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Morphological evidence for nanoflares heating warm loops in the solar corona

文献类型：期刊论文

作者Bi Y(毕以)2,3; Yang JY(杨家艳)3; Tan Y(覃瑛)2,3; Qiang, Zheng-Ping1; Hong JC(洪俊超)3; Yang B(杨波)3; Xu Z(徐喆)3; Liu H(刘辉)2,3; Ji KF(季凯帆)3
刊名ASTRONOMY & ASTROPHYSICS
出版日期2023-10-30
卷号679
ISSN号0004-6361
关键词Sun: corona Sun: flares Sun: magnetic fields
DOI10.1051/0004-6361/202346944
产权排序第1完成单位
文献子类Article
英文摘要Context. Nanoflares are impulsive energy releases that occur due to magnetic reconnection in the braided coronal magnetic field, which is a potential mechanism for heating the corona. However, there are still sporadic observations of the interchange of braiding structure segments and footpoints inside coronal loops, which is predicted to be the morphological evolution of the reconnecting magnetic bundles in the nanoflare picture. Aims. This work aims to detect the evolutions of the pairs of braiding strands within the apparent single coronal loops observed in Atmospheric Imaging Assembly (AIA) images. Methods. The loop strands were detected on two kinds of upsampled AIA 193 angstrom images, which were obtained by upscaling the point spread function matched AIA images via bicubic interpolation and were generated using a super-resolution convolutional neural network. The architecture of the network is designed to map the AIA images to unprecedentedly high spatial resolution coronal images taken by the High-resolution Coronal Imager (Hi-C) during its brief flight. Results. At times, pairs of separate strands that appear braided together later evolved into pairs of almost parallel strands with completely exchanged parts. These evolutions offer morphological evidence that magnetic reconnections between the braiding strands have taken place, which is further supported by the appearance of transient hot emissions containing significant high-temperature components (T > 5 MK) at the footpoints of the braiding structures. Conlusions. The brief appearances of the two rearranging strands support the idea that magnetic reconnections have occurred within what appears to be a single AIA loop.
学科主题天文学
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词HIGH-TEMPERATURE EMISSION ; MAGNETIC-FIELDS ; ALFVENIC WAVES ; ENERGY-RELEASE ; DYNAMICS ; SDO/AIA ; PLASMA ; STRANDS ; IMAGES ; POWER
资助项目The authors are grateful to the anonymous referee for detailed comments and useful suggestions that improved this manuscript. We acknowledge the High resolution Coronal Imager instrument team for making the flight data publicly available. MSFC/NASA led the; MSFC/NASA; Lockheed Martin's Solar Astrophysical Laboratory in Palo Alto; Lebedev Physical Institute of the Russian Academy of Sciences in Moscow[2019YFA0405000]; National Key Research and Development Program of China[12273106]; National Key Research and Development Program of China[12073077]; National Key Research and Development Program of China[12163004]; National Key Research and Development Program of China[U2031140]; National Key Research and Development Program of China[12073072]; National Key Research and Development Program of China[11933009]; National Key Research and Development Program of China[12273108]; National Key Research and Development Program of China[12203097]; National Key Research and Development Program of China[12003068]; National Key Research and Development Program of China[11873088]; National Key Research and Development Program of China[12173084]; National Key Research and Development Program of China[11973088]; Natural Science Foundation of China; CAS Light of West China Program[XDB 41000000]; Strategic Priority Research Program of Chinese Academy of Sciences
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:001096229100008
资助机构The authors are grateful to the anonymous referee for detailed comments and useful suggestions that improved this manuscript. We acknowledge the High resolution Coronal Imager instrument team for making the flight data publicly available. MSFC/NASA led the ; MSFC/NASA ; Lockheed Martin's Solar Astrophysical Laboratory in Palo Alto ; Lebedev Physical Institute of the Russian Academy of Sciences in Moscow[2019YFA0405000] ; National Key Research and Development Program of China[12273106, 12073077, 12163004, U2031140, 12073072, 11933009, 12273108, 12203097, 12003068, 11873088, 12173084, 11973088] ; Natural Science Foundation of China ; CAS Light of West China Program[XDB 41000000] ; Strategic Priority Research Program of Chinese Academy of Sciences
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/26519]  
专题云南天文台_抚仙湖太阳观测站
云南天文台_太阳物理研究组
天文技术实验室
作者单位1.College of Big Data and Intelligent Engineering, Southwest Forestry University, Kunming 650224, PR China
2.Yunnan Key Laboratory of Solar Physics and Space Science, 396 Yangfangwang, Guandu District, Kunming 650216, PR China;
3.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, PR China;
推荐引用方式
GB/T 7714		 Bi Y,Yang JY,Tan Y,et al. Morphological evidence for nanoflares heating warm loops in the solar corona[J]. ASTRONOMY & ASTROPHYSICS,2023,679.
APA 毕以.,杨家艳.,覃瑛.,Qiang, Zheng-Ping.,洪俊超.,...&季凯帆.(2023).Morphological evidence for nanoflares heating warm loops in the solar corona.ASTRONOMY & ASTROPHYSICS,679.
MLA 毕以,et al."Morphological evidence for nanoflares heating warm loops in the solar corona".ASTRONOMY & ASTROPHYSICS 679(2023).

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来源：云南天文台

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