太阳活动区光球磁场特征的量化  

Quantitative Characterization of Photospheric Magnetic Field in Solar Active Regions

作　　者：杨晓华[1] 王栖溪 夏仲飞 包赟[1] 彭代亮 田天[3] 徐龙 YANG Xiaohua;WANG Qixi;XIA Zhongfei;BAO Yun;PENG Dailiang;TIAN Tian;XU Long(31010 Troops of PLA,Beijing 100081;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094;61741 Troops of PLA,Beijing 100094;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012)

机构地区：[1]中国人民解放军31010部队,北京100081 [2]中国科学院空天信息创新研究院,北京100094 [3]中国人民解放军61741部队,北京100094 [4]中国科学院国家天文台,北京100012

出　　处：《空间科学学报》2022年第1期34-43,共10页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(11033001)。

摘　　要：为有效解决太阳活动区磁场特征量化问题,对所有SOHO卫星MDI磁图预处理后,分割出日面角45°以内的活动区,分析活动区投影面积变形来源,研究建立Cosine面积校正因子,校正活动区面积,构建具有21个特征参数的活动区磁场特征量化指标体系,通过主成分分析法对量化结果计算累积方差,结合活动区10486爆发X17.2级耀斑时的磁场变化定性分析。结果表明:强梯度极性分隔线权重磁场绝对值之和R、极性分隔线长度L_(PS)、强梯度极性分隔线长度L_(sg)和强梯度极性分隔线磁场绝对值之和Φ_(PSL)能够解释活动区磁场结构变化;磁场通量绝对值总和Φ_(uns)、磁场负通量总和Φ_(-)、磁场值代数和Φ_(tot)和磁场绝对值之和的平均值Φ_(mean)能够解释活动区磁场通量变化。Φ_(PSL)为本文新构建特征参数。上述参数可有效监测耀斑爆发前后活动区磁场结构和磁场通量的变化情况,量化结果可作为耀斑、质子事件监测及耀斑预报模型输入,为开展太阳爆发活动监测预警提供技术支撑。In order to resolve the quantitative technique of photospheric magnetic field in solar active regions,all SOHO Michelson Doppler Interferometer(MDI)magnetograms from 1996 to 2011 have been used,and all solar active regions located within 45°solar surface angle have been segmented.The projection distortion of magnetogram area have been studied,then the consine factors for area correction have been established,and solar active regions area have been corrected.Based on the photospheric parameters quantified by Ref.[18–20],the index system has been built and improved,and it has been used to quantity characterization of magnetic field.The quantitative result has been analyzed by the Principal Component Analysis(PCA),and magnetic field of active region10486 erupted X17.2 flare has been analyzed.The results show that R,L_(PS),L_(sg)andФ_(PSL)can explain the change of magnetic field structure in active region,andФ_(uns),Ф_(–),Ф_(tot),andФ_(mean)can explain the change of magnetic flux in active region.Ф_(PSL) is the new characteristic parameters in this paper.The above parameters can monitor the changes of magnetic field structure and magnetic flux in the active region effectively before and after the flare eruption;the quantitative results could be used as the input of flare,proton event monitoring and flare prediction model,and provided technical support for the monitoring and early warning of solar flare activity.

关 键 词：太阳活动区 面积校正 磁场 量化体系 

分 类 号：P353[天文地球—空间物理学]