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环状日冕物质抛射事件的数值模拟
Alternative TitleNumerical Simulation of Loop-like Coronal Mass Ejection
王赤; 章公亮; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication中国科学院研究生院学报
1995
Volume12Issue:2Pages:178-184
ISSN1002-1175
Language中文
Keyword磁场 太阳风 日冕物质抛射
Abstract在对二维理想磁流体力学方程组采用多步隐格式进行数值处理后,利用长时间渐近方法计算得到了太阳风的盔状流动解。并以较切合实际的解作为背景初态,对盔状冕流底部磁通量喷发的大气响应进行了数值模拟。结果表明:在新的扰动磁场作用下,原冕流底部的物质将受到压缩并向上运动,形成高密度亮环结构,在环的下方出现低密度暗腔;在环的顶部向外运动过程的同时,其足部几乎保持不动。模拟结果再现了环状日冕物质抛射的主要观测特征。数值结果还表明了向外流动的太阳风,有助于环状高密度结构向行星际空间传播,并得到了与观测结果相近的环的运动速度。
Other AbstractAfter treating the two-dimensional ideal MHD equations with a multistep implicit scheme, we obtained a helmet streamer solution of the solar wind near the sun by use of the numerical method. Using this solution as initial state, we presented a numerical simulation of the solar atmospheric response to a magnetic flux eruption from the base of the helmet streamer. The numerical results showed that the material contained originally in the streamer is compressed and lifted upward by the new erupting magnetic field, forming a high density bright loop, and a dark resign with low density come out below it. The density enhancement is more apparent in the flank than in the top.While the top of the loop propagating outside from the sun, the foot of it stood still. The results demonstrated the main observed characteristics of the loop-like coronal mass ejection. In addition, the solar wind flowing outside helped the loop-like high density structure propagate into the interplanetary space, and the velocitof the loop obtained by the simulation is near to that observed.
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/122/1209
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
王赤,章公亮,北京8701信箱. 环状日冕物质抛射事件的数值模拟[J]. 中国科学院研究生院学报,1995,12(2):178-184.
APA 王赤,章公亮,&北京8701信箱.(1995).环状日冕物质抛射事件的数值模拟.中国科学院研究生院学报,12(2),178-184.
MLA 王赤,et al."环状日冕物质抛射事件的数值模拟".中国科学院研究生院学报 12.2(1995):178-184.
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