Solitary Alfvén Waves
Abstract
We present the solitary Alfvén wave as an ideal nonlinear Alfvénic solution in the solitary far-field limit and construct a three-dimensional numerical model -- an Alfvénon. The model is characterized by an unperturbed far field, quasi-constant |B|, and open field-line topology. Direct MHD simulations of the Alfvénon show coherent finite-time propagation, confirming that it behaves as a nonlinear solitary Alfvénic solution under ideal MHD evolution.
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