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

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...

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Bibliographic Details
Published in:Astrophysics and space science 2012-02, Vol.337 (2), p.605-611
Main Authors: Marif, H., Djebli, M.
Format: Article
Language:English
Subjects:
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmology
Dust
Ionosphere
Observations and Techniques
Original Article
Physics
Physics and Astronomy
Plasma
Solitary waves
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary: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.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-011-0864-x