LAUSR

The ion acoustic wave (IAW) and Landau damping in drifting solar wind (SW) plasma are studied kinetically. The derived dispersion relationship and Landau damping have been sketched using the Solar-Terrestrial Relations Observatory spacecraft data. In comparison to the plasma density and temperature, the plasma streaming speed is found to significantly increase the IAW phase speed. The Landau damping is found to strongly depend on the plasma density and temperature and has no dependency on the streaming speed. This study could be helpful in understanding the interplanetary IAW propagation in drifting SW plasma.The ion acoustic wave (IAW) and Landau damping in drifting solar wind (SW) plasma are studied kinetically. The derived dispersion relationship and Landau damping have been sketched using the Solar-Terrestrial Relations Observatory spacecraft data. In comparison to the plasma density and temperature, the plasma streaming speed is found to significantly increase the IAW phase speed. The Landau damping is found to strongly depend on the plasma density and temperature and has no dependency on the streaming speed. This study could be helpful in understanding the interplanetary IAW propagation in drifting SW plasma.