Electron acceleration at supernova remnants
arXiv:2211.13992 · doi:10.1088/1361-6587/aca5b2
Abstract
Supernova remnants (SNRs) are believed to produce the majority of galactic cosmic rays (CRs). SNRs harbor non-relativistic collisionless shocks responsible for acceleration of CRs via diffusive shock acceleration (DSA), in which particles gain their energies via repeated interactions with the shock front. As the DSA theory involves pre-existing mildly energetic particles, a means of pre-acceleration is required, especially for electrons. Electron injection remains one of the most troublesome and still unresolved issues and our physical understanding of it is essential to fully comprehend the physics of SNRs. To study any electron-scale phenomena responsible for pre-acceleration, we require a method capable of resolving these small kinetic scales and Particle-in-cell (PIC) simulations fulfill this criterion. Here I report on the latest achievements made by utilising kinetic simulations of non-relativistic high Mach number shocks. I discuss how the physics of SNR shocks depend on the shock parameters (e.g., the shock obliquity, Mach numbers, the ion-to-electron mass ratio) as well as processes responsible for the electron heating and acceleration.
Accepted for publication in Plasma Physics and Controlled Fusion. 10 pages, 8 figures
References in corpus (26)
- Primary particle acceleration above 100 TeV in the shell-type Supernova Remnant RX J1713.7-3946 with deep H.E.S.S. observations
- Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
- Simultaneous Acceleration of Protons and Electrons at Nonrelativistic Quasiparallel Collisionless Shocks
- A kinetic approach to cosmic ray induced streaming instability at supernova shocks
- Simulations and Theory of Ion Injection at Non-relativistic Collisionless Shocks
- Simulations of Ion Acceleration at Non-relativistic Shocks. III. Particle Diffusion
- Spatial Structure and Collisionless Electron Heating in Balmer-dominated Shocks
- Electron Shock Surfing Acceleration in Multidimensions: Two-dimensional Particle-In-Cell Simulation of Collisionless Perpendicular Shock
- Electron Surfing and Drift Accelerations in a Weibel-dominated High-Mach-number Shock
- Nonrelativistic collisionless shocks in weakly magnetized electron--ion plasmas: two-dimensional particle-in-cell simulation of perpendicular shock
- Observational Evidence for Stochastic Shock Drift Acceleration of Electrons at the Earth's Bow Shock
- Theory of Stochastic Shock Drift Acceleration for Electrons in the Shock Transition Region
- Magnetic field amplification by the Weibel instability at planetary and astrophysical high-Mach-number shocks
- Electron Pre-Acceleration at Nonrelativistic High-Mach-Number Perpendicular Shocks
- A new cosmic ray-driven instability
- Kinetic simulations of nonrelativistic perpendicular shocks of young supernova remnants. I. Electron shock-surfing acceleration
- Particle acceleration and wave excitation in quasi-parallel high-Mach-number collisionless shocks: Particle-in-cell simulation
- Theory of Electron Injection at Oblique Shock of Finite Thickness
- Non-thermal particle acceleration at highly oblique non-relativistic shocks
- Kinetic simulation of nonrelativistic perpendicular shocks of young supernova remnants. IV. Electron heating
- Non-linear diffusive shock acceleration: A recipe for injection of electrons
- Pre-acceleration in the Electron Foreshock I: Electron Acoustic Waves
- High-power laser experiment on developing supercritical shock propagating in homogeneously magnetized plasma of ambient gas origin
- Resonant micro-instabilities at quasi-parallel collisionless shocks: cause or consequence of shock (re)formation
- On the distribution function of suprathermal particles at collisionless shocks
- The electron foreshock at high-Mach-number nonrelativistic oblique shocks