 2009
Externally publishedYes

Keywords

  • 7811 SPACE PLASMA PHYSICS / Discontinuities
  • 7833 SPACE PLASMA PHYSICS / Mathematical and numerical techniques
  • 7845 SPACE PLASMA PHYSICS / Particle acceleration
  • 7851 SPACE PLASMA PHYSICS / Shock waves

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