摘要
ＡＲ６６５９是２２周以来最重要的一个活动区，它爆发了２２周最强大的高能事件。本文用云南天文台的光球、色球精细结构照片和北京天文台怀柔站的磁场速度场资料，分析了该活动区磁场速度场的二维位形和大耀斑期间的演化特征。本文分析的４个大耀斑均爆发在中性线附近的Ｎ极区磁场梯度大的地方及色球速度场的红移区。偏带观测也显示耀斑物质是向红端移动的。耀斑波沿横场传播在离本黑子群几万至十几万公里的地方激起感生耀斑，在原生耀斑与感生耀斑之间往往有耀斑环相连。此外，本文还从演化特征出发分析了耀斑爆发前活动区等离子体的宏观不稳定性。
AR6659 is one of the most Important active region, which erupted the strongest energy events in Cycle 22. The two-dimensional configuration of the region and the evolutional characteristics of the magnetic and velocity fields of the region are analysed in this paper using the photospheric and chromospheric fine structure pictures of Yunnan Observatory and the magnetic field and velocity field data of Beijing Astronomical Observatory. The four large flares occured at the area of N-polarity with the large magnetic field gradient near the neutral line and the red-shift-area of velocity field in the chromospheric. The off-band observation shown that the material of the flares moved forward to the red end. The flare waves propagated along the horizontal field and stimulated inductive flares at the distance of about 100 thousand km from the sunspot group.There were often flare loops between original flares and inductive ones. In addition, the macroscopic instability of the plasma in the active region before the flare eruption is discussed from the point of view of the evolutional characteristics.
出处
《云南天文台台刊》
CSCD
1994年第3期29-41,共13页
Publications of the Yunnan Observatoty
基金
国家自然科学基金
关键词
太阳活动区
磁场
速度场
耀斑
Solar active region
Magnetic and velocity field
Solar flare
