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Record 21 of 272
Relativistic Particle-In-Cell Simulations of Particle Accleration in Relativistic Jets
Author and Affiliation:
Nishikawa, K.-I.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Hardee, P.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Mizuno, Y.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Medvedev, M.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Hartmann, D. H.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Fishman, J. F.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: Highly accelerated particles are observed in astrophysical systems containing relativistic jets and shocks, e.g., active galactic nuclei (AGNs), microquasars, and Gamma-Ray Bursts (GRBs). Particle-In-Cell (PIC) simulations of relativistic electron-ion and electron-positron jets injected into a stationary medium show that efficient acceleration occurs downstream in the jet. In collisionless relativistic shocks particle acceleration is due to plasma waves and their associated instabilities, e.g., the Buneman instability, other two-stream instabilities, and the Weibel (filamentation) instability. Simulations show that the Weibel instability is responsible for generating and amplifying highly non-uniform, small-scale magnetic fields. The instability depends on strength and direction of the magnetic field. Particles in relativistic jets may be accelerated in a complicated dynamics of relativistic jets with magnetic field. We present results of our recent PIC simulations.
Publication Date: Jul 13, 2008
Document ID:
20080036822
(Acquired Sep 19, 2008)
Subject Category: ASTROPHYSICS
Document Type: Conference Paper
Meeting Information: 37th COSPAR Scientific Assembly; 13-20 Jul. 2008; Montreal; Canada
Meeting Sponsor: Committee on Space Research; Paris, France
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: COMPUTERIZED SIMULATION; PARTICLE ACCELERATION; RELATIVISTIC PLASMAS; PLASMA JETS; PLASMA PHYSICS; ASTROPHYSICS; ACTIVE GALACTIC NUCLEI; ELECTRON-POSITRON PLASMAS; MAGNETOHYDRODYNAMIC STABILITY; WEIBEL INSTABILITY
Availability Source: Other Sources
Availability Notes: Abstract Only
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