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arXiv 1204.5261astro-ph.SR
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检测网络场的通量出现、分裂、合并和消除。一、拆分与合并

Detection of flux emergence, splitting, merging, and cancellation of network field. I Splitting and Merging

Y. Iida, H. Hagenaar, T. Yokoyama

摘要:

通过自动检测方法研究了超颗粒边界上磁补丁过程的频率,即磁通出现、分裂、合并和抵消。我们使用一组视线磁图采取的太阳光学望远镜(SOT)上的日之出卫星。我们在数据集中发现了1636个正斑和1637个负斑,其持续时间为3.5小时,视场为112”\times 112”。磁过程的总数如下:493个正分裂和482个负分裂,536个正合并和535个负合并,86个取消和3个出现。出现和取消的总数明显小于分裂和合并的总数。此外,合并和分裂过程的磁通量含量的频率依赖性进行了研究。合并对磁通量的依赖性很弱,只有0.28的幂律指数.发现分裂的时间尺度与分裂前的母焊剂含量无关,其对应于\sim 33分钟。它也被发现,补丁分裂成任何流量内容具有相同的概率。这种分裂具有指数为-2的通量含量的幂律分布作为与时间无关的解。这些结果支持了通量含量的频率分布在分析通量范围内迅速维持合并和分裂,即表面过程。基于这一思想,我们提出了一个消除和出现的频率分布模型。

英文摘要:

Frequencies of magnetic patch processes on supergranule boundary, namely flux emergence, splitting, merging, and cancellation, are investigated through an automatic detection. We use a set of line of sight magnetograms taken by the Solar Optical Telescope (SOT) on board Hinode satellite. We found 1636 positive patches and 1637 negative patches in the data set, whose time duration is 3.5 hours and field of view is 112" \times 112". Total numbers of magnetic processes are followed: 493 positive and 482 negative splittings, 536 positive and 535 negative mergings, 86 cancellations, and 3 emergences. Total numbers of emergence and cancellation are significantly smaller than those of splitting and merging. Further, frequency dependences of merging and splitting processes on flux content are investigated. Merging has a weak dependence on flux content only with a power- law index of 0.28. Timescale for splitting is found to be independent of parent flux content before splitting, which corresponds to \sim 33 minutes. It is also found that patches split into any flux contents with a same probability. This splitting has a power-law distribution of flux content with an index of -2 as a time independent solution. These results support that the frequency distribution of flux content in the analyzed flux range is rapidly maintained by merging and splitting, namely surface processes. We suggest a model for frequency distributions of cancellation and emergence based on this idea.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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