STATIONARY MHD WAVES MODIFIED BY HALL CURRENT COUPLING .2. INCOMPRESSIBLE-FLOW

In this paper we consider the incompressible limit of the general deve lopment presented in Woodward and McKenzie [Planet. Space Sci. 42, 463 -479, 1994], who analyze the system of stationary waves generated by a point source current immersed in a flowing magnetoplasma including Ha ll current effects. There are two wave modes present in this limit, na mely the fast and slow modes, both of which are semi-field-aligned, an d the slow mode experiences a resonance at the proton gyrofrequency. I n contrast to the compressible situation, the magnetic pressure pertur bation displays a Laplacian decay in addition to the characteristics o f the fast and slow modes. Furthermore in the very sub-Alfvenic flow l imit, the parallel current and magnetic pressure disturbances together with the associated electric potential perturbation are predominantly of fast mode character.