Quasi-Separatrix Layers and Three-Dimensional Magnetic Reconnection: Theory and Observations of Solar Flares (Invited Review)

IF 2.4 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2025-10-07 DOI:10.1007/s11207-025-02549-2

Jaroslav Dudík, Guillaume Aulanier, Juraj Lörinčík, Alena Zemanová

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Abstract

Over the past three decades, models of solar flares and eruptions based on quasi-separatrix layers (QSLs) have made several important, observationally verified predictions regarding how the magnetic reconnection happens in 3D. Thus, they have become the best available theory of how and where solar flares and eruptions happen. We review the properties of QSLs, the close correspondence between QSL traces in the lower atmosphere and flare ribbons, together with their association to electric current enhancements, both modelled and observed ones. Furthermore, we review the slipping and slip-running nature of the magnetic reconnection in QSLs, and the associated apparent footpoint motions of the reconnecting structures, both modelled and observed. In addition, the purely 3D reconnection geometries involving the erupting magnetic flux rope are reviewed as well, along with the observational evidence for these processes. Finally, we discuss the indications that dynamics within the QSLs could play a role in heating the solar corona.

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准分离矩阵层和三维磁重联：太阳耀斑的理论与观测（特邀评论）

在过去的三十年里，基于准分离矩阵层（QSLs）的太阳耀斑和喷发模型已经做出了一些重要的、经过观测验证的预测，这些预测是关于磁重联如何在三维中发生的。因此，它们已经成为关于太阳耀斑和喷发如何以及在何处发生的最佳理论。我们回顾了QSL的性质，低层大气中QSL痕迹与耀斑带之间的密切对应关系，以及它们与电流增强的关系，包括模型和观测。此外，我们回顾了qsl中磁重联的滑动和滑动性质，以及相关的重联结构的明显脚点运动，包括建模和观察。此外，还回顾了涉及喷发磁通绳的纯三维重联几何形状，以及这些过程的观测证据。最后，我们讨论了qsl内部的动力学可能在加热日冕中起作用的迹象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.