太阳大气层的DOT层析成像。IV。互联网区域中的磁性贴片
DOT tomography of the solar atmosphere. IV. Magnetic patches in internetwork areas
摘要：
我们使用G-波段和钙II H图像序列从荷兰开放望远镜（DOT）研究磁性元素，出现在安静的太阳光球和色球的互联网部分的亮点。我们发现，这些亮点中的许多出现周期性变化的强度和水平运动的寿命较长的磁补丁。我们开发了一个算法检测的补丁，并发现所有补丁识别的持续时间远远长于颗粒。补丁概述细胞模式的中颗粒尺度，表明磁通量管平流颗粒流中颗粒边界。对斑块出现和消失的统计分析表明，斑块的平均寿命长达530 ± 50 min（约9小时），这表明构成强网络场的磁性元素不是由局部湍流发电机产生的。
英文摘要：
We use G-band and Ca II H image sequences from the Dutch Open Telescope (DOT) to study magnetic elements that appear as bright points in internetwork parts of the quiet solar photosphere and chromosphere. We find that many of these bright points appear recurrently with varying intensity and horizontal motion within longer-lived magnetic patches. We develop an algorithm for detection of the patches and find that all patches identified last much longer than the granulation. The patches outline cell patterns on mesogranular scales, indicating that magnetic flux tubes are advected by granular flows to mesogranular boundaries. Statistical analysis of the emergence and disappearance of the patches points to an average patch lifetime as long as 530+-50 min (about nine hours), which suggests that the magnetic elements constituting strong internetwork fields are not generated by a local turbulent dynamo.
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