Modulated wave packets in pulsar magnetospheric plasma

Abstract

An investigation has been made of modulational instability of nonlinear ion acoustic wave in magnetized electron-positron-ion plasma. Three dimensional nonlinear Schrödinger equations (NLSE) is derived by using the standard reductive perturbation technique (RPT) to study the modulational instability. It is found that the coefficient of Nonlinear Schrödinger equation depends upon the positron to electron density ratio and the electron to positron temperature ratio. These coefficients significantly modify the conditions of the modulational instability.