Ion acoustic shock waves in dissipative plasma with superthermal electrons and positrons

Details Ion acoustic shock waves in dissipative plasma with superthermal electrons and positrons Ion acoustic shock waves in dissipative plasma with superthermal electrons and positrons

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.331..169p&link_type=abstract

Astrophysics and Space Science, Volume 331, Issue 1, pp.169-174

Astronomy and Astrophysics

Astrophysics

10

Shock Waves, Ion Acoustic, Superthermal Electrons

Scientific paper

Ion acoustic shock waves (IASWs) are studied in a plasma consisting of electrons, positrons and ions. Boltzmann distributed positrons and superthermal electrons are considered in the plasma. The dissipation is taken into account the kinematic viscosity among the plasma constituents. The Korteweg-de Vries-Burgers (KdV-Burgers) equation is derived by reductive perturbation method. Shock waves are solutions of KdV-Burgers equation. It is observed that an increasing positron concentration decreases the amplitude of the waves. Furthermore, in the existence of the kinematic viscosity among the plasma, the shock wave structure appears. The effects of ion kinematic viscosity ( η 0) and the superthermal parameter ( k) on the ion acoustic waves are found.

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