Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8177023 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2014 | 4 Pages |
Abstract
Supernova Remnant (SNR) shocks are believed to accelerate charged particles and to generate strong turbulence in the post-shock flow. From high-energy observations in the past decade, a magnetic field at SNR shocks largely exceeding the shock-compressed interstellar field has been inferred. We outline how such a field amplification results from a small-scale dynamo process downstream of the shock, providing an explicit expression for the turbulence back-reaction to the fluid whirling. The spatial scale of the X-ray rims and the short time-variability can be obtained by using reasonable parameters for the interstellar turbulence. We show qualitatively that such a vortical field saturation might be faster than the acceleration time of the synchrotron emitting energetic electrons.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
F. Fraschetti,