1990年8月29日龙卷日珥的观测研究

１９９０年８月２９日在太阳东边缘（Ｅ９０；Ｓ１２，ＮＯＡＡ／ＵＳＡＦ６２４１）爆发了一个龙卷日珥，本文对这个龙卷日珥进行了详细的形态分析和光谱诊断，结果表明：（１）龙卷日珥有规则地螺旋运动上升，上升到最大高度后，日珥内物质无规则地纷纷下坠，这种螺旋运动可能是带电粒子漂移运动产生的电场与日珥内冻结磁场相互作用的结果；（２）龙卷日珥形态快速变化，最后呈规则的环状结构；（３）龙卷日珥的形态可能是一个重要的因素，它体现了局部区域磁场结构的变化。本文提出了一种可能的磁场结构模型，对观测结果给予了较好的解释。

Observation and Study of the Tornado-like Prominence on August 29, 1990

On August 29, 1990, a tornado-like prominence erupted at the eastern limb of the sun (E90, S12, NOAA/USAF 6241). The mopohological analysis and spectral diagnosis of the prominence have been given in this paper. It is found that: (1) The material in the prominence spirally rose in the regular way, then after reaching the climax, it irregularly dropped in succession. The helix motion is possibly explained as the interaction between the magnetic field frozen in the prominence and the electric field caused by the double pole diffusion in plasma. (2) The tornado-shaped prominence had the shape changed quickly, and finally appeared as a regular loop structure. (3) The shape of a prominence and its changes with time could be an important factor for studing its properties. A qualitative model of the magnetic configuration which gives a possible explanation of the observed results has been proposed in this paper.