Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport
Tracking of magnetic flux concentrations over a five-day observation, and an insight into surface magnetic flux transport
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在五天的观察中跟踪磁通量浓度，并深入了解表面磁通量传输
DOI：
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发表时间：
2016
期刊：
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通讯作者：
Yusuke Iida
中科院分区：
文献类型：
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作者：
Yusuke Iida
太阳发电机问题是太阳磁场的周期性变化如何维持的问题。其中一个重要的过程是通过表面对流传输磁通量。为了揭示这一过程，磁通量集中的平方位移对经过的时间的依赖关系，本文研究通过特征识别技术和连续五天的磁图。这是迄今为止对这一问题进行卫星观测的最长时间尺度。的依赖性被发现遵循幂律和显着不同的扩散运输。此外，在103.8公里的空间尺度上的行为发生了变化。在较小尺度下，指数为1.4的超扩散行为，而在较大尺度上，指数为0.6的次扩散行为。我们解释这种差异的运输制度来自网络流模式。
The solar dynamo problem is the question of how the cyclic variation in the solar magnetic field is maintained. One of the important processes is the transport of magnetic flux by surface convection. To reveal this process, the dependence of the squared displacement of magnetic flux concentrations on the elapsed time is investigated in this paper via a feature-recognition technique and a continual five-day magnetogram. This represents the longest time scale over which a satellite observation has ever been performed for this problem. The dependence is found to follow a power law and differ significantly from that of diffusion transport. Furthermore, there is a change in the behavior at a spatial scale of 103.8 km. A super-diffusion behavior with an index of 1.4 is found at smaller scales, while changing to a sub-diffusion behavior with an index of 0.6 on larger ones. We interpret this difference in the transport regime as coming from the network-flow pattern.