Statistical Studies on the Excess Peak Flux in Soft X-rays and EUV Bands from Solar Flares
文献类型：期刊论文
| 作者 | Zhang, D. H.; Cai, L.; Ercha, A.; Hao, Y. Q.; Xiao, Z. |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2012 |
| 卷号 | 280期号:1页码:183-196 |
| ISSN号 | 0038-0938 |
| 关键词 | EUV Flare irradiance SEM X-rays |
| 通讯作者 | Zhang, DH (reprint author), Peking Univ, Dept Geophys, Beijing 100871, Peoples R China. |
| 中文摘要 | Based on the solar X-ray data in the band of 0.1 -aEuro parts per thousand 0.8 nm observed by Geostationary Operational Environmental Satellites (GOES), the XUV and EUV data in the bands of 26 -aEuro parts per thousand 34 nm and 0.1 -aEuro parts per thousand 50 nm observed by the Solar EUV Monitor (SEM) onboard the Solar and Heliospheric Observatory (SOHO), a statistical analysis on the excess peak flux (the pre-flare flux is subtracted) in two SEM bands during M- and X-class flares from 1998 to 2007 is given. The average ratio of the excess peak flux to the pre-flare flux for the M-class flares is 5.5 %+/- 3.7 % and that for the X-class flares is 16 %+/- 11 %. The excess peak fluxes in two SEM bands are positively correlated with the X-ray flare class; with the increase in the X-ray flare class, the excess peak flux in two SEM bands increases. However, a large dispersion in the excess peak flux in the SEM bands and their ratio is found for the same X-ray flare class. The relationship between the excess peak fluxes of the two SEM bands also shows large dispersion. It is considered that the diversity we found in the flare spectral irradiance is caused by many variable factors related to the structure and evolution of solar flares. |
| 英文摘要 | Based on the solar X-ray data in the band of 0.1 -aEuro parts per thousand 0.8 nm observed by Geostationary Operational Environmental Satellites (GOES), the XUV and EUV data in the bands of 26 -aEuro parts per thousand 34 nm and 0.1 -aEuro parts per thousand 50 nm observed by the Solar EUV Monitor (SEM) onboard the Solar and Heliospheric Observatory (SOHO), a statistical analysis on the excess peak flux (the pre-flare flux is subtracted) in two SEM bands during M- and X-class flares from 1998 to 2007 is given. The average ratio of the excess peak flux to the pre-flare flux for the M-class flares is 5.5 %+/- 3.7 % and that for the X-class flares is 16 %+/- 11 %. The excess peak fluxes in two SEM bands are positively correlated with the X-ray flare class; with the increase in the X-ray flare class, the excess peak flux in two SEM bands increases. However, a large dispersion in the excess peak flux in the SEM bands and their ratio is found for the same X-ray flare class. The relationship between the excess peak fluxes of the two SEM bands also shows large dispersion. It is considered that the diversity we found in the flare spectral irradiance is caused by many variable factors related to the structure and evolution of solar flares. |
| 学科主题 | 空间物理 |
| 资助信息 | National Natural Science Foundation of China [41174134, 40904036]; National Important basic Research Project of China [2011CB811405]; State Key Laboratory of Space Weather |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3093]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhang, D. H.,Cai, L.,Ercha, A.,et al. Statistical Studies on the Excess Peak Flux in Soft X-rays and EUV Bands from Solar Flares[J]. SOLAR PHYSICS,2012,280(1):183-196. |
| APA | Zhang, D. H.,Cai, L.,Ercha, A.,Hao, Y. Q.,&Xiao, Z..(2012).Statistical Studies on the Excess Peak Flux in Soft X-rays and EUV Bands from Solar Flares.SOLAR PHYSICS,280(1),183-196. |
| MLA | Zhang, D. H.,et al."Statistical Studies on the Excess Peak Flux in Soft X-rays and EUV Bands from Solar Flares".SOLAR PHYSICS 280.1(2012):183-196. |
入库方式： OAI收割
来源：国家空间科学中心
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