Journal article
Kinetic simulations of strongly magnetized parallel shocks: deviations from MHD jump conditions
Monthly notices of the Royal Astronomical Society, Vol.509(2), pp.2084-2090
01/01/2022
DOI: 10.1093/mnras/stab3110
Abstract
Shocks waves are a ubiquitous feature of many astrophysical plasma systems, and an important process for energy dissipation and transfer. The physics of these shock waves are frequently treated/modelled as a collisional, fluid magnetohydrodynamic (MHD) discontinuity, despite the fact that many shocks occur in the collisionless regime. In light of this, using fully kinetic, 3D simulations of non-relativistic, parallel propagating collisionless shocks comprised of electron-positron plasma, we detail the deviation of collisionless shocks form MHD predictions for varying magnetization/Alfvenic Mach numbers, with particular focus on systems with Alfenic Mach numbers much smaller than sonic Mach numbers. We show that the shock compression ratio decreases for sufficiently large upstream magnetic fields, in agreement with theoretical predictions from previous works. Additionally, we examine the role of magnetic field strength on the shock front width. This work reinforces a growing body of work that suggest that modelling many astrophysical systems with only a fluid plasma description omits potentially important physics.
Details
- Title: Subtitle
- Kinetic simulations of strongly magnetized parallel shocks: deviations from MHD jump conditions
- Creators
- Colby C. Haggerty - University of Hawaii SystemAntoine Bret - Instituto de Investigación en Recursos CinegéticosDamiano Caprioli - Fermi National Accelerator Laboratory
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.509(2), pp.2084-2090
- DOI
- 10.1093/mnras/stab3110
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford Univ Press
- Number of pages
- 7
- Grant note
- AGS-1936393 / FDSS NSF SBPLY/17/180501/000264 / Junta de Comunidades de Castilla-La Mancha 80NSSC18K1218 / NASA; National Aeronautics & Space Administration (NASA) TG-AST180008 / XSEDE TACC AST1714658; AST-1909778; PHY-1748958; PHY-2010240 / NSF; National Science Foundation (NSF) ENE2016-75703-R / Spanish Ministerio de Economia y Competitividad; Spanish Government
- Language
- English
- Date published
- 01/01/2022
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9985224415502771
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