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

被引：33

作者：

Pei, C ^{[1
]}

Jokipii, JR ^{[1
]}

Giacalone, J ^{[1
]}

机构：

[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 641卷 / 02期

关键词：

scattering; solar wind; Sun : magnetic fields;

D O I：

10.1086/427161

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：1222 / 1226

页数：5

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