Investigation of pre-flare dynamics using the weighted horizontal magnetic gradient method: From small to major flare classes

doi:10.1051/swsc/2019002

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	Investigation of pre-flare dynamics using the weighted horizontal magnetic gradient method: From small to major flare classes
	Korsos, Marianna B.1,2,3; Yang, Shuhong 4,5; Erdelyi, Robertus 1,3
刊名	JOURNAL OF SPACE WEATHER AND SPACE CLIMATE
	2019-02-01
卷号	9 页码:12
关键词	Sun flares precursors
ISSN号	2115-7251
DOI	10.1051/swsc/2019002
英文摘要	There is a wide range of eruptions in the solar atmosphere which contribute to space weather, including the major explosions of radiation known as flares. To examine pre-event behavior in delta-spot regions, we use here a method based on the weighted horizontal gradient of magnetic field (WG(M)), defined between opposite polarity umbrae at the polarity inversion line of active regions (ARs) as measured using from the Debrecen Heliophysical Observatory catalogues. In this work, we extend the previous analysis of high-energy flares to include both medium (M) and low-energy (C and B) flares. First, we found a logarithmic relationship between the log value of highest flare class intensity (from B- to X-class) in a delta-spot AR and the maximum value of WG(M) of the 127 ARs investigated. We confirm a trend in the convergence-divergence phase of the barycenters of opposite polarities in the vicinity of the polarity inversion line. The extended sample, (i) affirms the linear connection between the durations of the convergence-divergence phases of barycenters of opposite polarities in delta-spot regions up to flare occurrence and (ii) provides a geometric constraint for the location of flare emission around the polarity inversion line. The method provides a tool to possibly estimate the likelihood of a subsequent flare of the same or larger energy.
资助项目	University of Sheffield ; Hungarian Academy of Sciences ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories[KLSA201610] ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Presidents International Fellowship Initiative[2016VMA045] ; Science and Technology Facilities Council (STFC), UK[ST/M000826/1] ; National Natural Science Foundations of China[11673035] ; National Natural Science Foundations of China[11790304]
WOS关键词	SOLAR-FLARES
WOS研究方向	Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000457358100001
资助机构	University of Sheffield ; University of Sheffield ; Hungarian Academy of Sciences ; Hungarian Academy of Sciences ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Presidents International Fellowship Initiative ; CAS Presidents International Fellowship Initiative ; Science and Technology Facilities Council (STFC), UK ; Science and Technology Facilities Council (STFC), UK ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; University of Sheffield ; University of Sheffield ; Hungarian Academy of Sciences ; Hungarian Academy of Sciences ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Presidents International Fellowship Initiative ; CAS Presidents International Fellowship Initiative ; Science and Technology Facilities Council (STFC), UK ; Science and Technology Facilities Council (STFC), UK ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; University of Sheffield ; University of Sheffield ; Hungarian Academy of Sciences ; Hungarian Academy of Sciences ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Presidents International Fellowship Initiative ; CAS Presidents International Fellowship Initiative ; Science and Technology Facilities Council (STFC), UK ; Science and Technology Facilities Council (STFC), UK ; National Natural Science Foundations of China ; National Natural Science Foundations of China ; University of Sheffield ; University of Sheffield ; Hungarian Academy of Sciences ; Hungarian Academy of Sciences ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Key Laboratory of Solar Activity, National Astronomical Observatories Commission for Collaborating Research Program ; CAS Presidents International Fellowship Initiative ; CAS Presidents International Fellowship Initiative ; Science and Technology Facilities Council (STFC), UK ; Science and Technology Facilities Council (STFC), UK ; National Natural Science Foundations of China ; National Natural Science Foundations of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/24966]
专题	中国科学院国家天文台
通讯作者	Korsos, Marianna B.
作者单位	1.Univ Sheffield, Sch Math & Stat, Solar Phys & Space Plasma Res Ctr SP2RC, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England 2.Hungarian Acad Sci, Res Ctr Astron & Earth Sci, DHO, POB 30, H-4010 Debrecen, Hungary 3.Eotvos Lorand Univ, Dept Astron, Pazmany P Setany 1-A, H-1117 Budapest, Hungary 4.Chinese Acad Sci, CAS Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 5.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Korsos, Marianna B.,Yang, Shuhong,Erdelyi, Robertus. Investigation of pre-flare dynamics using the weighted horizontal magnetic gradient method: From small to major flare classes[J]. JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,2019,9:12.
APA	Korsos, Marianna B.,Yang, Shuhong,&Erdelyi, Robertus.(2019).Investigation of pre-flare dynamics using the weighted horizontal magnetic gradient method: From small to major flare classes.JOURNAL OF SPACE WEATHER AND SPACE CLIMATE,9,12.
MLA	Korsos, Marianna B.,et al."Investigation of pre-flare dynamics using the weighted horizontal magnetic gradient method: From small to major flare classes".JOURNAL OF SPACE WEATHER AND SPACE CLIMATE 9(2019):12.