Publication Date:
2019-07-19
Description:
Plasma instabilities excited in collisionless shocks are responsible for particle acceleration. We have investigated the particle acceleration and shock structure associated with an unmagnetized relativistic electron-positron jet propagating into an unmagnetized electron-positron plasma. Cold jet electrons are thermalized and slowed while the ambient electrons are swept up to create a partially developed hydrodynamic-like shock structure. In the leading shock, electron density increases by a factor of about 3.5 in the simulation frame. Strong electromagnetic fields are generated in the trailing shock and provide an emission site. These magnetic fields contribute to the electrons transverse deflection behind the shock. We calculate the radiation from deflected electrons in the turbulent magnetic fields. The properties of this radiation may be important for understanding the complex time evolution and/or spectral structure in gamma-ray bursts, relativistic jets in general, and supernova remnants.
Keywords:
Space Radiation
Type:
M10-0176
,
M10-0132
,
M10-0133
,
Dynamical Processes in Space Plasmas; May 11, 2008 - May 19, 2008; Ein-bokek; Israel|High Energy Astrophysics Division (HEAD) 2010; Mar 01, 2010 - Mar 04, 2010; Big Island, HI; United States|Acceleration and Emission Processes at High Energies and their Application to AGN; Jan 25, 2010 - Jan 26, 2010; Paris; France
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