非线性磁声波和动力Alfven波的稀疏孤子解及其在低极尖区的应用  

THE RAREFACTIVE SOLITON SOLUTION OF NONLINEAR MAGNETOSONIC WAVE AND KINETIC ALFVEN WAVE,AND THEIR APPLICATION IN THE LOWER CUSP REGIONS

作　　者：王德焴 黄光力 陈雁萍[1] 

机构地区：[1]中国科学院紫金山天文台,中国科学院物理研究所

出　　处：《空间科学学报》1996年第1期17-23,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金

摘　　要：详细研究非线性磁声波和动力Ａｌｆｖｅｎ波稀疏型孤子解的性质，发现激发的电磁场在方向和形态上有明显区别，并和低极尖区Ｆｒｅｊａ卫星观测资料作比较，说明低频波密度下凹型事件更可能是非线性动力Ａｌｆｖｅｎ波所引起．The properties of the rarefactive soliton solution of nonlinear magnetosonicwave and kinetic Alfven wave have been studied in detail. It is found that the electric and magnetic fields, induced by different nonlinear wave are apprantly different in directions and patterns. These results are compared with the observationdata from Freja satellite in the lower cusp region. It is shown that the low frsquency events with density depression are most possibly due to nonlinear kineticAlfven wave.

关 键 词：极尖区 动力Alfven波 磁声波 电离层 

分 类 号：P352[天文地球—空间物理学] P421.34[天文地球—地球物理学]