Self-similar evolution of cosmic-ray-modified quasi-parallel plane shocks
نویسندگان
چکیده
منابع مشابه
Self-Similar Evolution of Cosmic-Ray-Modified Quasi-Parallel Plane Shocks
Using an improved version of the previously introduced CRASH (Cosmic Ray Acceleration SHock) code, we have calculated the time evolution of cosmic-ray (CR) modified quasi-parallel plane shocks for Bohm-like diffusion, including self-consistent models of Alfvén wave drift and dissipation, along with “thermal leakage injection” of CRs. The new simulations follow evolution of the CR distribution t...
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We have developed a novel computer code designed to follow the evolution of cosmic-ray modified shocks, including the full momentum dependence of the particles for a realistic diffusion coefficient model. In this form the problem is technically very difficult, because one needs to cover a wide range of diffusive scales, beginning with those slightly larger than the physical shock thickness. Wit...
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Strong astrophysical shocks, diffusively accelerating cosmic rays (CR) ought to develop CR precursors. The length of such precursor Lp is believed to be set by the ratio of the CR mean free path λ to the shock speed, i.e., Lp ∼ cλ/Vsh, which is formally independent of the CR pressure Pc. However, the X-ray observations of supernova remnant shocks suggest that the precursor scale may be signific...
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ژورنال
عنوان ژورنال: Astroparticle Physics
سال: 2007
ISSN: 0927-6505
DOI: 10.1016/j.astropartphys.2007.05.007