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arXiv 1305.7263astro-ph.SR
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第一千零六十三章暗影中的诡异丝线

Unusual Filaments Inside the Umbra

Lucia Kleint, Alberto Sainz Dalda

摘要:

我们分析了AR 11302中一个黑子本影中出现的几个不寻常的结构。它们不像典型的光桥,无论是在形态上,还是在进化上。我们分析了SDO/HMI的数据,以研究它们的时间演化,Hinode/SP的光球逆温,IBIS的色球成像,SDO/AIA的覆盖日冕。光球层反转揭示了沿着这些结构的水平逆Evershed流,我们称之为本影细丝。色球图像显示了增亮和能量耗散,而日冕图像显示明亮的日冕环似乎在这些本影丝中结束。这些快速演化的特征似乎并不常见,可能与活动区的高耀斑生产力有关。他们的分析有助于理解活动区域的复杂演变。

英文摘要:

We analyze several unusual filamentary structures, which appeared in the umbra of one of the sunspots in AR 11302. They do not resemble typical light bridges, neither in morphology, nor in evolution. We analyze data from SDO/HMI to investigate their temporal evolution, Hinode/SP for photospheric inversions, IBIS for chromospheric imaging, and SDO/AIA for the overlying corona. Photospheric inversions reveal a horizontal, inverse Evershed flow along these structures, which we call umbral filaments. Chromospheric images show brightenings and energy dissipation, while coronal images indicate that bright coronal loops seem to end in these umbral filaments. These rapidly evolving features do not seem to be common, and are possibly related to the high flare-productivity of the active region. Their analysis could help to understand the complex evolution of active regions.

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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