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- W3100142317 abstract "Shock acceleration is an ubiquitous phenomenon in astrophysical plasmas. Plasma waves and their associated instabilities (e.g., the Buneman instability, two‐streaming instability, and the Weibel instability) created in the shocks are responsible for particle (electron, positron, and ion) acceleration. Using a 3‐D relativistic electromagnetic particle (REMP) code, we have investigated particle acceleration associated with a relativistic jet front propagating through an ambient plasma with and without initial magnetic fields. We find only small differences in the results between no ambient and weak ambient magnetic fields. Simulations show that the Weibel instability created in the collisionless shock front accelerates particles perpendicular and parallel to the jet propagation direction. The simulation results show that this instability is responsible for generating and amplifying highly nonuniform, small‐scale magnetic fields, which contribute to the electron’s transverse deflection behind the jet head. The “jitter” radiation from deflected electrons has different properties than synchrotron radiation which is calculated in a uniform magnetic field. This jitter radiation may be important to understanding the complex time evolution and/or spectral structure in gamma‐ray bursts, relativistic jets, and supernova remnants." @default.
- W3100142317 created "2020-11-23" @default.
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- W3100142317 date "2004-01-01" @default.
- W3100142317 modified "2023-10-14" @default.
- W3100142317 title "Particle Acceleration and Radiation Associated with Magnetic Field Generation from Relativistic Collisionless Shocks" @default.
- W3100142317 cites W1771424084 @default.
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- W3100142317 doi "https://doi.org/10.1063/1.1810850" @default.
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