ASYMMETRY OF MAGNETIC HELICITY FLUX IN EMERGING BIPOLAR ACTIVE REGIONS
文献类型：期刊论文
| 作者 | Yang D(杨丹)1,2 ; Jiang YC(姜云春)1; Yang JY(杨家艳)1; Bi Y(毕以)1; Yang B(杨波)1,2
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| 刊名 | JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY
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| 出版日期 | 2014-06-30 |
| 卷号 | 47期号:3页码:105-113 |
| ISSN号 | 1225-4614 |
| 关键词 | Sun: interior Sun: magnetic fields Sun: photosphere |
| 通讯作者 | Yang, D (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 产权排序 | 第一完成单位 |
| 英文摘要 | We apply differential affine velocity estimator (DAVE) to the Solar Dynamics Observatory (SDO)/Helioseismic and Magnetic Imager (HMI) 12-min line-of-sight magnetograms, and separately calculate the injected magnetic helicity for the leading and the following polarities of nine emerging bipolar active regions (ARs). Comparing magnetic helicity flux of the leading polarity with the following polarity, we find that six ARs studied in this paper have the following polarity that injected more magnetic helicity flux than that of the leading polarity. We also measure the mean area of each polarity in all the nine ARs, and find that the compact polarity tend to possess more magnetic helicity flux than the fragmented one. Our results confirm the previous studies on asymmetry of magnetic helicity that emerging bipolar ARs have a polarity preference in injecting magnetic helicity. Based on the changes of unsigned magnetic flux, we divide the emergence process into two evolutionary stages: (1) an increasing stage before the peak flux and (2) a constant or decreasing stage after the peak flux. Obvious changes on magnetic helicity flux can be seen during transition from one stage to another. Seven ARs have one or both polarity that changed the sign of magnetic helicity flux. Additionally, the prevailing polarity of the two ARs, which injects more magnetic helicity, changes form the following polarity to the leading one. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | INDUCTION EQUATION ; HORIZONTAL MOTION ; CONVECTION ZONE ; SOLAR CORONA ; NOAA 10930 ; FIELDS ; ORIGIN ; EVOLUTION ; INJECTION ; TRANSPORT |
| 收录类别 | SCI |
| 原文出处 | http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=CMHHBA_2014_v47n3_105 |
| 语种 | 英语 |
| WOS记录号 | WOS:000339089900003 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6249]  |
| 专题 | 云南天文台_太阳物理研究组 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Yang D,Jiang YC,Yang JY,et al. ASYMMETRY OF MAGNETIC HELICITY FLUX IN EMERGING BIPOLAR ACTIVE REGIONS[J]. JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY,2014,47(3):105-113. |
| APA | Yang D,Jiang YC,Yang JY,Bi Y,&Yang B.(2014).ASYMMETRY OF MAGNETIC HELICITY FLUX IN EMERGING BIPOLAR ACTIVE REGIONS.JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY,47(3),105-113. |
| MLA | Yang D,et al."ASYMMETRY OF MAGNETIC HELICITY FLUX IN EMERGING BIPOLAR ACTIVE REGIONS".JOURNAL OF THE KOREAN ASTRONOMICAL SOCIETY 47.3(2014):105-113. |
入库方式： OAI收割
来源：云南天文台
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