暂现活动区磁流浮现与磁场位型的关系  

Relationship between magnetic flux emergence and the magnetic field configuration in an ephemeral active region

作　　者：裴世鑫[1] 袁润娥[1] 宗位国[2] 周树信 

机构地区：[1]南京信息工程大学物理与光电工程学院,江苏南京210044 [2]中国气象局国家卫星气象中心,北京100081 [3]天华化工机械及自动化研究设计院,甘肃兰州730060

出　　处：《西北师范大学学报（自然科学版）》2013年第4期46-51,共6页Journal of Northwest Normal University(Natural Science)

基　　金：江苏省自然科学基金资助项目(BK2011829);2010年江苏省高校"青蓝工程"中青年学术带头人培养项目;2011年江苏省研究生创新计划资助项目(N0782002098)

摘　　要：利用搭载在SDO卫星上的磁成像仪(HMI)获取的磁图数据和大气成像仪(AIA)获取的450nm处太阳光球层辐射强度数据,对一个暂现活动区(EAR)的磁场位型做了分析.发现EAR的磁场位型由最初的南北向分布演变为东西向分布,并从磁极区域磁通量及其变化速率、磁场方向与赤道夹角以及磁极重心之间距离的相对变化等三方面,对磁场位型的演变过程做了研究.结果表明,本次事件具备磁流浮现的基本特征,此过程中EAR的磁场逐渐平行于周围磁场,推测EAR磁场结构的改变是由扭曲磁流管的浮现所致.The magnetogram data obtained by the helioseismic and magnetic imager（HMI） and the data of photosphere radiation intensity at 450 nm obtained by the atmospheric imaging assembly（AIA） onboard the solar dynamics observatory（SDO） are used to analyze the magnetic structure in an ephemeral active region（EAR）. The results show that the magnetic field distribution evolves from north-south distribution to east-west distribution. During the process, magnetic flux and flux rate in each pole are discussed. In addition, both the angle between the magnetic field direction and the equator and the distance of any two poles are also analyzed. It demonstrates that this event has the essential characteristics of magnetic flux

关 键 词：空间物理 暂现活动区 扭曲磁流管 磁场结构 

分 类 号：P353[天文地球—空间物理学]