Ultra-high-resolution observations of persistent null-point reconnection in the solar corona.
Ultra-high-resolution observations of persistent null-point reconnection in the solar corona.
复制标题
日冕中持续零点重联的超高分辨率观测。
DOI：
10.1038/s41467-023-37888-w
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发表时间：
2023-04-13
影响因子：
16.6
通讯作者：
Parenti, S.
中科院分区：
文献类型：
--
作者：
Cheng, X.;Priest, E. R.;Li, H. T.;Chen, J.;Aulanier, G.;Chitta, L. P.;Wang, Y. L.;Peter, H.;Zhu, X. S.;Xing, C.;Ding, M. D.;Solanki, S. K.;Berghmans, D.;Teriaca, L.;Cuadrado, R. Aznar;Zhukov, A. N.;Guo, Y.;Long, D.;Harra, L.;Smith, P. J.;Rodriguez, L.;Verbeeck, C.;Barczynski, K.;Parenti, S.
磁场重联是太阳爆发的关键机制，也是将低日冕加热到数百万度的主要可能性。在这里，我们提出了超高分辨率的极紫外线观测的持续零点重联在日冕中的尺度约390公里，超过一个小时的极端紫外线成像仪上的太阳轨道器航天器的观测。观测结果表明，在太阳黑子附近的负极性占主导地位的区域内，在一个次要的正极性上方形成了一个零点配置。持续的零点重联的温和阶段证明了持续的点状高温等离子体（约10 MK）附近的零点和恒定的流出液滴不仅沿着外脊，但也沿着风扇表面。这些斑点出现的频率比以前观察到的更高，平均速度约为80 km s-1，寿命约为40 s。零点重联也发生爆炸性的，但只有4分钟，它与一个迷你灯丝爆发耦合产生螺旋喷流。这些结果表明，磁重联，在以前未解决的规模，继续在一个温和的和/或爆炸性的方式持续不断地转移质量和能量的覆盖日冕。磁场重联是空间和实验室等离子体中一种基本的能量释放机制。在这里，作者展示了太阳日冕中约390公里尺度的持续磁零点重联。
Magnetic reconnection is a key mechanism involved in solar eruptions and is also a prime possibility to heat the low corona to millions of degrees. Here, we present ultra-high-resolution extreme ultraviolet observations of persistent null-point reconnection in the corona at a scale of about 390 km over one hour observations of the Extreme-Ultraviolet Imager on board Solar Orbiter spacecraft. The observations show formation of a null-point configuration above a minor positive polarity embedded within a region of dominant negative polarity near a sunspot. The gentle phase of the persistent null-point reconnection is evidenced by sustained point-like high-temperature plasma (about 10 MK) near the null-point and constant outflow blobs not only along the outer spine but also along the fan surface. The blobs appear at a higher frequency than previously observed with an average velocity of about 80 km s−1 and life-times of about 40 s. The null-point reconnection also occurs explosively but only for 4 minutes, its coupling with a mini-filament eruption generates a spiral jet. These results suggest that magnetic reconnection, at previously unresolved scales, proceeds continually in a gentle and/or explosive way to persistently transfer mass and energy to the overlying corona. Magnetic reconnection is a fundamental energy release mechanism in space and laboratory plasmas. Here, the authors show persistent magnetic null-point reconnection in the solar corona at a scale of about 390 km.
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影响因子：
4.9
作者：
Lazarian, A;Vishniac, ET
通讯作者：
Vishniac, ET
影响因子：
4.9
作者：
Cheung, Mark C. M.;Boerner, P.;Malanushenko, A.
通讯作者：
Malanushenko, A.
影响因子：
7.9
作者：
Cheng, X.;Zhang, J.;Ding, M. D.
通讯作者：
Ding, M. D.
影响因子：
6.5
作者：
Chitta, L. P.;Solanki, S. K.;Verbeeck, C.
通讯作者：
Verbeeck, C.
影响因子：
6.5
作者：
Chitta, L. P.;Peter, H.;Huang, Y. -M.
通讯作者：
Huang, Y. -M.