Formation of Ellerman bombs due to 3D flux emergence

Formation of Ellerman bombs due to 3D flux emergence
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由于 3D 通量的出现而形成埃勒曼炸弹

DOI:
10.1051/0004-6361/200912455
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发表时间:
2009
影响因子:
6.5
通讯作者:
Archontis V
Archontis V
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Archontis V

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AimsWe调查的出现“海蛇”磁场到太阳大气层外和起伏的磁力线之间的连接和形成Ellerman bombs.MethodsWe进行3D数值实验求解的时间依赖性和电阻MHD equations.ResultsA亚光球磁通量片发展波动由于帕克不稳定性。它从对流不稳定的次光球层上升,并通过沿着起伏系统的连续重连事件进入高度层结的大气。具有埃勒曼炸弹特征的增亮是由于重连而产生的,重连发生在磁场出现期间。在系统演化的高级阶段,电阻出现导致形成长的拱形磁场,扩展到日冕。文中还讨论了低层大气磁场的增强和新磁通量的出现。
AimsWe investigate the emergence of a “sea-serpent” magnetic field into the outer solar atmosphere and the connection between undulating fieldlines and formation of Ellerman bombs.MethodsWe perform 3D numerical experiments solving the time-dependent and resistive MHD equations.ResultsA sub-photospheric magnetic flux sheet develops undulations due to the Parker instability. It rises from the convectively unstable sub-photospheric layer and emerges into the highly stratified atmosphere through successive reconnection events along the undulating system. Brightenings with the characteristics of Ellerman bombs are produced due to reconnection, which occurs during the emergence of the field. At an advanced stage of the evolution of the system, the resistive emergence leads to the formation of long, arch-like magnetic fields that expand into the corona. The enhancement of the magnetic field at the low atmosphere and episodes of emergence of new magnetic flux are also discussed.
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