Morphological evidence for nanoflares heating warm loops in the solar corona

doi:10.1051/0004-6361/202346944

	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
刊名	ASTRONOMY & ASTROPHYSICS
	2023-10-30
卷号	679
关键词	Sun: corona Sun: flares Sun: magnetic fields
ISSN号	0004-6361
DOI	10.1051/0004-6361/202346944
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
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关键词	HIGH-TEMPERATURE EMISSION ; MAGNETIC-FIELDS ; ALFVENIC WAVES ; ENERGY-RELEASE ; DYNAMICS ; SDO/AIA ; PLASMA ; STRANDS ; IMAGES ; POWER
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
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26519]
专题	云南天文台_太阳物理研究组
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
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).