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arXiv 1511.02489astro-ph.SR
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宁静日珥中的精细磁结构和逆流物质流的起源

Fine Magnetic Structure and Origin of Counter-Streaming Mass Flows in a Quiescent Solar Prominence

Yuandeng Shen, Yu Liu, Ying D. Liu, P. F. Chen, Jiangtao Su, Zhi Xu, Zhong Liu

摘要:

我们提出了一个静止的日珥,这是由一个垂直的和一个水平的脚包围上覆的脊椎,逆流的质量流是无处不在的日珥高分辨率的观测。当水平脚和脊柱连接到太阳能表面时,垂直脚悬挂在太阳能表面上方,并由半圆形气泡结构支撑。泡沫先是崩溃,然后在一个类似的高度重新形成,最后开始长时间的振荡。我们发现气泡边界的坍缩和振荡与气泡底部的耀斑状特征密切相关。根据观测结果,我们提出日珥应该是由一个上覆的水平脊包围着一个低洼的水平脚和一个垂直脚组成,其中水平脚是由部分沿脊延伸的较短的场线组成,其两端与太阳表面相连,而垂直足由由于脊柱场的下垂而导致的堆积的凹陷组成并且由寄生极性形成的双极磁系统支撑(即,泡沫)。垂直底足中的上升流可能是由于气泡与上覆倾角之间的分离器处的磁重联侵入持续的下降流场而形成逆流质量流的图像。此外,水平脚内的逆流流动可能是由于两端压力不平衡造成的。

英文摘要:

We present high-resolution observations of a quiescent solar prominence which was consisted of a vertical and a horizontal foot encircled by an overlying spine, and counter-streaming mass flows were ubiquitous in the prominence. While the horizontal foot and the spine were connecting to the solar surface, the vertical foot was suspended above the solar surface and supported by a semicircular bubble structure. The bubble first collapsed and then reformed at a similar height, finally, it started to oscillate for a long time. We find that the collapsing and oscillation of the bubble boundary were tightly associated with a flare-like feature located at the bottom of the bubble. Based on the observational results, we propose that the prominence should be composed of an overlying horizontal spine encircling a low-lying horizontal and a vertical foot, in which the horizontal foot was consisted of shorter field lines running partially along the spine and with the both ends connecting to the solar surface, while the vertical foot was consisted of piling-up dips due to the sagging of the spine fields and supported by a bipolar magnetic system formed by parasitic polarities (i.e., the bubble). The upflows in the vertical foot were possibly caused by the magnetic reconnection at the separator between the bubble and the overlying dips, which intruded into the persistent downflow field and formed the picture of counter-streaming mass flows. In addition, the counter-streaming flows in the horizontal foot were possibly caused by the imbalanced pressure at the both ends.

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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