HIGH CORONAL FLARES AND IMPULSIVE ACCELERATION OF SOLAR ENERGETIC PARTICLES

被引：30

作者：

CLIVER, E ^{[1
]}

KAHLER, S ^{[1
]}

机构：

[1] BOSTON COLL,INST SPACE RES,CHESTNUT HILL,MA 02167

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 366卷 / 02期

关键词：

D O I：

10.1086/185916

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

During high coronal flares (HCFs), electrons are impulsively accelerated to energies < 15 keV at altitudes > 0.5 R. above the photosphere (Potter, Lin & Anderson). The existence of HCFs indicates that the current paradigm for impulsive acceleration of solar energetic particles (SEPs), which focuses on low-lying (less-than-or-similar-to 10(4) km) flares, should be expanded to include high-altitude events. We review evidence suggesting that the source regions of HCFs are hot (10(7) K) and consider an alternative scenario in which the source region of the He-3 enhancement in SEP events from impulsive flares is distinct from the source region of the enhanced abundances of high-Z (Z greater-than-or-equal-to 6) ions. We propose that HCFs occur as a result of reconnection in the neutral current sheets of coronal streamers.

引用

页码：L91 / L94

页数：4

共 53 条

[1] RELATIVE ABUNDANCES AND ENERGY-SPECTRA OF SOLAR-FLARE-ACCELERATED DEUTERIUM, TRITIUM, AND HELIUM-3 [J].