Previous discussions of Alfvdn wave propagation across an inhomogeneous plasma predicted that shear Alfvin waves become singular (resonant) at the w = kzuA layer and that there is a strong wave absorption at this layer giving localized ion heating. In this paper the three standard derivations of the Alfvdn ‘resonance’ (incompressible magnetohydrodynamics, compressible magnetohydrodynamics, and ...

Abstract Intervals of intense electromagnetic, broadband plasma waves are reported in the near-Sun solar wind. These identified as kinetic Alfvén (KAWs), based on comparison between data and theory for their observed electric- to magnetic-field ratio, magnetic compressibility, a function frequency. In contrast KAW observations at 1 au, KAWs wind found be spatially inhomogeneous, preferentially ...