CME磁结构和IMF预处理对SEP输运的影响
CME Magnetic Structure and IMF Preconditioning Affecting SEP Transport
摘要：
日冕物质抛射（CME）和太阳高能粒子（SEP）是两种能在日光层造成严重空间天气影响的现象。日冕物质抛射的演化，特别是它们的磁结构，以及行星际磁场（IMF）的配置，影响SEPs的传输是目前活跃的研究领域。这两个方面不一定是相互独立的，特别是在太阳活动极大期，多个爆发事件可能在时间上接近发生。因此，我们对2012年5月11日爆发的CME（SOL 2012 -05-11）和2012年5月17日爆发后的SEP事件（SOL 2012 -05-17）进行了分析。在使用遥感数据从三个角度观察了5月11日CME之后，我们使用几种模型评估了它通过行星际空间的传播。然后，我们分析了现场测量从五个预测的影响位置（金星，地球，斯皮策太空望远镜，火星科学实验室在前往火星，火星），以寻找日冕物质抛射的签名。我们发现，所有的原位位置检测到SEP事件的签名，我们追溯到5月17日的喷发。这些发现表明，5月11日的CME为SEP的有效传输提供了直接的磁连接。我们讨论了空间天气的影响，日冕物质抛射的演变，特别是它的磁结构，和日冕物质抛射驱动的国际货币基金组织的预处理，促进SEP运输。最后，这项工作说明了使用来自多个航天器的数据的重要性，即使是那些不将空间天气研究作为其主要目标的航天器。
英文摘要：
Coronal mass ejections (CMEs) and solar energetic particles (SEPs) are two phenomena that can cause severe space weather effects throughout the heliosphere. The evolution of CMEs, especially in terms of their magnetic structure, and the configuration of the interplanetary magnetic field (IMF) that influences the transport of SEPs are currently areas of active research. These two aspects are not necessarily independent of each other, especially during solar maximum when multiple eruptive events can occur close in time. Accordingly, we present the analysis of a CME that erupted on 2012 May 11 (SOL2012-05-11) and an SEP event following an eruption that took place on 2012 May 17 (SOL2012-05-17). After observing the May 11 CME using remote-sensing data from three viewpoints, we evaluate its propagation through interplanetary space using several models. Then, we analyse in-situ measurements from five predicted impact locations (Venus, Earth, the Spitzer Space Telescope, the Mars Science Laboratory en route to Mars, and Mars) in order to search for CME signatures. We find that all in-situ locations detect signatures of an SEP event, which we trace back to the May 17 eruption. These findings suggest that the May 11 CME provided a direct magnetic connectivity for the efficient transport of SEPs. We discuss the space weather implications of CME evolution, regarding in particular its magnetic structure, and CME-driven IMF preconditioning that facilitates SEP transport. Finally, this work remarks the importance of using data from multiple spacecraft, even those that do not include space weather research as their primary objective.
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