TY  - JOUR
AU  - van Marle, Allard Jan
AU  - Bohdan, Artem
AU  - Morris, Paul
AU  - Pohl, Martin
AU  - Marcowith, Alexandre
TI  - Diffusive Shock Acceleration at Oblique High Mach Number Shocks
JO  - The astrophysical journal / 2
VL  - 929
IS  - 1
SN  - 0004-637X
CY  - Chicago, Ill. [u.a.]
PB  - Univ.
M1  - PUBDB-2022-01938
M1  - arXiv:2203.00353
M1  - DESY-21-171
SP  - 7
PY  - 2022
N1  - ISSN 1538-4357 not unique: **2 hits**.Accepted for publication in ApJ
AB  - The current paradigm of cosmic-ray (CR) origin states that the greater part of galactic CRs is produced by supernova remnants. The interaction of supernova ejecta with the interstellar medium after a supernova's explosions results in shocks responsible for CR acceleration via diffusive shock acceleration (DSA). We use particle-in-cell (PIC) simulations and a combined PIC-magnetohydrodynamic (PIC-MHD) technique to investigate whether DSA can occur in oblique high Mach number shocks. Using the PIC method, we follow the formation of the shock and determine the fraction of the particles that gets involved in DSA. With this result, we use PIC-MHD simulations to model the large-scale structure of the plasma and the magnetic field surrounding the shock and find out whether or not the reflected particles can generate upstream turbulence and trigger DSA. We find that the feasibility of this process in oblique shocks depends strongly on the Alfvénic Mach number, and the DSA process is more likely to be triggered at high Mach number shocks.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000780042800001
DO  - DOI:10.3847/1538-4357/ac5962
UR  - https://bib-pubdb1.desy.de/record/477572
ER  -