NAOC Open IR  > 太阳物理研究部
VECTOR MAGNETIC FIELDS AND CURRENT HELICITIES IN CORONAL HOLES AND QUIET REGIONS
Yang, Shuhong1; Zhang, Jun1; Li, Ting1; Ding, Mingde2,3
2011
Source PublicationASTROPHYSICAL JOURNAL
Volume726Issue:1
AbstractIn 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.
KeywordSun: Activity Sun: Fundamental Parameters Sun: Photosphere
DOI10.1088/0004-637X/726/1/49
Indexed BySCI
Language英语
WOS IDWOS:000285411300049
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8005
Collection太阳物理研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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