To refer to this page use:
|Abstract:||We study diffusive shock acceleration (DSA) of electrons in nonrelativistic quasi-perpendicular shocks using self-consistent one-dimensional particle-in-cell simulations. By exploring the parameter space of sonic and Alfvenic Mach numbers we find that high Mach number quasi-perpendicular shocks can efficiently accelerate electrons to power-law downstream spectra with slopes consistent with DSA prediction. Electrons are reflected by magnetic mirroring at the shock and drive nonresonant waves in the upstream. Reflected electrons are trapped between the shock front and upstream waves, and undergo multiple cycles of shock-drift acceleration before the injection into DSA. Strong current-driven waves also temporarily change the shock obliquity and cause mild proton pre-acceleration even in quasi-perpendicular shocks, which otherwise do not accelerate protons. These results can be used to understand nonthermal emission in supernova remnants and intracluster medium in galaxy clusters.|
|Electronic Publication Date:||10-Jul-2020|
|Citation:||Xu, R, Spitkovsky, A, Caprioli, D. (2020). Electron Acceleration in One-dimensional Nonrelativistic Quasi-perpendicular Collisionless Shocks. ASTROPHYSICAL JOURNAL LETTERS, 897 (2), 10.3847/2041-8213/aba11e|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||ASTROPHYSICAL JOURNAL LETTERS|
|Version:||Final published version. This is an open access article.|
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.