CHARACTERISTICS OF THE PHOTOSPHERIC MAGNETIC FIELD ASSOCIATED WITH SOLAR FLARE INITIATION
文献类型：期刊论文
| 作者 | Yang, Ya-Hui1; Chen, P. F.2; Hsieh, Min-Shiu3; Wu, S. T.4; He, Han5 ; Tsai, Tsung-Che6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-05-01 |
| 卷号 | 786期号:1 |
| 关键词 | Sun : flares Sun : magnetic fields Sun : X-rays gamma rays |
| 英文摘要 | The physical environment governing the solar flare initiation is not fully understood, although there are significant efforts to address the relationship between magnetic non-potential parameters and early flare signatures. In this study, we attempt to characterize the flare initiation based on the processed Helioseismic and Magnetic Imager vector magnetograms, Atmospheric Imaging Assembly 1600 A, and RHESSI hard X-ray observations. Three flare events, the M6.6 flare on 2011 February 13, the X2.2 flare on 2011 February 15, and the X2.1 flare on 2011 September 6, in two active regions AR 11158 and AR 11283 are investigated. We analyze the source field strength in the photosphere, which is defined as the magnitude of the observed magnetic field deviation from the potential field. It is found that one of the strong source field regions above the magnetic polarity inversion line well connects the initial bright kernels of two conjugate ribbons. The results imply that the distribution of the photospheric source field strength can be used to locate the initiation site of flaring loops regardless of the configuration of pre-flare magnetic fields or the evolution of active regions. Moreover, the field configuration in the strong source field regions tends to become more inclined after flares, which is consistent with the coronal implosion scenario. We also employ a fast method to derive the total current density from the photospheric vector magnetogram in the framework of force-free field. This method can provide fast estimation of photospheric current density within a reasonable accuracy without appealing for the more accurate calculation from a model extrapolation. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000335810700072 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6386]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Natl Cent Univ, Inst Space Sci, Jhongli 32001, Taiwan 2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Univ Alaska, Inst Geophys, Fairbanks, AK 99775 USA 4.Univ Alabama, Ctr Space Plasma & Aeron Res, Dept Mech & Aerosp Engn, Huntsville, AL 35899 USA 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100864, Peoples R China 6.Natl Ctr High Performance Comp, Hsinchu 30076, Taiwan |
| 推荐引用方式 GB/T 7714 | Yang, Ya-Hui,Chen, P. F.,Hsieh, Min-Shiu,et al. CHARACTERISTICS OF THE PHOTOSPHERIC MAGNETIC FIELD ASSOCIATED WITH SOLAR FLARE INITIATION[J]. ASTROPHYSICAL JOURNAL,2014,786(1). |
| APA | Yang, Ya-Hui,Chen, P. F.,Hsieh, Min-Shiu,Wu, S. T.,He, Han,&Tsai, Tsung-Che.(2014).CHARACTERISTICS OF THE PHOTOSPHERIC MAGNETIC FIELD ASSOCIATED WITH SOLAR FLARE INITIATION.ASTROPHYSICAL JOURNAL,786(1). |
| MLA | Yang, Ya-Hui,et al."CHARACTERISTICS OF THE PHOTOSPHERIC MAGNETIC FIELD ASSOCIATED WITH SOLAR FLARE INITIATION".ASTROPHYSICAL JOURNAL 786.1(2014). |
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来源：国家天文台
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