Nonlinear electrostatic structures and stopbands in a three-component magnetosheath plasma

Large amplitude parallel propagating electric field structures of nonlinear electron-acoustic waves are examined in an unmagnetized magnetosheath plasma. Based on the observations and simulations by Ergun et al. (2016), plasma side ion diffusion layer is modeled a 3-component adiabatic fluid dynamic consisting cold magnetospheric (MSP) electrons, background ions. Using Sagdeev pseudopotential technique, for parameters recorded Magnetospheric Multiscale (MMS) mission region, existence regime electrostatic solitary wave obtained with possibilities stopbands (forbidden gap region). Stopbands or forbidden region exists even when drift velocity electron beam zero. The becomes wider Mach numbers regions supporting become larger increase beam. results agreement having amplitudes 100s mV/m frequencies up to 3.2 kHz observed MMS.