论文标题
辐射磁流体动力学模拟中三角型黑子中超强水平磁场的形成
Formation of super-strong horizontal magnetic field in delta-type sunspot in radiation magnetohydrodynamic simulations
论文作者
论文摘要
我们执行一系列辐射磁水动力学模拟，以了解三角型黑子中异常强的水平磁场的放大机理。在模拟中，我们成功地重现了三角型黑子，并在正极和负极性之间的光桥上产生的强磁场超过6000 g。我们在这项研究中的结论总结如下： 1。强水平磁场的基本扩增机理是由两个斑点旋转引起的剪切运动。 2。强水平磁场保持无力状态。 3。磁场的峰值强度不取决于空间分辨率，最高边界条件或Alfven速度极限。 旋转运动的起源植根于深对流区。 因此，可以将增量点灯桥中的磁场放大到光球中的超级标题值。
We perform a series of radiative magnetohydrodynamic simulations to understand the amplification mechanism of the exceptionally strong horizontal magnetic field in delta-type sunspots. In the simulations, we succeed in reproducing the delta-type sunspot and resulting strong magnetic field exceeding 6000 G in a light bridge between the positive and negative polarities. Our conclusions in this study are summarized as follows: 1. The essential amplification mechanism of the strong horizontal magnetic field is the shear motion caused by the rotation of two spots. 2. The strong horizontal magnetic field remains the force-free state. 3. The peak strength of the magnetic fields does not depend on the spatial resolution, top boundary condition, or Alfven speed limit. The origin of the rotating motion is rooted in the deep convection zone. Therefore, the magnetic field in the delta-spot light bridge can be amplified to the superequipartition values in the photosphere.
