Article

Browse

Now showing 1 - 2 of 2

Growing electrostatic modes in the isothermal pair plasma of the pulsar magnetosphere
(© 2011 Springer Science+Business Media B.V., 2012) U. A., Mofiz; Amin, Md. Ruhul; Shukła, Padma Kant; Department of Mathematics and Natural Sciences
It is shown that a strongly magnetized isothermal pair plasma near the surface of a pulsar supports low-frequency (in comparison to electron cyclotron frequency) toroidal electrostatic plasma modes in the equatorial region. Physically, the thermal pressure coupled with the magnetic pressure creates the low frequency oscillations which may grow for particular case of inhomogeneities of the equilibrium magnetic field and the pair plasma density.
Langmuir dark solitons in dense ultrarelativistic electron-positron gravito-plasma in pulsar magnetosphere
(© 2013 Springer, 2013) U. A., Mofiz; Amin, M. R.; Department of Mathematics and Natural Sciences
Nonlinear propagation of electrostatic modes in ultrarelativistic dense elelectron-positron gravito-plasma at the polar cap region of pulsar magnetosphere is considered. A nonlinear Schrödinger equation is obtained from the reductive perturbation method which predicts the existence of Langmuir dark solitons. Relevance of the propagating dark solitons to the pulsar radio emission is discussed.