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高速太阳风条件下日侧磁层顶磁通量传输事件的全球磁流体力学模拟结果
Alternative TitleGlobal MHD Results of Flux Transfer Events at the Dayside Magnetopause under High Solar Wind Speed
陈琛; 黄朝晖; 孙天然; 唐斌斌; 王赤
Department空间科学部
Source Publication空间科学学报
2019
Volume39Issue:2Pages:149-157
ISSN0254-6124
Language中文
Keyword磁通量传输事件 高速太阳风 MHD模拟
Abstract利用全球磁流体力学模拟,研究了高速太阳风条件下日侧磁层顶的磁通量传输事件(FTE)发生率的空间分布.从模拟结果中得到了FTE信号,并且这些FTE信号的特征与观测结果基本一致.磁层顶上的10个取样点共观测到39个FTE信号.统计分析表明,越靠近翼侧则观测到的FTE信号越少.这一现象可能是磁鞘中太阳风速度分布差异导致的.
Other AbstractUsing Global MHD model, the spatial distribution of Flux Transfer Events (FTE) at the dayside magnetopause under high solar wind speed is investigated. The solar wind conditions of this case are v_(sw) =1200 km·s~(-1),n_(sw) = 3 cm~(-3), B_z = -8.3nT, B_y = 8.3 nT and B_x = 0nT. The simulation results virtually agree with those expected FTE signatures from observations, and bipolar signatures and related variations of number density, pressure and velocity are found. A total number of 39 FTE are observed by ten virtual probes which are spread over the magnetopause from y = -5R_e to y = 5R_e·14 FTE are found when the probe is near to the noon. However, when the probe is located near y = -5R_e and y = 5R_e, the same number, 3, of FTE in both locations is found. Furthermore, 8 FTE are found when the probe is adjacent to y = -2.5R_e and 11 FTE are found near y = 2.5 R_e. In a nutshell, the number of FTE decreases as the observed probes approach the flank of the magnetopause, which could be caused by the distribution of solar wind velocity in magnetosheath.
Indexed ByCSCD
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7005
Collection空间科学部
Recommended Citation
GB/T 7714
陈琛,黄朝晖,孙天然,等. 高速太阳风条件下日侧磁层顶磁通量传输事件的全球磁流体力学模拟结果[J]. 空间科学学报,2019,39(2):149-157.
APA 陈琛,黄朝晖,孙天然,唐斌斌,&王赤.(2019).高速太阳风条件下日侧磁层顶磁通量传输事件的全球磁流体力学模拟结果.空间科学学报,39(2),149-157.
MLA 陈琛,et al."高速太阳风条件下日侧磁层顶磁通量传输事件的全球磁流体力学模拟结果".空间科学学报 39.2(2019):149-157.
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