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Paper: Simulation of Relativistic Shocks and Associated Radiation
Volume: 429, Numerical Modeling of Space Plasma Flows, Astronum-2009
Page: 127
Authors: Nishikawa, K.; Niemiec, J.; Medvedev, M.; Zhang, B.; Hardee, P.; Mizuno, Y.; Nordlund, A.; Frederiksen, J.; Sol, H.; Pohl, M.; Hartmann, D. H.; Oka, M.; Fishman, J. F.
Abstract: We investigated long-term particle acceleration associated with a relativistic electron-positron (ion) jet propagating in an unmagnetized ambient electron-positron (ion) plasma using our 3-D relativistic particle-in-cell (PIC) code parallelized with MPI. Cold jet electrons are thermalized and ambient electrons are accelerated in the resulting shocks for both cases. Acceleration of ambient electrons leads to a maximum ambient electron density three times larger than the original value for pair plasmas. We calculated radiation from electrons propagating in a uniform parallel magnetic field to verify the technique. We also used the new technique to calculate emission from electrons based on simulations with a small system with two different case for Lorentz factors. We obtained spectra which are consistent with those generated from electrons propagating in turbulent magnetic fields, which are generated at an early nonlinear stage of the Weibel instability.
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