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Formation of current helicity and emerging magnetic flux in solar active regions
Zhang, HQ
2001-09-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号326期号:1页码:57-66
摘要This paper aims to study the properties of the current helicity in solar active regions. The current helicity provides different information relative to the magnetic helicity and has a simple relationship with the magnetic energy in the approximation of the force-free field. For example, we analyse the active region (NOAA 7321) which was a newly emerging delta active region in 1992 October. It provides good evidence for the development of the magnetic chirality in the solar active regions. From a series of photospheric-vector magnetograms and corresponding soft X-ray images, it is found that the newly emerging magnetic flux associates the current helicity from the subatmosphere in the active regions with the redistribution of the current helicity density in the upper atmosphere, i.e. it provides observational evidence that flux and helicity emerge together.
关键词Sun : Magnetic Fields
收录类别SCI
语种英语
WOS记录号WOS:000171019300008
引用统计
被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8569
专题太阳物理研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China
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Zhang, HQ. Formation of current helicity and emerging magnetic flux in solar active regions[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2001,326(1):57-66.
APA Zhang, HQ.(2001).Formation of current helicity and emerging magnetic flux in solar active regions.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,326(1),57-66.
MLA Zhang, HQ."Formation of current helicity and emerging magnetic flux in solar active regions".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 326.1(2001):57-66.
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