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arXiv 1407.4573astro-ph.SR
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半影形成的形态学研究

Morphological study of penumbral formation

Reizaburo Kitai, Hiroko Watanabe, Ken'ichi Otsuji

摘要:

半影是围绕着相对较大和成熟黑子的本影的主要水平磁场区域。本文对NOAA 10978的半影形成进行了观测研究,在SOT/Hinode的G波段图像上观测到了几个半影形成。由于Hinode的连续观测,我们可以从形态上跟踪太阳黑子的演化,并发现半影形成有几条途径:(1)磁通量的活跃积累,(2)磁场的快速出现,(3)扭曲或旋转的磁管的出现。在所有这些情况下,预期磁场在通量管浓度的边缘处维持比向下磁泵浦的特征增长时间更长的高倾斜。

英文摘要:

Penumbrae are known to be area of mainly horizontal magnetic field surrounding umbrae of relatively large and mature sunspots. In this paper, we observationally studied the formation of penumbrae in NOAA10978, where several penumbral formations were observed in G-band images of SOT/Hinode. Thanks to the continuous observation by Hinode, we could morphologically follow the evolution of sunspots and found that there are several paths to the penumbral formation: (1) Active accumulation of magnetic flux, (2) Rapid emergence of magnetic field, and (3) Appearance of twisted or rotating magnetic tubes. In all of these cases, magnetic fields are expected to sustain high inclination at the edges of flux tube concentration longer than the characteristic growth time of downward magnetic pumping.

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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