摘要
本文基于观测日珥上升运动与日冕物质抛射（CME）之间的紧密联系和我们对日珥动力学特征的理解，探讨了在背景场作用下，日珥上升时其上方盔状冕流的动力学演化规律；分析了1980年8月18日爆发日珥与对应的CME事件之间的内在关系．结果表明：（1）缓慢上升的日珥只引起盔状冕流缓慢演化；（2）加速上升日珥的加速度和末速度的大小决定形成CME事件的激烈程度；（3）CME事件的能量可能来源于爆发日环释放的磁能．理论分析与观测结果基本一致．
On the basis of the close relation between ascending prominences and coronal mass ejections (CMEs) as well as our understanding of the properties of the prominence dynamics, we study the dynamic evolutionary properties of the helmet coronal loop above an ascending prondnenee under the interaction of the background magnetic field, analyze the intrinsic relation between the eruptive prominence and the CME on Aug. 18, 1980. We have found the following: (1) The slowly ascending prominence leads to the gradual change of the helmet coronal streamer; (2) The acceleration and ultimate velocity of the ascending prominence determine the degree of violence of the CME event; (3)The energy of the CME may come from the released magnetic energy of the eruptive prominence. Our theoretical analysis is basically consistent with observational data.
出处
《天文学报》
CSCD
北大核心
1997年第2期160-166,共7页
Acta Astronomica Sinica
基金
国家自然科学基金
江苏省自然科学基金
关键词
日珥
上升运动
日冕
物质抛射
ascending prominence, helmet coronal streamer, coronal mass ejection
