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particle acceleration, magnetic field generation and emission from relativistic jets and supernova remnantsWe performed numerical simulations of particle acceleration, magnetic field generation, and emission from shocks in order to understand the observed emission from relativistic jets and supernova remnants. The investigation involves the study of collisionless shocks, where the Weibel instability is responsible for particle acceleration as well as magnetic field generation. A 3-D relativistic particle-in-cell (RPIC) code has been used to investigate the shock processes in electron-positron plasmas. The evolution of theWeibe1 instability and its associated magnetic field generation and particle acceleration are studied with two different jet velocities (0 = 2,5 - slow, fast) corresponding to either outflows in supernova remnants or relativistic jets, such as those found in AGNs and microquasars. Slow jets have intrinsically different structures in both the generated magnetic fields and the accelerated particle spectrum. In particular, the jet head has a very weak magnetic field and the ambient electrons are strongly accelerated and dragged by the jet particles. The simulation results exhibit jitter radiation from inhomogeneous magnetic fields, generated by the Weibel instability, which has different spectral properties than standard synchrotron emission in a homogeneous magnetic field.
Document ID
20070002085
Document Type
Conference Paper
Authors
Nishikawa, K.-I.
(National Space Science and Technology Center Huntsville, AL, United States)
Hartmann, D. H.
(Clemson Univ. SC, United States)
Hardee, P.
(Alabama Univ. Huntsville, AL, United States)
Hededal, C.
(Niels Bohr Inst. Copenhagen, Denmark)
Mizunno, Y.
(National Space Science and Technology Center Huntsville, AL, United States)
Fishman, G. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2006
Subject Category
Astronomy
Meeting Information
6th INTEGRAL Workshop: The Obscured Universe(Moscow)
Distribution Limits
Public
Copyright
Other