TY  - GEN
A1  - Nishikawa, K.-I.
A1  - Zhang, B.
A1  - Choi, E. J.
A1  - Min, K. W.
A1  - Niemiec, J.
A1  - Medvedev, M.
A1  - Hardee, P.
A1  - Mizuno, Y.
A1  - Nordlund, A.
A1  - Frederiksen, J.
A1  - Sol, H.
A1  - Pohl, Martin
A1  - Hartmann, D. H.
A1  - Fishman, G.J.
T1  - Radiation from accelerated particles in shocks
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - Recent PIC simulations of relativistic electron-positron (electron-ion) jets injected into a stationary medium show that particle acceleration occurs in the shocked regions. Simulations show that the Weibel instability is responsible for generating and amplifying highly nonuniform, small-scale magnetic fields and for particle acceleration. These magnetic fields contribute to the electron’s transverse eflection behind the shock. The “jitter” radiation from deflected electrons in turbulent magnetic fields has properties different from synchrotron radiation calculated in a uniform magnetic field. This jitter radiation may be important for understanding the complex time evolution and/or spectral structure of gamma-ray bursts, relativistic jets in general, and supernova remnants. In order to calculate radiation from first principles and go beyond the standard synchrotron model, we have used PIC simulations. We present synthetic spectra to compare with the spectra obtained from Fermi observations.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 600 
KW  - relativistic jets
KW  - Weibel instability
KW  - magnetic field generation
KW  - particle acceleration
KW  - radiation
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-413128
SN  - 1866-8372
IS  - 600
SP  - 371
EP  - 372
ER  -