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arXiv 1507.02840astro-ph.SR
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太阳上的长寿命高能粒子源区

Long-lived energetic particle source regions on the Sun

R. Bucik, D. E. Innes, N. -H. Chen, G. M. Mason, R. Gomez-Herrero, M. E. Wiedenbeck

摘要:

脉冲太阳高能粒子(SEP)事件发现于40多年前,至今人们对SEP事件的认识还很少。稀有的3He同位素丰度的巨大增强是这些事件最显著的特征,尽管也观察到重核和超重核的大量增强。脉冲事件中经常性的富3He SEP只在有限的时间内被观察到,最多几天,这通常是单个静止航天器与太阳上的源活动区磁连接的时间。随着两个STEREO航天器的发射,我们现在有可能延长与太阳活动区的连接时间。我们研究了源区的演变,显示重复的3He丰富的SEP排放相对较长的时间。我们发现,经常性的3He丰富的SEP在这些长寿命的源出现后,出现的磁通量。

英文摘要:

Discovered more than 40 years ago, impulsive solar energetic particle (SEP) events are still poorly understood. The enormous abundance enhancement of the rare 3He isotope is the most striking feature of these events, though large enhancements in heavy and ultra-heavy nuclei are also observed. Recurrent 3He-rich SEPs in impulsive events have only been observed for limited time periods, up to a few days which is typically the time that a single stationary spacecraft is magnetically connected to the source active regions on the Sun. With the launch of the two STEREO spacecraft we now have the possibility of longer connection time to solar active regions. We examined the evolution of source regions showing repeated 3He-rich SEP emissions for relatively long time periods. We found that recurrent 3He-rich SEPs in these long-lived sources occur after the emergence of magnetic flux.

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