Effect of a random magnetic field on the onset times of solar particle events

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

We present the results of numerical simulations of solar energetic particles (SEPs) moving in a model helio-spheric magnetic field. We find that the onset time of a given SEP event can be sooner than estimated by assuming that particles move along the usual Parker spiral, which is generally believed to be the earliest time. This is because for a random magnetic field, some magnetic field lines are shorter than the nominal (Parker spiral) length. This is important with regard to the physics of injection and/or acceleration at the origin of the particle event.

Original languageEnglish (US)
Pages (from-to)1222-1226
Number of pages5
JournalAstrophysical Journal
Volume641
Issue number2 I
DOIs
StatePublished - Apr 20 2006

Keywords

  • Scattering
  • Solar wind
  • Sun: magnetic fields

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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