1986年2月初太阳活动区的形态研究

根据Marshall空间飞行中心(MSFC)太阳天文台的矢量磁场测量和云南天文台的黑子细节照相资料,作者们详细研究了1986年2月初太阳大活动区(AR4711)的形态和演化。主要结论如下: i)几乎在活动区中每处地方,相距五小时观测到横向磁场排列方向和黑子半影纤维形态之间存在良好的相似性。 ii)利用文4]的方法,推断了本活动区强的垂直电流源和强的水平电流渠道。 iii)与1972年8月初著名的太阳活动区(McMath 11976)相类似,沿老活动区的中性线的新浮磁通管的两足点(偶极黑子)的分离运动导致了一个密集四极磁结构的形成。 iv)新浮磁通管似乎是本活动区最强的电流系统。 上述结论将为进一步研究本区电流/磁场环系的演化及其与耀斑活动的关系提供一个基础数据。

A Morphological Study of the Active Region in Early February 1986

Based on the data of the vector magnetic fields measured at MSFC/NASA and the pictures of a sunspot group photographed at Yunnan Observatory in early February 1986, the authors detail the photospheric morphology and evolution of the active region AR4711. The main results are:i) There is a close morphological correlation between penumbral filaments (PF) and the transversal magnetic fields (TMF) nearly everywhere in the region.ii) Some strong sources of the vertical current and some strong channels of the horizontal current flow at the lower solar atmosphere have been inferred.iii) Similar to the famous - active region McMath No. 11976 in early August 1972, the separation of both footpoints of the new emerging flux along the north-south neutral line of the old bipolar group leads to forming a compact quadrupole structure of all group.iv) The new emerging flux seems to be the strongest electric current system in the region.These results will be fundamental for further studying the evolution of the current/magnetic loop systems and their correlation to the flare activity in AR4711.