1984年2月18日耀斑后环速度场的分析  

STUDY OF THE VELOCITY FIELD OF THE POST-FLARE LOOP ON FEBRUARY 18,1984

作　　者：李可军[1] 

机构地区：[1]中国科学院云南天文台

出　　处：《空间科学学报》1996年第1期51-55,共5页Chinese Journal of Space Science

基　　金：中国科学院院长基金

摘　　要：本文研究了耀斑后环内物质在太阳重力、磁压力梯度和气体压力梯度联合作用下的下落运动，并在非等温状态及定常假定下计算了环内物质分布．计算结果表明：在环的中上部，下落运动可当作太阳重力作用下的自由下落运动；在环的底部，环内物质密度和磁场强度对物质下落运动影响较显著．The downward motion of materials within the post-flare loop of February 18,1984 under the joint action of solar gravity and the both gravity and the both gradients of the magnetic field pressure and atmospheric pressure is studied. Thevelocity distribution along the loop is calculated in the case that the temperaturechanges within the loop but the shape of the loop changes less with time. The results obtained show that the downward motion at both the top and the middle ofthe loop can be regarded as free d.ownward motion due to solar gravity, but atthe bottom of the loop, the motion is obviously affeCted by material density andthe magnetic field strength within the loop.

关 键 词：太阳 耀斑后环 速度场 

分 类 号：P182.52[天文地球—天文学]