【摘要】 1980年11月2日到11日(9日除外),我们拍摄到No.431活动区(紫台编号)太阳黑子的精细结构照片。以此为基础,我们分析了该活动区的形态演变特性。同时,从精细结构照片放大图上测量出半影纤维扭转角等基本参量,由此计算出黑子的磁能和所释放的扭转自由能。比较在此期间产生的耀斑和磁能的变化,表明耀斑的爆发很可能是由扭转自由能供给的。更多还原

【Abstract】 A set of high-resolution sunspot photographs of Active Region No.431 was taken from Nov. 2 to 11 in 1980. On the basis of these data the morphological characters of the active region are analysed. Meanwhile, the twisting angle of the penumbral filaments of sunspots and other parameters are measured and used to calculate the magnetic energy of sunspots. It is shown that the flares observed in the active region could be caused by the releases of the free magnetic energy of sunspots through the comparison of the solar flares with the magnetic energy of sunspots.更多还原