The X10 flare on 29 October 2003: Was it triggered by magnetic reconnection between counter-helical fluxes?
文献类型：期刊论文
| 作者 | Liu, Yu; Kurokawa, Hiroki; Liu, Chang; Brooks, David H.; Dun, Jingping; Ishii, Takako T.; Zhang, Hongqi
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2007-02-01 |
| 卷号 | 240期号:2页码:253-262 |
| 英文摘要 | Vector magnetograms taken at Huairou Solar Observing Station (HSOS) and Mees Solar Observatory (MSO) reveal that the super active region (AR) NOAA 10486 was a complex region containing current helicity flux of opposite signs. The main positive sunspots were dominated by negative helicity fields, while positive helicity patches persisted both inside and around the main positive sunspots. Based on a comparison of two days of deduced current helicity density, pronounced changes associated with the occurrence of an X10 flare that peaked at 20:49 UT on 29 October 2003 were noticed. The average current helicity density (negative) of the main sunspots decreased significantly by about 50%. Accordingly, the helicity densities of counter-helical patches (positive) were also found to decay by the same proportion or more. In addition, two hard X-ray (HXR) "footpoints" were observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) during the flare in the 50-100 keV energy range. The cores of these two HXR footpoints were adjacent to the positions of two patches with positive current helicity that disappeared after the flare. This strongly suggested that the X10 flare on 29 October 2003 resulted from reconnection between magnetic flux tubes having opposite current helicity. Finally, the global decrease of current helicity in AR 10486 by similar to 50% can be understood as the helicity launched away by the halo coronal mass ejection (CME) associated with the X10 flare. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000245363500005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7189]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Univ Hawaii, Astron Inst, Honolulu, HI 96822 USA 2.Kyoto Univ, Kwasan & Hida Observ, Yamashina Ku, Kyoto 6078471, Japan 3.New Jersey Inst Technol, Ctr Solarterr Res, Newark, NJ 07102 USA 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yu,Kurokawa, Hiroki,Liu, Chang,et al. The X10 flare on 29 October 2003: Was it triggered by magnetic reconnection between counter-helical fluxes?[J]. SOLAR PHYSICS,2007,240(2):253-262. |
| APA | Liu, Yu.,Kurokawa, Hiroki.,Liu, Chang.,Brooks, David H..,Dun, Jingping.,...&Zhang, Hongqi.(2007).The X10 flare on 29 October 2003: Was it triggered by magnetic reconnection between counter-helical fluxes?.SOLAR PHYSICS,240(2),253-262. |
| MLA | Liu, Yu,et al."The X10 flare on 29 October 2003: Was it triggered by magnetic reconnection between counter-helical fluxes?".SOLAR PHYSICS 240.2(2007):253-262. |
入库方式： OAI收割
来源：国家天文台
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