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arXiv 0709.1853astro-ph
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利用Hinode/SOT形成移动磁特征和半影磁场

Formation of Moving Magnetic Features and Penumbral Magnetic Fields with Hinode/SOT

Masahito Kubo, Kiyoshi Ichimoto, Toshifumi Shimizu, Saku Tsuneta, Yoshinori Suematsu, Yukio Katsukawa, Shin'ichi Nagata, Theodore D Tarbell, Richard A Shine, Al… 展开作者

Masahito Kubo, Kiyoshi Ichimoto, Toshifumi Shimizu, Saku Tsuneta, Yoshinori Suematsu, Yukio Katsukawa, Shin'ichi Nagata, Theodore D Tarbell, Richard A Shine, Alan M Title, Zoe A Frank, Bruce W Lites, David Elmore

摘要:

利用日出卫星上的太阳光学望远镜(SOT)观测到了运动磁特征(MMF)的矢量磁场。在这项研究中,我们专注于三个MMF与SOT的演变。我们发现,一个具有与太阳黑子相同极性的相对垂直场的磁磁动势从半影中分离出来,它围绕着出现在外半影中的颗粒。这表明,外半影的颗粒运动是造成太阳黑子解体的原因。两个与黑子极性相反的磁动势位于半影延伸出的水平磁场的外缘附近。这说明与黑子极性相反的磁磁动势是半影水平场的延伸。在光球层中,一些极性与黑子相反的磁磁动势的径向位移大于声速。

英文摘要:

Vector magnetic fields of moving magnetic features (MMFs) are well observed with the Solar Optical Telescope (SOT) aboard the Hinode satellite. We focus on the evolution of three MMFs with the SOT in this study. We found that an MMF having relatively vertical fields with polarity same as the sunspot is detached from the penumbra around the granules appeared in the outer penumbra. This suggests that granular motions in the outer penumbra are responsible for the disintegration of the sunspot. Two MMFs with polarity opposite to the sunspot are located around the outer edge of horizontal fields extending from the penumbra. This is an evidence that the MMFs with polarity opposite to the sunspot are prolongation of penumbral horizontal fields. Radshifts larger than sonic velocity in the photosphere are detected for some of the MMFs with polarity opposite to the sunspot.

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