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 language | English (US) |
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Pages (from-to) | 1222-1226 |
Number of pages | 5 |
Journal | Astrophysical Journal |
Volume | 641 |
Issue number | 2 I |
DOIs | |
State | Published - Apr 20 2006 |
Keywords
- Scattering
- Solar wind
- Sun: magnetic fields
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science