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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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