Observing the release of twist by magnetic reconnection in a solar filament eruption.
Observing the release of twist by magnetic reconnection in a solar filament eruption.
复制标题
观察太阳灯丝喷发中磁重联释放扭曲
DOI：
10.1038/ncomms11837
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发表时间：
2016-06-16
影响因子：
16.6
通讯作者：
Zhao L
中科院分区：
文献类型：
--
作者：
Xue Z;Yan X;Cheng X;Yang L;Su Y;Kliem B;Zhang J;Liu Z;Bi Y;Xiang Y;Yang K;Zhao L
磁场重联是一个拓扑变化和能量释放的基本过程，发生在太阳等离子体中，在太空中，在天体物理物体和实验室中。然而，观察证据相对较少，通常只是部分。在这里，我们提出了快速重联的证据，在太阳灯丝喷发使用高分辨率的H-阿尔法图像从新的真空太阳望远镜，补充极紫外线观测。重新连接被认为是发生在一组周围色球原纤维和灯丝本身之间。这允许通过解扭运动来放松细丝中的磁张力，展示了通量绳结构。结合磁流体动力学模拟，通过非线性无力场模型的活动区域的拓扑结构的变化和解扭也被发现。这些结果证明了太阳爆发中重联的一个新作用：磁扭曲的释放。
Magnetic reconnection is a fundamental process of topology change and energy release, taking place in plasmas on the Sun, in space, in astrophysical objects and in the laboratory. However, observational evidence has been relatively rare and typically only partial. Here we present evidence of fast reconnection in a solar filament eruption using high-resolution H-alpha images from the New Vacuum Solar Telescope, supplemented by extreme ultraviolet observations. The reconnection is seen to occur between a set of ambient chromospheric fibrils and the filament itself. This allows for the relaxation of magnetic tension in the filament by an untwisting motion, demonstrating a flux rope structure. The topology change and untwisting are also found through nonlinear force-free field modelling of the active region in combination with magnetohydrodynamic simulation. These results demonstrate a new role for reconnection in solar eruptions: the release of magnetic twist.