A review of recent studies on coronal dynamics: Streamers, coronal mass ejections, and their interactions  

作　　者：CHEN Yao 

机构地区：[1]Institute of Space Sciences and School of Space Science and Physics, Shandong University

出　　处：《Chinese Science Bulletin》2013年第14期1599-1624,共26页

基　　金：supported by the National Natural Science Foundation of China (40825014, 40890162, 41028004 and 41274175);the National Basic Research Program of China (2012CB825601)

摘　　要：In this article I present a review of recent studies on coronal dynamics, including research progresses on the physics of coronal streamers that are the largest structure in the corona, physics of coronal mass ejections (CMEs) that may cause a global disturbance to the corona, as well as physics of CME-streamer interactions. The following topics will be discussed in depth: (1) acceleration of the slow wind flowing around the streamer considering the effect of magnetic flux tube curvature; (2) physical mechanism accounting for persistent releases of streamer blobs and diagnostic results on the temporal variability of the slow wind speed with such events; (3) force balance analysis and energy release mechanism of CMEs with a flux rope magnetohydrodynamic model; (4) statistical studies on magnetic islands along the coronal-ray structure behind a CME and the first observation of magnetic island coalescence with associated electron acceleration; and (5) white light and radio manifestations of CME-streamer interactions. These studies shed new light on the physics of coronal streamers, the acceleration of the slow wind, the physics of solar eruptions, the physics of magnetic reconnection and associated electron acceleration, the large-scale coronal wave phenomenon, as well as the physics accounting for CME shock-induced type II radio bursts.In this article I present a review of recent studies on coronal dynamics, including research progresses on the physics of coronal streamers that are the largest structure in the corona, physics of coronal mass ejections （CMEs） that may cause a global disturb- ance to the corona, as well as physics of CME-streamer interactions. The following topics will be discussed in depth： （1） accelera- tion of the slow wind flowing around the streamer considering the effect of magnetic flux tube curvature; （2） physical mechanism accounting for persistent releases of streamer blobs and diagnostic results on the temporal variability of the slow wind speed with such events; （3） force balance analysis and energy release mechanism of CMEs with a flux rope magnetohydrodynamic model; （4） statistical studies on magnetic islands along the coronal-ray structure behind a CME and the first observation of magnetic island coalescence with associated electron acceleration; and （5） white light and radio manifestations of CME-streamer interactions. These studies shed new light on the physics of coronal streamers, the acceleration of the slow wind, the physics of solar eruptions, the physics of magnetic reconnection and associated electron acceleration, the large-scale coronal wave phenomenon, as well as the physics accounting for CME shock-induced type II radio bursts.

关 键 词：日冕物质抛射 相互作用 动力学 电子加速 物理学 CME BLOB 物理机制 

分 类 号：P182.62[天文地球—天文学] O313[理学—一般力学与力学基础]