Ion acoustic solitons in a weakly relativistic magnetized warm plasma

摘要

The oblique propagation of nonlinear ion acoustic solitary waves (solitons) in a magnetized low-P, weakly relativistic warm plasma is examined by the Korteweg-de Vries equation. Two types of modes (fast and slow ion acoustic modes) exist in the plasma. The fast mode corresponds to the propagation of compressive solitons, whereas the rarefactive solitons exist for the slow model The amplitude and energy of both types of solitons increase with the angle between the wave vector and magnetic field and also with the relativistic ion drift velocity. The effect of finite ion temperature is to decrease the amplitude nf the soliton and to increase its width. The strength oi. the magnetic field weakens the soliton energy and the width becomes smaller.