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arXiv 2103.13621astro-ph.SR
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11944超活动区主要太阳高能粒子事件的来源

The source of the major solar energetic particle events from super active region 11944

David H. Brooks, Stephanie L. Yardley

摘要:

与快速日冕物质抛射(CME)相关的冲击波在长时间内加速太阳高能粒子(SEP),对载人航天和近地技术资产构成危害,但CME冲击加速等离子体的来源仍有争议。在这里,我们使用太阳物理系统天文台的多信使观测,以确定等离子体局限在热的足点,核心循环的活动区11944的主要逐渐SEP事件在2014年1月的来源。我们表明,在足迹光谱检测到的元素组成签名解释了地球附近的粒子计数技术的测量。我们的结果本地化的元素分馏过程的色球层的顶部。最靠近日冕磁场强度高(几百高斯)的区域的等离子体形成了SEP成分特征。这种源物质不断地从磁约束中释放出来,并在M级、C级和X级耀斑之后作为SEP被加速。

英文摘要:

Shock waves associated with fast coronal mass ejections (CMEs) accelerate solar energetic particles (SEPs) in the long duration, gradual events that pose hazards to crewed spaceflight and near-Earth technological assets, but the source of the CME shock-accelerated plasma is still debated. Here, we use multi-messenger observations from the Heliophysics System Observatory to identify plasma confined at the footpoints of the hot, core loops of active region 11944 as the source of major gradual SEP events in January 2014. We show that the elemental composition signature detected spectroscopically at the footpoints explains the measurements made by particle counting techniques near Earth. Our results localize the elemental fractionation process to the top of the chromosphere. The plasma confined closest to that region, where the coronal magnetic field strength is high (a few hundred Gauss), develops the SEP composition signature. This source material is continually released from magnetic confinement and accelerated as SEPs following M-, C-, and X-class flares.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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