Effects of two-temperature superthermal electrons on dust-ion-acoustic solitary waves and double layers in dusty plasmas Article

Alam, MS, Masud, MM, Mamun, AA. (2014). Effects of two-temperature superthermal electrons on dust-ion-acoustic solitary waves and double layers in dusty plasmas . ASTROPHYSICS AND SPACE SCIENCE, 349(1), 245-253. 10.1007/s10509-013-1639-3

cited authors

  • Alam, MS; Masud, MM; Mamun, AA

authors

abstract

  • Dust-ion-acoustic (DIA) waves in an unmagnetized dusty plasma system consisting of inertial ions, negatively charged immobile dust, and superthermal (kappa distributed) electrons with two distinct temperatures are investigated both numerically and analytically by deriving Korteweg-de Vries (K-dV), modified K-dV (mK-dV), and Gardner equations along with its double layers (DLs) solutions using the reductive perturbation technique. The basic features of the DIA Gardner solitons (GSs) as well as DLs are studied, and an analytical comparison among K-dV, mK-dV, and GSs are also observed. The parametric regimes for the existence of both the positive as well as negative SWs and negative DLs are obtained. It is observed that superthermal electrons with two distinct temperatures significantly affect on the basic properties of the DIA solitary waves and DLs; and depending on the parameter μc (the critical value of relative electron number density μe1), the DIA K-dV and Gardner solitons exhibit both compressive and rarefactive structures, whereas the mK-dV solitons support only compressive structures and DLs support only the rarefactive structures. The present investigation can be very effective for understanding and studying various astrophysical plasma environments (viz. Saturn magnetosphere, pulsar magnetosphere, etc.). © 2013 Springer Science+Business Media Dordrecht.

publication date

  • January 1, 2014

published in

Digital Object Identifier (DOI)

start page

  • 245

end page

  • 253

volume

  • 349

issue

  • 1