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首页> 外文会议>Second Solar Cycle and Space Weather Euroconference Sep 24-29, 2001 Vico Equense, Italy >NUMERICAL MODELING OF CME INITIATION AND PROPAGATION
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NUMERICAL MODELING OF CME INITIATION AND PROPAGATION

机译：CME起始和传播的数值模拟

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摘要

The shocks in the solar corona caused by fast Coronal Mass Ejections (CMEs) and the shock at the Earth's magnetosphere caused by the corresponding magnetic clouds (superposed on the solar wind) are studied in the framework of computational magnetohydrodynamics (MHD). Due to the presence of three characteristic velocities and the anisotropy induced by the magnetic field, MHD shocks can have a complicated structure including secondary shock fronts, overcompressive and compound shocks, etc. Numerical simulations show that CME shocks (in the lower corona) and the shock at the Earth's magnetosphere (at times of the impact of a magnetic cloud) have such a complex structure. The CME shocks are important for 'space 'weather' because they can easily be observed in radio wavelengths. This makes it possible to track the position of the CMEs/magnetic clouds and, hence, to follow their propagation through the corona. The collision of two such shocks is discussed. Also, the possibility of locating the magnetic cloud from the passage of a satellite through the leading shock front is discussed. Moreover, the topology of the shock at the Earth's magnetosphere at the impact of a magnetic cloud is important for the 'geo-effectiveness' of the magnetic storms. Hence, a detailed study of the MHD shocks generated by CMEs may reveal some of the key properties of Space Weather.
机译：在计算磁流体动力学（MHD）框架内研究了由快速日冕质量抛射（CME）引起的太阳日冕的冲击和由相应的磁云（叠加在太阳风上）引起的地球磁层的冲击。由于存在三个特征速度和磁场感应的各向异性，MHD震荡可能具有复杂的结构，包括二次震荡锋，过压缩震荡和复合震荡等。数值模拟表明，CME震荡（在下部电晕中）和地球磁层的震动（在磁云撞击时）具有如此复杂的结构。 CME冲击对于“太空”天气非常重要，因为它们很容易在无线电波长中观察到。这使得可以跟踪CME /磁云的位置，从而跟踪它们在电晕中的传播。讨论了两个这样的冲击的碰撞。此外，还讨论了从卫星通过超前激波前部定位磁云的可能性。此外，在磁云的冲击下，地球磁层的震动拓扑对于磁暴的“地质效应”很重要。因此，对CME产生的MHD冲击的详细研究可能会揭示出Space Weather的一些关键特性。

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