Original Article

Astrophysics and Space Science

, Volume 314, Issue 1, pp 121-127

First online:

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

  • Samiran GhoshAffiliated withGovernment College of Engineering and Textile Technology Email author 
  • , R. BharuthramAffiliated withUniversity of the Western Cape

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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.


Electron–positron–ion–dust multi-component plasma Ion acoustic solitary waves Ion acoustic double layers