Kinetic Simulation on Electron, Proton and Helium Acceleration in a Nonrelativistic Quasiparallel shock

Abstract

In addition to electrons and protons, nonrelativistic quasiparallel shocks are expected to possess the ability to accelerate heavy ions. The shocks in supernova remnants are generally supposed to be accelerators of the Galactic cosmic rays, which consist of many species of particles. We investigate diffusive shock acceleration (DSA) of electrons, protons and helium ions in a nonrelativistic quasiparallel shock through 1D particle-in-cell (PIC) simulation with a helium-to-proton number density ratio of $0.1$, which is relevant for the Galactic cosmic rays. The simulation indicates that waves can be excited by the flow of the energetic protons and helium ions upstream of the nonrelativistic quasiparallel shock with a sonic Mach number of 14 and an alfvén Mach number of 19.5 in the shock rest frame, and the charged particles are scattered by the self-generated waves and accelerated gradually. Moreover, the spectra of the charged particles downstream of the shock are thermal plus a nonthermal tail, and the acceleration is efficient with about $7\%$ and $5.4\%$ of the bulk kinetic energy transferred into the nonthermal protons and helium ions in the near downstream region at the end of the simulation, respectively.

arXiv comment6 pages, 5 figures. Accepted for publication in MNRAS

References in corpus (14)

• SMILEI: a collaborative, open-source, multi-purpose particle-in-cell code for plasma simulation
• Simulations of Ion Acceleration at Non-relativistic Shocks. I. Acceleration Efficiency
• Supernova remnants: the X-ray perspective
• Fine Structures of Shock of SN 1006 with the Chandra Observation
• Simultaneous Acceleration of Protons and Electrons at Nonrelativistic Quasiparallel Collisionless Shocks
• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• Non-Thermal Electron Acceleration in Low Mach Number Collisionless Shocks. I. Particle Energy Spectra and Acceleration Mechanism
• On the Radio Polarization Signature of Efficient and Inefficient Particle Acceleration in Supernova Remnant SN 1006
• Electron acceleration in non-relativistic quasi-perpendicular collisionless shocks
• Chemical Enhancements in Shock-accelerated Particles: Ab-initio Simulations
• Non-linear diffusive acceleration of heavy nuclei in supernova remnant shocks
• Proton Acceleration in Weak Quasi-parallel Intracluster Shocks: Injection and Early Acceleration
• Particle-in-cell simulations of particle energization via shock drift acceleration from low Mach number quasi-perpendicular shocks in solar flares
• Non-thermal particle acceleration at highly oblique non-relativistic shocks

Cited by in corpus (1)

• Acceleration of Heavy Ions at Non-Relativistic Collisionless Shocks