Global analysis of active longitudes of solar X-ray flares
文献类型：期刊论文
| 作者 | Zhang, L.1,2,3 ; Mursula, K.1; Usoskin, I.4; Wang, H.2,3
|
| 刊名 | JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
 |
| 出版日期 | 2011-02-01 |
| 卷号 | 73期号:2-3页码:258-263 |
| 关键词 | Solar X-rays Flares Active longitudes |
| 英文摘要 | There is increasing evidence that various manifestations of solar activity are non-axisymmetric and mainly occur in two preferred longitude ranges, so called active longitudes. We have earlier analyzed the longitudinal occurrence of solar X-ray flares observed by GOES satellites using a specially developed dynamic, differentially rotating coordinate system. In this frame, the longitude distribution shows two persistent preferred longitudes separated by about 180 degrees whose strength alternates in time according to the so called flip-flop phenomenon. Here we make the first global statistical analysis to find the best fitting values for parameters describing the differential rotation of active longitudes of X-ray flares. We find that the new analysis greatly improves the earlier values for the rotation parameters, making them consistent between the three different classes of X-ray flares. The improved parameters also yield a systematically higher level of non-axisymmetry for the longitudinal distribution, thus increasing the statistical significance of the existence of active longitudes. Accordingly, a significant amount of X-ray flares of different classes are produced by the same two active longitudes. We also find a significant difference between the rotation rates in the two solar hemispheres, with active longitudes rotating faster than the Carrington rate in the northern hemisphere and slower than the Carrington rate in the southern hemisphere. (C) 2009 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000287055300011 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8014]  |
| 专题 | 国家天文台_应用天文研究部 |
| 作者单位 | 1.Univ Oulu, Dept Phys, FIN-90570 Oulu, Finland 2.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 3.Chinese Acad Sci, Key Lab Solar Act, Beijing, Peoples R China 4.Univ Oulu, Sodankyla Geophys Observ, FIN-90570 Oulu, Finland |
| 推荐引用方式 GB/T 7714 | Zhang, L.,Mursula, K.,Usoskin, I.,et al. Global analysis of active longitudes of solar X-ray flares[J]. JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,2011,73(2-3):258-263. |
| APA | Zhang, L.,Mursula, K.,Usoskin, I.,&Wang, H..(2011).Global analysis of active longitudes of solar X-ray flares.JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS,73(2-3),258-263. |
| MLA | Zhang, L.,et al."Global analysis of active longitudes of solar X-ray flares".JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS 73.2-3(2011):258-263. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。