Relationship between rotating sunspots and flares
文献类型：期刊论文
| 作者 | Zhang, Yin ; Liu, Jihong; Zhang, Hongqi
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2008 |
| 卷号 | 247期号:1页码:39-52 |
| 关键词 | Sun : sunspot Sun : magnetic field Sun : activity |
| 英文摘要 | Active Region (AR) NOAA 10486 was a super AR in the declining phase of solar cycle 23. Dominated by the rapidly rotating positive polarity of an extensive delta sunspot, it produced several powerful flare-CMEs. We study the evolution and properties of the rotational motion of the major poles of positive polarities and estimate the accumulated helicity injected by them. We also present two homologous flares that occurred in the immediate periphery of the rotating sunspots. The main results are as follows: i) anticlockwise rotational motions are identified in the main poles of positive polarities in the AR; the fastest of them is about 220 degrees for six days. ii) The helicity injection inferred from such rotational motion during the interval from October 25 to 30 is about -3.0x10(43) Mx(2), which is comparable that calculated by the local correlation tracking (LCT) method (-5.2x10(43)Mx(2)) in the whole AR. It is suggested that both methods reveal the essential topological properties of the AR, even if the former includes only the major poles and the fine features of the magnetic field are neglected. iii) It is found that there is a good spatial and temporal correspondence between the onset of two homologous CME-associated flares and the rotational motion of sunspots. This suggests that the rotational motions of sunspots not only relate to the transport of magnetic energy and complexity from the low atmosphere to the corona but may also play a key role in the onset of the homologous flares. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000252476300004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7378]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yin,Liu, Jihong,Zhang, Hongqi. Relationship between rotating sunspots and flares[J]. SOLAR PHYSICS,2008,247(1):39-52. |
| APA | Zhang, Yin,Liu, Jihong,&Zhang, Hongqi.(2008).Relationship between rotating sunspots and flares.SOLAR PHYSICS,247(1),39-52. |
| MLA | Zhang, Yin,et al."Relationship between rotating sunspots and flares".SOLAR PHYSICS 247.1(2008):39-52. |
入库方式： OAI收割
来源：国家天文台
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