Relativistic particle acceleration in developing Alfvén turbulence

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    Abstract

    A new particle acceleration process in a developing Alfvén turbulence in the course of successive parametric instabilities of a relativistic pair plasma is investigated by utilizing one-dimensional electromagnetic full particle code. Coherent wave-particle interactions result in efficient particle acceleration leading to a power-law-like energy distribution function. In the simulation, high-energy particles having large relativistic masses are preferentially accelerated as the turbulence spectrum evolves in time. The main acceleration mechanism is simultaneous relativistic resonance between a particle and two different waves. An analytical expression of maximum attainable energy in such wave-particle interactions is derived.

    Original languageEnglish
    Pages (from-to)1004-1012
    Number of pages9
    JournalAstrophysical Journal
    Volume692
    Issue number2
    DOIs
    Publication statusPublished - Feb 20 2009

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Space and Planetary Science

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