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arXiv 1402.6891astro-ph.SR
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2011年2月14-15日事件的CME-CME相互作用过程的不对称性

Asymmetry in the CME-CME interaction process for the events from 2011 February 14-15

M. Temmer, A. M. Veronig, V. Peinhart, B. Vrsnak

摘要:

详细研究了2011年2月14日(CME 1)和2月15日(CME 2)发生的两次日冕物质抛射(CME)的相互作用过程。重建的三维形状和演变的磁通绳,我们验证了这两个CME相互作用。沿不同的位置角(PA)在整个纬度范围内测量的两个日冕物质抛射的正面结构,揭示了相互作用的侧翼和顶点的运动学差异。的相互作用过程是强烈的PA依赖的定时以及运动学的演变。中心相互作用发生在PA-100°,这显示出最强的运动学变化。在相互作用期间,CME 1从~400 km/s加速到~700 km/s,CME 2从~1300 km/s减速到~600 km/s。我们的结果表明,一个简化的情况下,如非弹性碰撞可能不足以描述CME-CME相互作用。磁通绳的磁场结构以及激波引起的动量传递在相互作用过程中起着重要的作用。

英文摘要:

We present a detailed study of the interaction process of two coronal mass ejections (CMEs) successively launched on 2011 February 14 (CME1) and 2011 February 15 (CME2). Reconstructing the 3D shape and evolution of the flux ropes we verify that the two CMEs interact. The frontal structure of both CMEs measured along different position angles (PA) over the entire latitudinal extent, reveals differences in the kinematics for the interacting flanks and the apexes. The interaction process is strongly PA-dependent in terms of timing as well as kinematical evolution. The central interaction occurs along PA-100°, which shows the strongest changes in kinematics. During interaction, CME1 accelerates from ~400 km/s to ~700 km/s and CME2 decelerates from ~1300 km/s to ~600 km/s. Our results indicate that a simplified scenario like inelastic collision may not be sufficient to describe the CME-CME interaction. Magnetic field structures of the intertwining flux ropes as well as momentum transfer due to shocks play an important role in the interaction process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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