2D particle-in-cell simulations reveal that weakly magnetized quasi-parallel shocks transition from Bell-dominated (inefficient electron acceleration) to Weibel-dominated (efficient electron acceleration) regimes at an Alfvénic Mach number of ~100.
Caprioli \ and\ author A
5 Pith papers cite this work, alongside 196 external citations. Polarity classification is still indexing.
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For hybrid simulations of the ion Weibel instability, reliable results require about 9(M_A/30)^0.51 to 30 cells per ion skin depth, with finer grids producing unphysical whistler modes.
Derives and validates via PIC simulations a scaling law for nonthermal spectral tails in mildly to strongly magnetized turbulent plasmas, with application to black-hole coronae.
A one-zone model fitted to radio observations of WR 102's bubble predicts that protons accelerated at the wind shock dominate high-energy emission but produce an undetectable gamma-ray flux.
This review summarizes the basic principles of electron transport in inhomogeneous and tangled magnetic fields through gyro-centre trajectories, kinetic instabilities, trapping, and diffusion processes.
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Dependence of Particle Acceleration Efficiency on Shock Velocity in Weakly Magnetized Electron-Ion Shocks
2D particle-in-cell simulations reveal that weakly magnetized quasi-parallel shocks transition from Bell-dominated (inefficient electron acceleration) to Weibel-dominated (efficient electron acceleration) regimes at an Alfvénic Mach number of ~100.
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Ion Weibel Instability in the hybrid framework: the optimal resolution
For hybrid simulations of the ion Weibel instability, reliable results require about 9(M_A/30)^0.51 to 30 cells per ion skin depth, with finer grids producing unphysical whistler modes.
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On The Nonthermal Power Laws In Magnetized Turbulent Plasmas
Derives and validates via PIC simulations a scaling law for nonthermal spectral tails in mildly to strongly magnetized turbulent plasmas, with application to black-hole coronae.
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High-energy Processes in the Bubbles of Wolf-Rayet Stars: The case of WR 102
A one-zone model fitted to radio observations of WR 102's bubble predicts that protons accelerated at the wind shock dominate high-energy emission but produce an undetectable gamma-ray flux.
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Transport of electrons in tangled magnetic fields
This review summarizes the basic principles of electron transport in inhomogeneous and tangled magnetic fields through gyro-centre trajectories, kinetic instabilities, trapping, and diffusion processes.