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VECTOR MAGNETIC FIELDS AND CURRENT HELICITIES IN CORONAL HOLES AND QUIET REGIONS
Yang, Shuhong1; Zhang, Jun1; Li, Ting1; Ding, Mingde2,3
2011
发表期刊ASTROPHYSICAL JOURNAL
卷号726期号:1
摘要In the solar photosphere, many properties of coronal holes (CHs) are not known, especially vector magnetic fields. Using observations from Hinode, we investigate vector magnetic fields, current densities, and current helicities in two CHs, and compare them with two normal quiet regions (QRs) for the first time. We find that the areas where large current helicities are located are mainly co-spatial with strong vertical and horizontal field elements both in shape and in location. In the CHs, horizontal magnetic fields, inclination angles, current densities, and current helicities are larger than those in the QRs. The mean vertical current density and current helicity in the CHs and QRs, averaged over all the observed areas including the CHs and QRs, are approximately 0.008 A m(-2) and 0.005 G(2) m(-1), respectively. The mean current density in magnetic flux concentrations where the vertical fields are stronger than 100 G is as large as 0.012 +/- 0.001 A m(-2), consistent with that in the flare productive active regions. Our results imply that the magnetic fields, especially the strong fields, both in the CHs and in the QRs are nonpotential.
关键词Sun: Activity Sun: Fundamental Parameters Sun: Photosphere
DOI10.1088/0004-637X/726/1/49
收录类别SCI
语种英语
WOS记录号WOS:000285411300049
引用统计
被引频次:5[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/114a11/8005
专题太阳物理研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
2.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
3.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Peoples R China
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Yang, Shuhong,Zhang, Jun,Li, Ting,et al. VECTOR MAGNETIC FIELDS AND CURRENT HELICITIES IN CORONAL HOLES AND QUIET REGIONS[J]. ASTROPHYSICAL JOURNAL,2011,726(1).
APA Yang, Shuhong,Zhang, Jun,Li, Ting,&Ding, Mingde.(2011).VECTOR MAGNETIC FIELDS AND CURRENT HELICITIES IN CORONAL HOLES AND QUIET REGIONS.ASTROPHYSICAL JOURNAL,726(1).
MLA Yang, Shuhong,et al."VECTOR MAGNETIC FIELDS AND CURRENT HELICITIES IN CORONAL HOLES AND QUIET REGIONS".ASTROPHYSICAL JOURNAL 726.1(2011).
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