On existence conditions of dust-acoustic solitary waves in a plasma with positively charged dust

被引：7
|
作者：
Marif, H. [1 ]
Djebli, M. [1 ]
机构：
[1] USTHB, Theoret Phys Lab, Fac Phys, Algiers, Algeria
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2012年 / 337卷 / 02期
关键词：
Solitary waves; Complex plasma; Ionosphere; TEMPERATURE; IONOSPHERE;
D O I：
10.1007/s10509-011-0864-x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Dust acoustic (DA) solitary wave existence conditions are investigated for positively charged dust particles in the presence of nonthermal electrons. Once Sagdeev pseudo-potential derived through fluid equations, for large amplitude DA waves, the lower limit on Mach number is calculated analytically using the necessary condition for the solitary waves existence. The double layers conditions provides the upper limit on Mach number. This allowed us to numerically investigate the effect of the temperature, density and nonthermal parameters on the solitary waves' characteristics. The present study is devoted to a complex plasma subject to ultraviolet radiations such as the one in the lower earth's ionosphere.
引用
收藏
页码：605 / 611
页数：7
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