Morphological evidence for nanoflares heating warm loops in the solar corona

doi:10.1051/0004-6361/202346944

YNAO OpenIR > 抚仙湖太阳观测和研究基地

	Morphological evidence for nanoflares heating warm loops in the solar corona
	Bi Y(毕以)1,2 ; Yang JY(杨家艳)1 ; Tan Y(覃瑛)1,2 ; Qiang, Zheng-Ping 3; Hong JC(洪俊超)1 ; Yang B(杨波)1 ; Xu Z(徐喆)1 ; Liu H(刘辉)1,2 ; Ji KF(季凯帆)1
发表期刊	ASTRONOMY & ASTROPHYSICS
	2023-10-30
卷号	679
DOI	10.1051/0004-6361/202346944
产权排序	第1完成单位
收录类别	SCI ; EI
关键词	Sun: corona Sun: flares Sun: magnetic fields
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.
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
项目资助者	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
语种	英语
学科领域	天文学
文章类型	Article
出版者	EDP SCIENCES S A
出版地	17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN	0004-6361
URL	查看原文
WOS记录号	WOS:001096229100008
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	HIGH-TEMPERATURE EMISSION ; MAGNETIC-FIELDS ; ALFVENIC WAVES ; ENERGY-RELEASE ; DYNAMICS ; SDO/AIA ; PLASMA ; STRANDS ; IMAGES ; POWER
EI入藏号	20234615061940
EI主题词	Magnetic fields
EI分类号	701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.ynao.ac.cn/handle/114a53/26519
专题	抚仙湖太阳观测和研究基地太阳物理研究组天文技术实验室
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, PR China; 2.Yunnan Key Laboratory of Solar Physics and Space Science, 396 Yangfangwang, Guandu District, Kunming 650216, PR China; 3.College of Big Data and Intelligent Engineering, Southwest Forestry University, Kunming 650224, PR China
第一作者单位	中国科学院云南天文台
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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