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Record Details

Record 33 of 152
Particle acceleration magnetic field generation, and emission in Relativistic pair jets
Author and Affiliation:
Nishikawa, K.-I.(National Space Science and Technology Center, Huntsville, AL, United States)
Ramirez-Ruiz, E.(Institute of the Aerospace Sciences, New York, NY, United States)
Hardee, P.(Alabama Univ., Tuscaloosa, AL, United States)
Hededal, C.(Niels Bohr Inst., Dept. of Astrophysics, Copenhagen, Denmark)
Kouveliotou, C.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Fishman, G. J.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: Plasma waves and their associated instabilities (e.g., the Buneman instability, two-streaming instability, and the Weibel instability) are responsible for particle acceleration in relativistic pair jets. Using a 3-D relativistic electromagnetic particle (REMP) code, we have investigated particle acceleration associated with a relativistic pair jet propagating through a pair plasma. Simulations show that the Weibel instability created in the collisionless shock accelerates particles perpendicular and parallel to the jet propagation direction. Simulation results show that this instability generates and amplifies highly nonuniform, small-scale magnetic fields, which contribute to the electron's transverse deflection behind the jet head. The "jitter' I radiation from deflected electrons can have 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. The growth rate of the Weibel instability and the resulting particle acceleration depend on the magnetic field strength and orientation, and on the initial particle distribution function. In this presentation we explore some of the dependencies of the Weibel instability and resulting particle acceleration on the magnetic field strength and orientation, and the particle distribution function.
Publication Date: Jan 01, 2005
Document ID:
20050207582
(Acquired Sep 06, 2005)
Subject Category: NUCLEAR PHYSICS
Document Type: Preprint
Meeting Information: Astrophysical Sources of High Energy Particles and Radiation; 20-24 Jun. 2005; Torun; Poland
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: PARTICLE ACCELERATION; GENERATION; FIELD EMISSION; NONUNIFORM MAGNETIC FIELDS; RELATIVISTIC PLASMAS; RELATIVISTIC PARTICLES; DEFLECTION; DISTRIBUTION FUNCTIONS; GAMMA RAY BURSTS; MAGNETIC FLUX; PLASMA WAVES; SYNCHROTRON RADIATION
Availability Source: Other Sources
Availability Notes: Abstract Only
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