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两冕流间的对称径向膨胀日冕物质抛射事件
Alternative TitleRADIAL EXPANSION OF A SYMMETRICAL CME BETWEEN TWO CORONAL STREAMERS
章公亮; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
1995
Volume15Issue:4Pages:253-262
ISSN0254-6124
Language中文
Keyword日冕物质抛射 爆发日珥 冕流
Abstract本文讨论了发生在冕流对之间的1980年5月6日日冕物质抛射事件.提出了一种描述事件外环运动的经验模型,把环的观测外形表达为在运动坐标系中的Cassini函数.环的发展过程分为两个阶段:在前一阶段,外环处于冕流对盔状结构之间,事件的发展以角宽度膨胀为主,其对称轴从赤道向北纬方向移动;径向膨胀和上升速度较低,加速效应明显.在后一阶段,外环越过冕流盔状结构所在高度,角膨胀趋于停止;运动接近于等角宽度和纯径向匀速的膨胀和上升运动.当外环向外运动时,其顶部和几何中心的高度均随时间而增加,但其底部高度基本上保持不变.根据上述观测特征,讨论了事件形成的可能机制.
Other AbstractThe CME event on May 6,1980,occurring between a pair of coronal streamers,is discussed in this paper.An empirical kinematical model is proposed for describing the motion of outer loop of the event,n which the observed profile of loop is fitted in terms of the Cassini function in a moving coordinate system.The development of the loop can be distinguished into two different phases.During the first phase,when the loop lay between the helmet structures of streamer pair,the development of event is dominated by expansion of angular width with the asymmetrical axis shifting to norxhern latitudes; the speed of radial expansion and outward motion were rather low with remarkable acceleration.During the second phase, when the outer loop moved beyond the height of helmet structure of coronal sxreamer, the angular expansion ceased; the motion approached to an expanslion and lift mainly in the radial direction with uniform speed and invariable angular width. As the loop moved outward, both the top and center heights increased with time, however, the bottom remained nearly fixed. Based on xhe above observational characteristics, a possible mechanism is pux forward for the formation of the event.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1220
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
章公亮,北京8701信箱. 两冕流间的对称径向膨胀日冕物质抛射事件[J]. 空间科学学报,1995,15(4):253-262.
APA 章公亮,&北京8701信箱.(1995).两冕流间的对称径向膨胀日冕物质抛射事件.空间科学学报,15(4),253-262.
MLA 章公亮,et al."两冕流间的对称径向膨胀日冕物质抛射事件".空间科学学报 15.4(1995):253-262.
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