A solar eruption triggered by merge interactions of different helicity loops

A solar eruption triggered by merge interactions of different helicity loops
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由不同螺旋度环的合并相互作用引发的太阳喷发

DOI:
10.1051/0004-6361:200809813
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发表时间:
2008-07
影响因子:
6.5
通讯作者:
X. Feng
X. Feng
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
F. Shen;W. Song,;X. Feng

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目标。我们研究了耀斑/CME源区的磁演化,以确定耀斑和EUV增亮事件的触发因素。此外,我们还讨论了电流螺旋度(hc)在太阳活动中的作用。方法.我们使用SOHO/MDI磁图和TRACE 195 A图像的超活动区(AR),NOAA AR 8375的长持续时间序列。本文研究了光球层和日冕中的磁场变化。结果在AR 8375中,上覆环(hc 0)的西南和西北部分以及出现的通量区(hc > 0)。两次碰撞使重叠的环在反弹相互作用中膨胀。然而,相关的太阳事件是由合并相互作用触发的,这种相互作用发生在上升磁弧的纤维之间以及覆盖环的纤维之间。
Aims. We investigate the magnetic evolution of a flare/CME source region to determine the trigger of the flare and the EUV brightening event. Also, we discuss the role of the current helicity (hc) in solar activity. Methods. We use the long duration sequences of SOHO/MDI magnetograms and TRACE 195 A images for a super active region (AR), NOAA AR 8375. Magnetic field changes in the photosphere and the corona are investigated. Results. In AR 8375, the southwestern and northwestern parts of an overlying loop (hc 0) and the emerging flux region (hc > 0). Two collisions make the overlying loop inflate in a bounce interaction. However, the related solar events are triggered by a merge interaction which takes place among the fibers of the rising magnetic arcades and among those of the overlying loop.
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发表时间: 2001-09
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影响因子: 2.8
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