MHD simulation of the Bastille day event

MHD simulation of the Bastille day event
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巴士底日事件的 MHD 模拟

DOI:
10.1063/1.4943803
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发表时间:
2016
期刊:
--
影响因子:
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通讯作者:
P. Riley
P. Riley
中科院分区:
--
文献类型:
--
作者:
J. Linker;T. Török;C. Downs;R. Lionello;V. Titov;R. Caplan;Z. Mikić;P. Riley

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我们描述了一个随时间变化的,热力学的,三维MHD模拟的2000年7月14日日冕物质抛射(CME)和耀斑。模拟开始与背景电晕开发使用MDI派生的磁性地图的边界条件。通量绳使用修改后的Titov-Demoulin(TDm)模型被用来激励事件前的活动区域,然后不稳定的光球流,取消附近的极性反转线的通量。在模拟的喷发中,超过1033尔格被冲动地释放,以1500 km/s的速度驱动CME,接近观测到的1700 km/s的速度。 模拟中的耀斑后辐射在形态上与观测到的耀斑后环相似。传播到1 Au的通量绳与在1 Au观测到的通量绳的特征相似,但模拟的ICME中心经过地球以北15°。
We describe a time-dependent, thermodynamic, three-dimensional MHD simulation of the July 14, 2000 coronal mass ejection (CME) and flare. The simulation starts with a background corona developed using an MDI-derived magnetic map for the boundary condition. Flux ropes using the modified Titov-Demoulin (TDm) model are used to energize the pre-event active region, which is then destabilized by photospheric flows that cancel flux near the polarity inversion line. More than 1033 ergs are impulsively released in the simulated eruption, driving a CME at 1500 km/s, close to the observed speed of 1700km/s. The post-flare emission in the simulation is morphologically similar to the observed post-flare loops. The resulting flux rope that propagates to 1 AU is similar in character to the flux rope observed at 1 AU, but the simulated ICME center passes 15° north of Earth.