Abstract:
Weak dust-acoustic waves (DAWs) are addressed in a nonthermal charge varying
electronegative magnetized dusty plasmas with application to the Halley Comet. The
dynamics of the nonlinear wave are governed by a Korteweg–de Vries Burger equation
that possesses dispersive shock wave. A weakly nonlinear analysis is carried out to derive
a Korteweg-de Vries-Burger equation. The weak magnetic field is responsible for the
dispersive term, whereas nonsteady dust charge variation is responsible for dissipative
term, i.e., the Burger term. The positive and negative ion nonthermality, the obliqueness,
and magnitude of the magnetic field are found to modify the dispersive and dissipative
properties of the DA shock structure. Our results may aid to explain and interpret the
nonlinear oscillations that may occur in the Comet Halley Plasma.