龙卷日珥后期的环形结构内的物态分布

本文依据１９９０年８月２９日龙卷状爆发日珥后期形成的环形结构形状，根据力平衡条件，求得了该环形结构内的运动速度、物质密度和磁场强度随环形弧长的分布，结果表明：在环的衰退期，环内物质由环顶向下运动基本上是一种在太阳重力作用下的自由下落运动；环内物质密度和磁场强度与环的形状密切相关．

DISTRIBUTION OF SOME PHYSICAL PARAMETERS IN THE LOOP-LIKE STRUCTURE FORMED IN THE DECAY OF A TORNADO PROMINENCE

Geometrical configuration of a loop-like structure in solar atmosphere is usually determined by physical features in it.According to conservation of mass,the equation of state in a loop tube, and conservations of momentum along normal direction and inclination direction of a loop tube respectively, a loop-like flux tube of the tornado prominence on August 29,1990 is calculated and the velocity.density and the'magnetic field strength distributions along the loop-like flux tube of the tornado prominence are given in this paper. Results obtained show that the downward motion of the matter within the flux tube is mainly determined by gravity,meanwhile,the density and magnetic field strength distributions are closely related to the geometrical configuration of the flux tube.