NOAA6361活动区现象分析

本文分析了ＮＯＡＡ６３６１活动区中的一些现象，发现该活动区在衰亡阶段经历了两次同极性黑子的复合过程，复合后的黑子本影间均有光桥存在，观测结果倾向于支持Ｐａｒｋｅｒ１９７９年提出的黑子多磁流管模型。１４日复合后的黑子本影还顺时针方向旋转了约７０度角，从半影纤维的同样顺时针旋转可以认为：该黑子的半影磁场并非是普遍认为的简单的本影磁场的发散部分。我们还观测到另外两个比较有趣的现象：①δ黑子中的ｐ极性黑子

ANALYSIS OF ACTIVE REGION NOAA 6361

sing the continuous high quality Ha line centre, off-band and white light pictures taken with our 26-cm solar vacuum telescope at Ganyu solar station, Purple Mountain Observatory, we have analysed the evolution of the magnetic configuration,the spots motion and the flares in the active region NOAA 6361, November 12-16,1990. Two or more of the preceding spots were observed to combine into one at the decaying stage on Nov. 14 and 16 respectively. It is found the combined spots of the same polarity do not completely merge but are always separated by a light bridge, which is tend to support Parker's multi-magnetic tube model for sunspots in 1979. The spots after combined clockwisely rotated for both umbra and penumbra on Nov. 14, this means the penumbra magnetic fields may not be simply the diverging part of umbra magnetic fields.Finally, two additional interesting phenomena of this region have been observed:1). The f-polarity spot of a small delta spot is elongated and rotated, due to the rapid departure motion of the p-polarity spot from the delta spot, which results in a series of Ha and X-ray flares being triggered, including a II-class Ha event with a M-class X-ray event.2). The off-band observation of an AFS in an emerging flux region shows abnormal motion with the classic results from Bruzek in 1969. Here red shift is for left legs of magnetic flux tubes,while blue shift for right legs.