带有平行电场的Alfven激波样结构──极光粒子加速机制  

ALFVEN SHOCK-LIKE STRVCTURE WITH A PARALLEL ELECTRIC FIELD──ACCELERATION MECHANISM OF AURORAL PARTICLE

作　　者：宋礼庭[1] 卢先和[2] 王德 

机构地区：[1]北京大学地球物理系,100871 [2]中国科学院空间科学与应用研究中心 [3]中国科学院紫金山天文台

出　　处：《空间科学学报》1999年第1期15-21,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金!49574238

摘　　要：动力Alfven波在色散和反常耗散作用下，非线性演化成类似激波样的结构．它携带的平行电场为极光粒子加速提供了新机制．Wieja卫星观测到相似的孤立Alfven结构．As a result of dispersion and dissipation the kinetic Alfven wave nonlinearlyevolves into a shock-like structure. It carries a parallel electric field along the magnetic field, and offers a new mechanism for auroral particle acceleration. The wavemeasurement above the polar ionosphere by Freja satellite found a similar solitaryAlfven structure, which is comparable to the shock-like structure as predicted bythe theory.

关 键 词：动力Alfven波 平行电场 极光加速 激波样结构 

分 类 号：P427.33[天文地球—大气科学及气象学]