Magnetosonic shock waves in dense astrophysical electron–positron–ion plasmas

Abstract

Multifluid quantum magnetohydrodynamic model (QMHD) is used to investigate small but finite amplitude magnetosonic shock waves in dense) electron–positron–ion (e–p–i) plasmas. The Korteweg–de Vries–Burgers (KdVB) equation is derived by using reductive perturbation method. It is noticed that variations in the positron density modify the profile of magnetosonic shocks in dense e–p–i plasmas significantly. The numerical results are also presented by taking into account the dense plasma parameters from published literature of astrophysical conditions, in compact stars. • Magnetoacoustic shock wave are studied in the quantum electron–positron–ion plasmas. • Multifluid quantum magnetohydrodynamic (QMHD) model is employed. • Reductive perturbation method is used to derive Korteweg–de Vries–Burgers equation. • The relevance of the work to neutron stars/pulsars has been pointed out.