Ion acoustic solitons and double layers in electron–positron–ion plasmas with dust particulates

Propagation of small but finite amplitude ion acoustic solitons and double layers are investigated in electron–positron–ion plasmas in presence of highly negatively charged impurities or dust. The presence of negatively charged dust particulates can result in existence of two critical concentrations...

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Bibliographic Details
Published in:Astrophysics and space science 2008-04, Vol.314 (1-3), p.121-127
Main Authors: Ghosh, Samiran, Bharuthram, R.
Format: Article
Language:English
Subjects:
Acoustics
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Charged particles
Cosmology
Dust
Ions
Observations and Techniques
Original Article
Particulates
Physics
Physics and Astronomy
Plasma
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:Propagation of small but finite amplitude ion acoustic solitons and double layers are investigated in electron–positron–ion plasmas in presence of highly negatively charged impurities or dust. The presence of negatively charged dust particulates can result in existence of two critical concentrations of ion–electron density ratio α . One of them α D decides the existence of double layers, whereas the other one α R decides the nature of the solitons and double layers. The system supports both compressive and rarefactive solitons as well as double layers. The parameter regimes of transitions from compressive to rarefactive solitons and double layers are also specified.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-008-9748-0