First order Fermi acceleration at multiple oblique shocks

U. D J Gieseler, T. W. Jones

    Research output: Contribution to journalArticlepeer-review

    17 Scopus citations


    Numerical results for particle acceleration at multiple oblique shocks are presented. We calculate the steady state spectral slope of test particles accelerated by the first order Fermi process. The results are compared to analytical treatments for parameters where the diffusion approximation does apply. Effects of injection and finite shock extent are included phenomenologically. We find the spectrum of accelerated particles to harden substantially at multiple oblique shocks and discuss the influence of the number of shocks compared to the obliquity itself.

    Original languageEnglish (US)
    Pages (from-to)1133-1136
    Number of pages4
    JournalAstronomy and Astrophysics
    Issue number3
    StatePublished - Dec 1 2000


    • Acceleration of particles
    • ISM: cosmic rays
    • Methods: numerical
    • Shock waves


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