Effect of a Random Magnetic Field on the Onset Times of Solar Particle Events

Details Effect of a Random Magnetic Field on the Onset Times of Solar Particle Events Effect of a Random Magnetic Field on the Onset Times of Solar Particle Events

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...641.1222p&link_type=abstract

The Astrophysical Journal, Volume 641, Issue 2, pp. 1222-1226.

Astronomy and Astrophysics

Astronomy

12

Scattering, Sun: Solar Wind, Sun: Magnetic Fields

Scientific paper

We present the results of numerical simulations of solar energetic particles (SEPs) moving in a model heliospheric 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.

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