耀斑后环珥系速度场的定量研究

本文研究了在太阳重力、偶极磁压强梯度和气体压力梯度联合作用下环珥系内物质的下落运动,并在等温、定常假设下用数值方法计算了该环系的二维视向速度场。通过将速度场的理论计算跟文1]中给出的观测速度场拟合,导出了该环系的有关参数及分布。计算表明环系内物质密度和磁场强度对物质下落运动影响较显著。

THE QUANTITATIVE RESEARCH ON THE VELOCITY FIELD OF A POST-FLARE LOOP PROMINENCE SYSTEM

The downward motion of the matter within the post-flare loop system of 1984 February 18 is studied under the joint action of solar gravity and the 'both gradients of dipole magnetic field pressure and atmospheric pressure. The two-dimensional line-of-sight velocity field is calculated by means of a numerical method under the assumption that the temperature keeps unchanged within loop system and the loops are quasi-closed. In the system, some parameters as well as their distribution are derived from the curve fit of both velocity fields between theory and observation. The calculations indicate that the effects of density and magnetic field intensity within the loop system on the downward motion of matter is comparatively large while the effect of the temperature is much small.