Publication Date:
2014-05-08
Description:
A new approach of electron magnetohydrodynamics (EMHD) is developed by including the anisotropy of the electron pressure tensor to take Biermann battery effect into account. Based on the model, the dispersion relation of slow and fast electron magnetosonic modes are derived. A Korteweg-de Vries (KdV) equation is then obtained from the wave equation to get a solution of one-dimensional slow-mode soliton. Furthermore, according to measurements of Cluster and THEMIS, we find a good agreement between the theory and observations of magnetic field depression and perpendicular pressure increase.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics
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