Nonlinear interaction of 3D kinetic Alfvén wave and whistler wave in solar wind plasmas

Abstract

In the present work, the nonlinear evolution of 3D kinetic Alfvén wave (KAW) has been investigated in solar wind plasmas. By taking the adiabatic response of background density the nonlinearity arises because of ponderomotive effects. The dynamical equations governing the dynamics of 3D KAW and whistler are obtained. We have performed the numerical simulation using pseudospectral method to study the evolution of the nonlinear localized structures of KAW in the solar wind at 1 AU. The interaction between 3D KAW and the amplification of weak whistler signal propagating in the localized structures of KAW has also been studied semi-analytically to have an insight of the localization process. The relevance of the present work to the solar wind turbulence is discussed.