Initial time dependence of abundances in solar energetic particle events

被引：45
作者：
Reames, DV
Ng, CK
Tylka, AJ
机构：
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] USN, Res Lab, EO Hulburt Ctr Space Res, Washington, DC 20375 USA
[3] Univ Maryland, Dept Astron, College Pk, MD 20742 USA
来源：
ASTROPHYSICAL JOURNAL | 2000年 / 531卷 / 01期
关键词：
acceleration of particles; shock waves; Sun : corona; Sun : particle emission;
D O I：
10.1086/312517
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We compare the initial behavior of Fe/O and He/H abundance ratios and their relationship to the evolution of the proton energy spectra in "small" and "large" gradual solar energetic particle (SEP) events. The results are qualitatively consistent with the behavior predicted by the theory of Ng et al. published in 1999. He/H ratios that initially rise with time are a signature of scattering by non-Kolmogorov Alfven wave spectra generated by intense beams of shock-accelerated protons streaming outward in large gradual SEP events.
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页码：L83 / L86
页数：4
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