Particle acceleration and magnetic field amplification by relativistic shocks in inhomogeneous media
arXiv:2405.15138 · doi:10.3847/2041-8213/ad50a2
Abstract
Particle acceleration and magnetic field amplification in relativistic shocks propagating in inhomogeneous media are investigated by three-dimensional magnetohydrodynamical (MHD) simulations and test-particle simulations. The MHD simulations show that the interaction between the relativistic shock and dense clumps amplifies the downstream magnetic field to the value expected from observations of the gamma-ray burst. The test-particle simulations in the electromagnetic field given by the MHD simulation show that particles are accelerated by the downstream turbulence and the relativistic shock. We provide the injection energy to the shock acceleration in this system. If the amplitude of upstream density fluctuations is sufficiently large, low-energy particles are initially accelerated to the injection energy by the downstream turbulence and then rapidly accelerated to higher energies by the relativistic shock. Therefore, the density fluctuation significantly affects particle acceleration in the relativistic shock.
arXiv comment8 pages, 5 figures, accepted for publication in ApJL
References in corpus (40)
- Particle acceleration by ultra-relativistic shocks: theory and simulations
- Particle acceleration in relativistic collisionless shocks: Fermi process at last?
- The Maximum Energy of Accelerated Particles in Relativistic Collisionless Shocks
- Gamma-Ray Burst Afterglow: Polarization and Analytic Light Curves
- Equation of State in Relativistic Magnetohydrodynamics: variable versus constant adiabatic index
- Open Questions in Cosmic-Ray Research at Ultrahigh Energies
- Ultra-high-energy cosmic ray acceleration by relativistic blast waves
- The spectrum of particles accelerated in relativistic, collisionless shocks
- High-order conservative finite difference GLM-MHD schemes for cell-centered MHD
- Particle transport in tangled magnetic fields and Fermi acceleration at relativistic shocks
- Three-Dimensional Simulations of MHD Turbulence Behind Relativistic Shock Waves and Their Implications for GRBs
- On the efficiency of Fermi acceleration at relativistic shocks
- Production of magnetic energy by macroscopic turbulence in GRB afterglows
- Magnetic Field Amplification and Saturation in Turbulence Behind a Relativistic Shock
- Cosmic-Ray Acceleration at Ultrarelativistic Shock Waves: Effects of Downstream Short-Wave Turbulence
- First 3D Radiation-Hydrodynamic Simulations of Wolf-Rayet Winds
- Turbulent amplification of magnetic field driven by dynamo effect at rippled shocks
- Relativistic Fermi acceleration with shock compressed turbulence
- Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium
- The Efficiency of Magnetic Field Amplification at Shocks by Turbulence
- Magnetohydrodynamic Simulation Code CANS+: Assessments and Applications
- Turbulent Shear Acceleration
- Turbulent Magnetic Field Amplification by the Interaction of Shock Wave and Inhomogeneous Medium
- Physics and phenomenology of weakly magnetized, relativistic astrophysical shock waves
- Injection to rapid diffusive shock acceleration at perpendicular shocks in partially ionized plasmas
- Magnetic field amplification by collisionless shocks in partially ionized plasmas
- Stochastic Acceleration Model of Gamma-Ray Burst with Decaying Turbulence
- Reacceleration of electrons in supernova remnants
- Ultra-relativistic geometrical shock dynamics and vorticity
- Physics of relativistic collisionless shocks: III The suprathermal particles
- The implications of TeV detected GRB afterglows for acceleration at relativistic shocks
- Weibel-Mediated Shocks Propagating into Inhomogeneous Electron-Positron Plasmas
- Clumping in the Winds of Wolf-Rayet Stars
- Weibel instability driven by spatially anisotropic density structures
- Prospects for ultra-high-energy particle acceleration at relativistic shocks
- Relativistic Collisionless Shocks in Inhomogeneous Magnetized Plasmas
- Particle acceleration at ultrarelativistic, perpendicular shock fronts
- Fast Particle Acceleration at Perpendicular Shocks with Uniform Upstream Magnetic Field and Strong Downstream Turbulence
- Interaction of a Relativistic Magnetized Collisionless Shock with a Dense Clump
- Particle acceleration in a shock wave propagating to an inhomogeneous medium
Cited by in corpus (4)
- Collisionless shock in a relativistically hot unmagnetized electron-positron plasma
- Property of downstream turbulence driven by the special relativistic shock-clump interaction
- Very-high-energy gamma rays from cosmic rays escaping from Galactic black hole binaries
- Collisionless shocks having relativistic velocities in relativistically hot plasmas