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Some basic questions on helicity inferred from vector magnetograms
Xu HaiQing; Gao Yu; Zhang HongQi
2009-11-01
Source PublicationSCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY
Volume52Issue:11Pages:1749-1753
AbstractThis paper summarizes current helicity measurements in the solar active regions (ARs). There is a basic agreement with the "hemispheric sign rule (HSR)" of the current helicity among different vector magnetographs through two solar cycles, but there is a large dispersion of the fraction of ARs following the HSR. In our sample, there are 50%-78% ARs in solar cycle 22 and 44%-79% ARs in cycle 23 following the HSR. A variation is also found in the fraction of the ARs following the HSR between different instruments even when the same ARs are selected. The difference also exists for the same instrument when the selected ARs are different. There are some differences in the variation of HSR with solar cycle for the individual helicity parameter inferred from different instruments. Factors which influence the correlation of different data sets are analyzed.
KeywordPhotosphere Magnetic Field Helicity Solar Dynamo
DOI10.1007/s11433-009-0246-3
Indexed BySCI ; ISTP
Language英语
WOS IDWOS:000271718600019
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8132
Collection太阳物理研究部
AffiliationChinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Xu HaiQing,Gao Yu,Zhang HongQi. Some basic questions on helicity inferred from vector magnetograms[J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,2009,52(11):1749-1753.
APA Xu HaiQing,Gao Yu,&Zhang HongQi.(2009).Some basic questions on helicity inferred from vector magnetograms.SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,52(11),1749-1753.
MLA Xu HaiQing,et al."Some basic questions on helicity inferred from vector magnetograms".SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY 52.11(2009):1749-1753.
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