THREE-DIMENSIONAL SIMULATIONS OF MAGNETOHYDRODYNAMIC WAVES IN MAGNETIZED SOLAR ATMOSPHERE
THREE-DIMENSIONAL SIMULATIONS OF MAGNETOHYDRODYNAMIC WAVES IN MAGNETIZED SOLAR ATMOSPHERE
复制标题
DOI：
10.1088/0004-637x/755/1/18
复制
发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
G. Vigeesh;G. Vigeesh;V. Fedun;S. Hasan;R. Erdélyi
中科院分区：
文献类型：
--
作者：
G. Vigeesh;G. Vigeesh;V. Fedun;S. Hasan;R. Erdélyi
给出了磁流体波在太阳磁通管中传播的三维数值模拟结果。我们的研究旨在了解由不同光球运动产生的一系列MHD波模的性质。我们考虑了在较低的太阳光球中观察到的两种情况，即颗粒抖动和涡状运动，它们是在强的局域磁通量集中内产生波的最简单的机制之一。我们发现，与涡流运动相比，颗粒抖动可能会产生更强的慢磁声波和快磁声波。相应地，由于驱动运动的不同，所传输的能量通量也不同。我们还证明了由颗粒抖动产生的波很可能在色球网络中表现为更强的发射。我们认为，在晶间通道中磁性元素的演化过程中，不同的波产生机制是活跃的，导致色球高度的发射随时间变化。
We present results of three-dimensional numerical simulations of magnetohydrodynamic (MHD) wave propagation in a solar magnetic flux tube. Our study aims at understanding the properties of a range of MHD wave modes generated by different photospheric motions. We consider two scenarios observed in the lower solar photosphere, namely, granular buffeting and vortex-like motion, among the simplest mechanism for the generation of waves within a strong, localized magnetic flux concentration. We show that granular buffeting is likely to generate stronger slow and fast magnetoacoustic waves as compared to swirly motions. Correspondingly, the energy flux transported differs as a result of the driving motions. We also demonstrate that the waves generated by granular buffeting are likely to manifest in stronger emission in the chromospheric network. We argue that different mechanisms of wave generation are active during the evolution of a magnetic element in the intergranular lane, resulting in temporally varying emission at chromospheric heights.