Magnetoacoustic gravity surface waves with flows

Abstract

The effect of uniform flows on the characteristics of magneto acoustic-gravity surface waves at a single interface when both the magnetic field and the propagation vector are parallel to each other is studied. The region above the interface is permeated by a uniform horizontal magnetic field. The lower region is field free. The temperature on both sides of the interface is assumed to be uniform, with a discontinuity along the interface. The dispersion relation for the fluid which is compressible and having large conductivity is derived in the linear context. Depending on the temperature structure, the interface supports one or two surface modes in the absence of gravity. Certain limiting cases are discussed.