SELF-ORGANIZED BRAIDING AND THE STRUCTURE OF CORONAL LOOPS
SELF-ORGANIZED BRAIDING AND THE STRUCTURE OF CORONAL LOOPS
复制标题
自组织编织和冠状环结构
DOI：
10.1088/0004-637x/705/1/347
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
M. Asgari
中科院分区：
文献类型：
--
作者：
M. Berger;M. Asgari
日冕加热的帕克模型包括编织的磁通量元件的重新连接。大多数编织被认为是在尚未分辨的尺度上发生的，例如，在极端紫外线或X射线环内编织线条。然而，在TRACE或Hinode可以接触到的鳞片上，可能仍然可以看到一些辫子。我们建议，在估计这些尺度上的编织量时，必须考虑编织结构的一致性程度。在这篇文章中，我们研究了重联对编织磁场结构的影响。我们证明了平衡拓扑结构输入和重联的编织磁场的简单模型演化到自组织临界态。最初的随机辫子可以变得高度有序，相干长度服从幂函数分布。在重新连接过程中释放的能量也遵循幂定律。我们的模型给出了更频繁(但更小)的能量释放，更接近日冕环的末端。
The Parker model for heating of the solar corona involves reconnection of braided magnetic flux elements. Much of this braiding is thought to occur at as yet unresolved scales, for example, braiding of threads within an extreme-ultraviolet or X-ray loop. However, some braiding may be still visible at scales accessible to TRACE or Hinode. We suggest that attempts to estimate the amount of braiding at these scales must take into account the degree of coherence of the braid structure. In this paper, we examine the effect of reconnection on the structure of a braided magnetic field. We demonstrate that simple models of braided magnetic fields which balance the input of topological structure with reconnection evolve to a self-organized critical state. An initially random braid can become highly ordered, with coherence lengths obeying power-law distributions. The energy released during reconnection also obeys a power law. Our model gives more frequent (but smaller) energy releases nearer to the ends of a coronal loop.
DOI：
10.1088/0004-637x/696/2/1339
发表时间：
2008-10
期刊：
The Astrophysical Journal
影响因子：
--
作者：
A. Wilmot-Smith;G. Hornig;D. Pontin
通讯作者：
A. Wilmot-Smith;G. Hornig;D. Pontin