Weibel instability driven by relativistic pair jets: Particle acceleration, magnetic field generation, and emission
2004
6 pages
Part of Relativistic astrophysics. Proceedings, 22nd Texas Symposium, Stanford, USA, December 13-17, 2004
Published in:
- eConf C041213 (2004) 2211
e-Print:
- astro-ph/0503515 [astro-ph]
Report number:
- TSRA-2004-2211
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Abstract: (arXiv)
Shock acceleration is a ubiquitous phenomenon in astrophysical plasmas. Plasma waves and their associated instabilities (e.g., Buneman, Weibel and other two-stream instabilities) created in collisionless 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 into an ambient plasma. We find that the growth times of the Weibel instability in electron-positron jets are not affected by the (electron-positron or electron-ion) ambient plasmas. However, the amplitudes of generated local magnetic fields in the electron-ion ambient plasma are significantly larger than those in the electron-positron ambient plasma.References(17)
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