Diffusive shock acceleration in the presence of current sheets

J. Kóta, J. R. Jokipii

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We study the nature of diffusive shock acceleration in the presence of current sheets which are oriented normal to the shock, so that the drift along the sheets carries particles either away from or toward the shock plane. We consider a system with periodic regions of alternating magnetic field direction. This can be taken to be a very crude repesentation of the termination of the solar wind, with the equator being one sheet and the pole, with its rapid opposite drift, being another. We find very important effects of the current sheets. For example, particle intensities at the shock will be enhanced near one sheet and depressed at the other. Furthermore, the intensity at high energies (averaged over the shock plane) may in fact be considerably larger than in the standard one-dimensional infinite shock case. Implications of these results for the possible acceleration of cosmic electrons up to high energies at the solar-wind termination shock will briefly be discussed.

Original languageEnglish (US)
Pages (from-to)385-390
Number of pages6
JournalAstrophysical Journal
Volume429
Issue number1
DOIs
StatePublished - Jul 1 1994

Keywords

  • Acceleration of particles
  • Cosmic rays
  • Shock waves
  • Solar wind

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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