NAOC Open IR
Microwave diagnostics of magnetic field strengths in solar flaring loops
Zhu Rui1; Tan BaoLin2,3; Su YingNa4,5; Tian Hui1,2; Xu Yu6; Chen XingYao2; Song YongLiang2; Tan GuangYu1
2020-08-26
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Pages10
AbstractWe have performed microwave diagnostics of the magnetic field strengths in solar flaring loops based on the theory of gyrosynchrotron emission. From Nobeyama Radioheliograph observations of three flare events at 17 and 34 GHz, we obtained the degree of circular polarization and the spectral index of microwave flux density, which were then used to map the magnetic field strengths in post-flare loops. Our results show that the magnetic field strength typically decreases from similar to 800 G near the loop footpoints to similar to 100 G at a height of 10-25 Mm. Comparison of our results with magnetic field modeling using a flux rope insertion method is also discussed. Our study demonstrates the potential of microwave imaging observations, even at only two frequencies, in diagnosing the coronal magnetic field of flaring regions.
Keywordsolar magnetic field solar flare microwave observation gyrosynchrotron emission
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1007/s11431-020-1620-7
WOS KeywordCORONAL MAGNETOGRAPHY ; NONTHERMAL ELECTRONS ; ACTIVE-REGION ; MODEL ; OSCILLATIONS
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDA17040507] ; National Natural Science Foundation of China[11790300] ; National Natural Science Foundation of China[11790301] ; National Natural Science Foundation of China[11790302] ; National Natural Science Foundation of China[11790304] ; National Natural Science Foundation of China[11825301] ; National Natural Science Foundation of China[11973057] ; National Natural Science Foundation of China[11803002] ; National Natural Science Foundation of China[11473071]
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000567253800002
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/81250
Collection中国科学院国家天文台
Corresponding AuthorTian Hui
Affiliation1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China
5.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
6.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
Recommended Citation
GB/T 7714
Zhu Rui,Tan BaoLin,Su YingNa,et al. Microwave diagnostics of magnetic field strengths in solar flaring loops[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020:10.
APA Zhu Rui.,Tan BaoLin.,Su YingNa.,Tian Hui.,Xu Yu.,...&Tan GuangYu.(2020).Microwave diagnostics of magnetic field strengths in solar flaring loops.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,10.
MLA Zhu Rui,et al."Microwave diagnostics of magnetic field strengths in solar flaring loops".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2020):10.
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