Nonthermal Electron Acceleration at Supernova Shocks: Relativistic Shock Surfing Mechanism

Details Nonthermal Electron Acceleration at Supernova Shocks: Relativistic Shock Surfing Mechanism Nonthermal Electron Acceleration at Supernova Shocks: Relativistic Shock Surfing Mechanism

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.2047h&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

A nonthermal electron acceleration mechanism in high Mach number shocks is studied. We find that the relativistic shock surfing/surfatron acceleration occurs in the shock transition region, where a series of large amplitude electrostatic soliton-like waves (ESWs) are excited by Buneman instability under the interaction between the reflected ions and the incoming electrons. It is shown that the electrons are likely to be trapped by ESWs, and during the trapping phase they can be effectively accelerated by the shock motional/convection electric field. When Alfven Mach number exceeds several tens, the nonthermal electrons are efficiently produced, and their maximum energy reaches up to the shock potential energy determined by the global shock size.

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