A study of electrostatic solitary waves in electron-ion plasmas
C.-S. Jao1*, L.-N. Hau1,2
1Institute of Space Science, National Central University, Jhongli, Taiwan
2Department of Physics, National Central University, Jhongli, Taiwan
* presenting author:Chun-Sung Jao, email:csjao@jupiter.ss.ncu.edu.tw
There have been many observational evidences for the existence of electrostatic solitary waves (ESWs) in space plasma environments. Past particle simulation studies have shown that electron-electron streaming instabilities in a background electron-ion plasma may be responsible for the generation of most ESWs observed in space environments. In this study we carry out the numerical and theoretical studies of one and two-dimensional ESWs based on particle-in-cell simulations and fluid theory. The comparisons between the results based on one and two-dimensional kinetic and fluid models may help to clarify the physical processes of the formation of ESWs in collisionless plasmas.

Keywords: electrostatic solitary wave, particle simulation , stream instability, fluid theory, electron-ion plasma