HOOKED FLARE RIBBONS AND FLUX-ROPE-RELATED QSL FOOTPRINTS
HOOKED FLARE RIBBONS AND FLUX-ROPE-RELATED QSL FOOTPRINTS
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钩状喇叭形带和与焊剂绳相关的 QSL 足迹
DOI：
10.3847/0004-637x/823/1/62
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发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
Hui Li
中科院分区：
文献类型：
--
作者：
Guillaume Aulanier;Brigitte Schmieder;Etienne Pariat;Hui Li
我们研究了 2014 年 9 月 10 日活跃区 12158 的磁拓扑，并将其与 UT 17:21 (SOL2014-09-10T17:45:00) 开始的耀斑之前和早期的观测结果进行了比较。我们的结果表明，太阳动力学天文台/大气成像组件观测到的该活动区域的 S 形结构和耀斑带可以通过 Grad-Rubin 非线性无力场外推法很好地再现。围绕日冕磁力绳的各种反 S 形和反 J 形磁场线与在不同极紫外波长下观察到的 S 形磁场线（包括其多螺纹弯曲端部）一致。此外，在未规定的磁极性中观察到的表面电流分布也得到了很好的再现。这验证了我们的 Grad-Rubin 方法的数值实现和设置。建模的双逆 J 形准分离层 (QSL) 足迹与在耀斑上升阶段观察到的耀斑带（包括其钩状部分）相匹配。后者的螺旋形状可能与模型中获得的具有多于一圈扭曲的复杂喷发前磁绳有关。这些与带状相关的通量绳 QSL 足迹与 3D 中的新标准耀斑模型一致，存在位于反泪滴形冠状 QSL 下方的双曲线通量管。这是预测太阳耀斑中重连和带状位置以及喷发通量绳几何特性的新一步。
We studied the magnetic topology of active region 12158 on 2014 September 10 and compared it with the observations before and early in the flare that begins at 17:21 UT (SOL2014-09-10T17:45:00). Our results show that the sigmoidal structure and flare ribbons of this active region observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly can be well reproduced from a Grad–Rubin nonlinear force-free field extrapolation method. Various inverse-S- and inverse-J-shaped magnetic field lines, which surround a coronal flux rope, coincide with the sigmoid as observed in different extreme-ultraviolet wavelengths, including its multithreaded curved ends. Also, the observed distribution of surface currents in the magnetic polarity where it was not prescribed is well reproduced. This validates our numerical implementation and setup of the Grad–Rubin method. The modeled double inverse-J-shaped quasi-separatrix layer (QSL) footprints match the observed flare ribbons during the rising phase of the flare, including their hooked parts. The spiral-like shape of the latter may be related to a complex pre-eruptive flux rope with more than one turn of twist, as obtained in the model. These ribbon-associated flux-rope QSL footprints are consistent with the new standard flare model in 3D, with the presence of a hyperbolic flux tube located below an inverse-teardrop-shaped coronal QSL. This is a new step forward forecasting the locations of reconnection and ribbons in solar flares and the geometrical properties of eruptive flux ropes.
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DOI：
10.1088/2041-8205/782/1/l10
发表时间：
2014-01
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
Tibor Torok;J. Leake;Viacheslav S. Titov;V. Archontis;Zoran Miki'c;M. Linton;K. Dalmasse;Guillaume Aulanier;B. Kliem
通讯作者：
Tibor Torok;J. Leake;Viacheslav S. Titov;V. Archontis;Zoran Miki'c;M. Linton;K. Dalmasse;Guillaume Aulanier;B. Kliem
影响因子：
2.8
作者：
W. Pesnell;B. Thompson;P. Chamberlin
通讯作者：
W. Pesnell;B. Thompson;P. Chamberlin
DOI：
10.3847/0004-637x/817/1/43
发表时间：
2016-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
A. Savcheva;E. Pariat;S. McKillop;P. McCauley;E. Hanson;Y. Su;E. DeLuca
通讯作者：
A. Savcheva;E. Pariat;S. McKillop;P. McCauley;E. Hanson;Y. Su;E. DeLuca
影响因子：
6.5
作者：
Aulanier, G.;Janvier, M.;Schmieder, B.
通讯作者：
Schmieder, B.
DOI：
10.1086/175188
发表时间：
1995
期刊：
The Astrophysical Journal
影响因子：
--
作者：
T. Metcalf;L. Jiao;A. Mcclymont;R. Canfield;H. Uitenbroek
通讯作者：
T. Metcalf;L. Jiao;A. Mcclymont;R. Canfield;H. Uitenbroek