Systematic Variation of Cosmic Ray Injection Across Supernova Shocks

Details Systematic Variation of Cosmic Ray Injection Across Supernova Shocks Systematic Variation of Cosmic Ray Injection Across Supernova Shocks

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.2429v&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

1

Scientific paper

The variation of the injection of suprathermal protons into the diffusive shock acceleration process at supernova remnant (SNR) shocks is considered. In the simplest case the shock can be approximated as being spherical in a uniform large-scale magnetic field. The injection rate depends strongly on the obliquity and diminishes as the angle between the ambient field and the shock normal increases. Therefore efficient particle injection takes place only in relatively small regions near the "p oles," reducing the overall CR production. The sizes of these regions depend strongly on the random background field and the Alfv´n wave e turbulence generated due to the CR streaming instability. For the case of SN 1006 they corresp ond to about 20% of the entire shock surface. The results also explain the reduction of the effective injection rate by about two orders of magnitude relative to the value for a purely parallel shock.

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