Ion acoustic soliton in weakly relativistic magnetized electron-positron- ion plasma

A theoretical investigation was made for the ion acoustic wave in a weakly relativistic magnetized electron- positron-ion warm plasma. A Korteweg-de vries equation (KdV) is derived by using a standard reductive perturbation method. It is found that the presence of ion temperature (σ), ratios of positron-to-electron density (β), electron-to-positron temperature (α), and relativistic factor (U_r) significantly modify solitonic behavior. The authors observed that these parameters considerably change the amplitude and width of the solitary wave.