摘要
从三维非广延分布函数及流体动力学方程组出发,研究了非广延分布等离子体中电子的非广延性对离子声孤波结构和性质的影响.通过理论解析获得Sagdeev赝势方程,从该方程出发研究了不同q所对应离子声孤波的振幅、宽度及电子数密度的空间分布.数值结果表明:离子声孤波存在的可允许范围由参量q决定,并且电子的非广延效应对离子声孤波的空间特性及电子密度分布均有较大影响.
Based on the three-dimensional nonextensive distribution function and hydrodynamic equations, the effects of nonextensive electron distribution on the structures and properties of ion-acoustic solitary waves have been studied. It is analytically derived an equation involving the Sagdeev-type pseudo-potential, which is used to study the amplitude and width of ion-acoustic solitary waves, and the spatial distribution of electron number density with different nonextensive parameter q. The numerical results suggest that the allowable domain where the ion-acoustic solitary waves may exist is determined by q, and the spatial profile of the ion-acoustic solitary waves and electron density distribution are significantly affected by the electron nonextensive effects.
出处
《天文学报》
CSCD
北大核心
2015年第1期17-25,共9页
Acta Astronomica Sinica
基金
国家自然科学基金理论物理专项基金项目(11377153)
江西省教育厅科学技术基金项目(GJJ14464)
江西理工大学科研基金重点项目(NSFJ2014-K17)
江西理工大学科研基金一般项目(nsfj2014-g26)资助
江西理工大学博士启动基金项目(jxxjbs13024)
江西理工大学应用科学学院科研基金项目(YJ2014-11)
