Electron Heating in High Mach Number Collisionless Shocks

A. Vanthieghem, V. Tsiolis, A. Spitkovsky, Y. Todo, K. Sekiguchi, F. Fiuza

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The energy partition in high Mach number collisionless shock waves is central to a wide range of high-energy astrophysical environments. We present a new theoretical model for electron heating that accounts for the energy exchange between electrons and ions at the shock. The fundamental mechanism relies on the difference in inertia between electrons and ions, resulting in differential scattering of the particles off a decelerating magnetically dominated microturbulence across the shock transition. We show that the self-consistent interplay between the resulting ambipolar-type electric field and diffusive transport of electrons leads to efficient heating in the magnetic field produced by the Weibel instability in the high Mach number regime and is consistent with fully kinetic simulations.

Original languageEnglish (US)
Article number265201
JournalPhysical review letters
Volume132
Issue number26
DOIs
StatePublished - Jun 28 2024

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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