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嵌套闭磁场结构内CME产生和传播的数值模拟
Alternative TitleNumerical Simulation of CME Initiation and Propagation From a Streamer Containing Nested Close Magnetic Field Structures
叶占银; 魏奉思; 王赤; 冯学尚; 钟鼎坤; 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
2005
Volume25Issue:4Pages:241-247
ISSN0254-6124
Language中文
Keyword太阳风 日冕物质抛射 mhd方程组
Abstract给出了特殊类型的日冕物质抛射(CME)数值模拟定性结果,这种CME核心闭磁场结构前半部分磁力线的方向与太阳整体偶极场磁力线的方向相反.计算结果表明,这种CME核心闭磁场结构磁力线与太阳整体偶极场反向磁力线之间存在过渡磁场结构,在向外传播时过渡磁场结构所占的面积逐渐增大.这一结果可以用来解释飞船为什么能够观测到一类双极磁云,这类磁云前半部分磁场方向与太阳整体偶极场方向相反.为了模拟这一数值结果,强调需要采用包含嵌套闭磁场的冕流背景结构,并在合适的位置触发CME.
Other AbstractCaualitative numerical result of a special type of Coronal Mass Ejection (CME) is pre-sented. The magnetic field direction in front half part of central closed magnetic field of the CME is opposite to that of the solar global dipole. Numerical result shows that: between the two anti-directional magnetic field lines of the CME magnetic field and the solar global dipole, there exists a transitional magnetic field structure, the area scale of which becomes gradually large when CME propagates outward. The numerical result may explain why spacecrafts can observe a type of bipolar magnetic cloud, in front half of which, the magnetic field direction is opposite to that of the solar global dipole. To obtain the numerical result, a background streamer with nested close magnetic field lines in it plays a central role for the CME initiation and propagation. The background steady state solution is approached by a long time interaction between a potential magnetic field and Parker solar wind solution. The potential magnetic field is obtained by properly combining a dipole and a hexapole. Because for the dipole, interaction between the potential magnetic field and solar wind can not open the dipole up and a streamer containing nested close magnetic field structures for triggering the CME at a suitable position forms finally.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1412
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
叶占银,魏奉思,王赤,等. 嵌套闭磁场结构内CME产生和传播的数值模拟[J]. 空间科学学报,2005,25(4):241-247.
APA 叶占银,魏奉思,王赤,冯学尚,钟鼎坤,&北京8701信箱.(2005).嵌套闭磁场结构内CME产生和传播的数值模拟.空间科学学报,25(4),241-247.
MLA 叶占银,et al."嵌套闭磁场结构内CME产生和传播的数值模拟".空间科学学报 25.4(2005):241-247.
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