Coronal mass ejections associated with impulsive solar energetic particle events
Coronal mass ejections associated with impulsive solar energetic particle events
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DOI：
10.1086/323847
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发表时间：
2001-11-20
影响因子：
4.9
通讯作者：
Sheeley, NR
中科院分区：
文献类型：
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作者：
Kahler, SW;Reames, DV;Sheeley, NR
2000年5月1日在Wind卫星上观测到的一次太阳高能粒子脉冲事件与一次太阳活动区M1 X射线耀斑有关。在SOHO的LASCO日冕仪上观测到的一个快的（上升速度= 960 km s（-1））、窄的CME的时间和位置清楚地表明了CME与耀斑和SEP事件之间的联系。脉冲性SEP事件长期以来一直与脉冲性耀斑有关，但迄今为止只发现渐进的SEP事件与CME有关。脉冲SEP事件与来自Solwind和LASCO日冕仪的CME观测结果的比较显示了与脉冲SEP事件相关的狭窄（10度-40度）CME的进一步良好情况。最近的一个脉冲耀斑模型包括从活动区上方的磁重联点向上喷射的喷流或等离子体团，因此可能会在日冕图中出现微弱而狭窄的日冕物质抛射。我们建议，这个模型使我们能够更好地了解SEP生产和传播的脉冲耀斑。
An impulsive solar energetic particle (SEP) event observed on the Wind spacecraft on 2000 May 1 was associated with an impulsive solar active region M1 X-ray flare. The timing and position of a fast (upsilon = 960 km s(-1)), narrow CME observed in the LASCO coronagraph on SOHO make clear the connection between the CME and the flare and SEP event. Impulsive SEP events have long been associated with impulsive flares, but only gradual SEP events have thus far been found to be associated with CMEs. A comparison of impulsive SEP events with CME observations from the Solwind and LASCO coronagraphs revealed further good cases of narrow (10 degrees -40 degrees) CMEs associated with impulsive SEP events. A recent model of impulsive flares includes jets or plasmoids that are ejected upward from magnetic reconnection sites over active regions and might therefore be expected to appear in exceptional cases as faint and narrow CMEs in coronagraphs. We suggest that this model allows us to understand better SEP production and propagation in impulsive flares.