The configuration and failed eruption of a complex magnetic flux rope above a δ sunspot region
The configuration and failed eruption of a complex magnetic flux rope above a δ sunspot region
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δ 太阳黑子区域上方复杂磁通绳的配置和失败喷发
DOI：
10.1051/0004-6361/202140277
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发表时间：
2021
影响因子：
6.5
通讯作者：
Jun Cui
中科院分区：
文献类型：
--
作者：
Lijuan Liu;Jiajia Liu;Jun Chen;Yuming Wang;Guoqiang Wang;Zhenjun Zhou;Jun Cui
AimsWe的目标是调查的配置复杂的磁通绳以上的δ太阳黑子区域在美国国家海洋和大气管理局AR 11515和它的爆发性膨胀在一个封闭的M5.3级flaer.MethodsWe研究了形成的δ太阳黑子使用的连续强度图像和光球矢量磁图提供的日震和磁成像仪上的太阳动力学天文台（SDO）。我们利用SDO上的大气成像组件提供的极紫外和紫外图像以及Ramaty高能太阳光谱成像仪记录的硬X射线辐射来研究喷发细节。利用非线性无力场（NLFFF）方法从光球场外推日冕磁场，并在此基础上通过计算扭曲数Two和挤压因子Q来识别磁绳。结果两个新出现的黑子群碰撞形成δ黑子。在本影和半影之间的碰撞位置形成秃斑（BP）配置，在其上方识别出复杂的通量绳结构。磁绳具有多层结构，一端紧凑，另一端分叉成不同的分支。它有一个不均匀的Twprofile，从核心到边界减少。最外面的一层仅仅被剪切。零点位于磁通绳上方。爆发过程包括在av形日冕结构的前体耀斑，灯丝的上升，并在灯丝下面的增亮，对应的拓扑结构，包括一个更高的零点，通量绳，和BP和双曲线通量管（HFT）下面的通量绳推导出的NLFFF。两套耀斑后的环和三个耀斑带在δ黑子区进一步支持的分叉配置的磁通rope.ConclusionsCombining的观测和磁场外推，我们得出结论，前重联，这发生在零点，削弱了覆盖的约束，让磁通rope上升，拟合breakout模型。主相重连（可能发生在BP或HFT）有助于磁通绳上升。结果表明，δ点配置提供了一个易于形成复杂磁配置的环境，这些磁配置共同作用产生活动。
AimsWe aim to investigate the configuration of a complex flux rope above theδsunspot region in the National Oceanic and Atmospheric Administration AR 11515 and its eruptive expansion during a confined M5.3-class flare.MethodsWe studied the formation of theδsunspot using the continuum intensity images and photospheric vector magnetograms provided by the Helioseismic and Magnetic Imager on-board the Solar Dynamics Observatory (SDO). We employed the extreme-ultraviolet and ultraviolet images provided by the Atmospheric Imaging Assembly on-board SDO and the hard X-ray emission recorded by theReuven RamatyHigh-Energy Solar Spectroscopic Imager to investigate the eruptive details. The coronal magnetic field is extrapolated from the photospheric field using a nonlinear force free field (NLFFF) method, based on which the flux rope is identified through calculating the twist numberTwand squashing factorQ. We searched the null point via a modified Powell hybrid method.ResultsThe collision between two newly emerged spot groups form theδsunspot. A bald patch (BP) configuration forms at the collision location between one umbra and the penumbra, above which a complex flux rope structure is identified. The flux rope has a multilayer configuration, with one compact end and the other end bifurcating into different branches. It has a non-uniformTwprofile, which decreases from the core to the boundary. The outmost layer is merely sheared. A null point is located above the flux rope. The eruptive process consists of precursor flarings at av-shaped coronal structure, rise of the filament, and brightening below the filament, corresponding well with the topological structures deduced from the NLFFF, including a higher null point, a flux rope, and a BP and a hyperbolic flux tube (HFT) below the flux rope. Two sets of post-flare loops and three flare ribbons in theδsunspot region further support the bifurcation configuration of the flux rope.ConclusionsCombining the observations and magnetic field extrapolation, we conclude that the precursor reconnection, which occurs at the null point, weakens the overlying confinement to allow the flux rope to rise, fitting the breakout model. The main phase reconnection, which may occur at the BP or HFT, facilitates the flux rope rising. The results suggest that theδspot configuration presents an environment prone to the formation of complex magnetic configurations that work together to produce activities.