Sep 25 – 30, 2023
Protea Hotel King George
Africa/Johannesburg timezone

Nonlinear electrostatic fluctuations in the Earth's magnetosphere

Sep 29, 2023, 8:30 AM
25m
Regency Room (Protea Hotel King George)

Regency Room

Protea Hotel King George

Invited Talk Physics Research Plasma Physics

Speaker

Dr Odutayo Rufai (NASA/CUA)

Description

Large-amplitude electrostatic solitary waves (ESWs) associated with asymmetric magnetic reconnection at the Earth’s magnetopause are studied in a four-component plasma composed of a mixture of the magnetosheath and magnetosphere plasma of a cold, warm and hot electron populations, and background ions. The species are modeled as adiabatic fluids except for the hot electrons which have a kinetic vortex-like velocity distribution. Using the Sagdeev pseudopotential technique, for the plasma parameters recorded by the Magnetospheric Multiscale (MMS) mission in the magnetosheath side of the ion diffusion region, existence regime of the nonlinear electrostatic solitary wave structures is obtained. The results agree with the magnetosheath electrostatic waves having amplitudes of 100s mV/m and frequencies up to 3.2 kHz observed by the MMS.

Abstract Category Fluid & Plasma Physics

Primary author

Dr Odutayo Rufai (NASA/CUA)

Presentation materials