标题： 太阳耀斑电流片中的三维湍流重联 显示英文标题

标题： Three-dimensional Turbulent Reconnection within Solar Flare Current Sheet

摘要： 太阳耀斑能够以爆炸性方式释放日冕磁场能量，并可能影响近地空间环境的安全。其宏观结构和性质已通过普遍接受的基于磁重联理论的二维标准模型成功解释。然而，一些由近期高分辨率观测发现的重要动力学特征仍然难以捉摸。 在此，我们报告了一项关于耀斑电流片内湍流磁重联的一致性高分辨率三维磁流体力学模拟。研究发现，电流片以及耀斑环顶区域自发生成了不同尺度的碎片化电流斑块，并具有发达的湍流频谱。撕裂模和Kelvin-Helmholtz不稳定性之间的紧密耦合在发展湍流重联及形成与实际观测一致的动力学结构方面起着关键作用。这一复杂的建模使传统模型向统一不同尺度耀斑动力学结构的三维湍流重联模型发生了范式转变。 显示英文摘要

摘要： Solar flares can release coronal magnetic energy explosively and may impact the safety of near-earth space environments. Their structures and properties on macroscale have been interpreted successfully by the generally-accepted two-dimension standard model invoking magnetic reconnection theory as the key energy conversion mechanism. Nevertheless, some momentous dynamical features as discovered by recent high-resolution observations remain elusive. Here, we report a self-consistent high-resolution three-dimension magnetohydrodynamical simulation of turbulent magnetic reconnection within a flare current sheet. It is found that fragmented current patches of different scales are spontaneously generated with a well-developed turbulence spectrum at the current sheet, as well as at the flare loop-top region. The close coupling of tearing-mode and Kelvin-Helmholtz instabilities plays a critical role in developing turbulent reconnection and in forming dynamical structures with synthetic observables in good agreement with realistic observations. The sophisticated modeling makes a paradigm shift from the traditional to three-dimension turbulent reconnection model unifying flare dynamical structures of different scales.