MULTIWAVELENGTH OBSERVATIONS OF A PARTIALLY ERUPTIVE FILAMENT ON 2011 SEPTEMBER 8
MULTIWAVELENGTH OBSERVATIONS OF A PARTIALLY ERUPTIVE FILAMENT ON 2011 SEPTEMBER 8
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DOI：
10.1088/0004-637x/805/1/4
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Q. M. Zhang;Z. Ning;Y. Guo;T. Zhou;X. Cheng;H. Ji;L. Feng;T. Wiegelmann
中科院分区：
文献类型：
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作者：
Q. M. Zhang;Z. Ning;Y. Guo;T. Zhou;X. Cheng;H. Ji;L. Feng;T. Wiegelmann
本文报道了2011年9月8日NOAA活动区（AR）11283部分暗条爆发事件的多波长观测结果。在AR中发现了一个磁零点以及相应的脊和分界面。在零点之下，一个剪切的拱廊支撑着沿着高度复杂和分裂的极性反转线的灯丝沿着。被激活后，S形细丝爆发，分裂成两部分。大部分以90-150 km/s的速度上升，达到最大视高度115 mm，然后以20-80 km/s的速度颠簸地返回太阳表面。在极紫外、UV和Hα波长下，可以清楚地观察到上升和下降运动。主要部分的喷发失败与M6.7级耀斑有关，该耀斑具有单一的硬X射线源。而逃逸的暗条则在东支脱离日冕之前，可能是沿着大尺度的开放磁力线，与主条分离并围绕主条旋转了101圈。逃逸部分的喷射导致了一个非常微弱的日冕物质抛射，在外日冕中以214 km s-1的视速度传播。灯丝喷发也引发了横向扭结模式振荡的相邻冠状环在同一AR。振荡的振幅和周期分别为1.6 μ m和225 s。我们的研究结果对于理解部分暗条爆发的机制具有重要意义，并为理论模型提供了新的约束条件。多波长观测还有助于空间天气预报。
In this paper, we report our multiwavelength observations of a partial filament eruption event in NOAA active region (AR) 11283 on 8 September 2011. A magnetic null point and the corresponding spine and separatrix surface are found in the AR. Beneath the null point, a sheared arcade supports the filament along the highly complex and fragmented polarity inversion line. After being activated, the sigmoidal filament erupted and split into two parts. The major part rose at speeds of 90–150 km s−1 before reaching the maximum apparent height of ∼115 Mm. Afterward, it returned to the solar surface in a bumpy way at speeds of 20–80 km s−1. The rising and falling motions were clearly observed in the extreme-ultraviolet, UV, and Hα wavelengths. The failed eruption of the main part was associated with an M6.7 flare with a single hard X-ray source. The runaway part of the filament, however, separated from and rotated around the major part for ∼1 turn at the eastern leg before escaping from the corona, probably along large-scale open magnetic field lines. The ejection of the runaway part resulted in a very faint coronal mass ejection that propagated at an apparent speed of 214 km s−1 in the outer corona. The filament eruption also triggered a transverse kink-mode oscillation of the adjacent coronal loops in the same AR. The amplitude and period of the oscillation were 1.6 Mm and 225 s. Our results are important for understanding the mechanisms of partial filament eruptions, and provide new constraints to theoretical models. The multiwavelength observations also shed light on space weather prediction.