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  On the role of injection in kinetic approaches to non-linear particle acceleration at non-relativistic shock waves

Blasi, P., Gabici, S., & Vannoni, G. (2005). On the role of injection in kinetic approaches to non-linear particle acceleration at non-relativistic shock waves. Monthly Notices of the Royal Astronomical Society, 361(3), 907-918. doi:10.1111/j.1365-2966.2005.09227.x.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-886C-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0011-886D-8
Genre: Journal Article

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 Creators:
Blasi, P.1, Author
Gabici, Stefano2, Author              
Vannoni, Giulia2, Author              
Affiliations:
1INAF/Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 5 I-50125 Firenze, Italy, ou_persistent22              
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              

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Free keywords: acceleration of particles cosmic rays
 Abstract: The dynamical reaction of the particles accelerated at a shock front by the first-order Fermi process can be determined within kinetic models that account for both the hydrodynamics of the shocked fluid and the transport of the accelerated particles. These models predict the appearance of multiple solutions, all physically allowed. We discuss here the role of injection in selecting the real solution, in the framework of a simple phenomenological recipe, which is a variation of what is sometimes referred to as thermal leakage. In this context we show that multiple solutions basically disappear and when they are present they are limited to rather peculiar values of the parameters. We also provide a quantitative calculation of the efficiency of particle acceleration at cosmic ray modified shocks and we identify the fraction of energy which is advected downstream and that of particles escaping the system from upstream infinity at the maximum momentum. The consequences of efficient particle acceleration for shock heating are also discussed.

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Language(s): eng - English
 Dates: 2005-08
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 276595
DOI: 10.1111/j.1365-2966.2005.09227.x
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Alternative Title : MNRAS
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 361 (3) Sequence Number: - Start / End Page: 907 - 918 Identifier: -