Numerical research on the interaction between coronal mass ejection and streamer  

作　　者：叶占银 魏奉思 冯学尚 石勇 姚久胜 

出　　处：《Science China(Technological Sciences)》2002年第2期206-212,共7页中国科学（技术科学英文版）

基　　金：This work is jointly supported by the National -Natural Science Foundation of China ( Grant Nos. 49990450, 49925412, 40104008) and the National Key Basic Research Science Foundation (Grant No G2000078405) .

摘　　要：By proposing a two-dimensional triggering model with concentrically circular closed magnetic field line structure,numerical research is made on the asymmetric propagation feature of coronal mass ejection (CME) in two cases emerging at the solar northern latitudes 10° and 45° respectively.The numerical results can qualitatively explain some features of CME event observed by the spacecraft SOHO and show that:(i) In these two cases,the triggering model can initiate CME with an asymmetric closed magnetic field structure.(ii) Closed magnetic structure of CME event will keep deflecting to the current sheet when it propagates away from the sun and this deflecting effect mostly happens within tens of solar radii before CME travels finally along the current sheet.(iii) The triggering model emerging at different locations can introduce CME events with different magnetic shapes.This shape happens to be circular and crescent when the triggering model emerges at the northern latitudes 10° and 45°,respectively.By proposing a two-dimensional triggering model with concentrically circular closed magnetic field line structure, numerical research is made on the asymmetric propagation feature of coronal mass ejection (CME) in two cases emerging at the solar northern latitudes 10° and 45° respectively. The numerical results can qualitatively explain some features of CME event observed by the spacecraft SOHO and show that: (i) In these two cases, the triggering model can initiate CME with an asymmetric closed magnetic field structure. (ii) Closed magnetic structure of CME event will keep deflecting to the current sheet when it propagates away from the sun and this deflecting effect mostly happens within tens of solar radii before CME travels finally along the current sheet. (iii) The triggering model emerging at different locations can introduce CME events with different magnetic shapes. This shape happens to be circular and crescent when the triggering model emerges at the northern latitudes 10° and 45°, respectively.

关 键 词：solar wind CME event numerical simulation MHD. 

分 类 号：P182[天文地球—天文学]