RESONANT ABSORPTION OF MHD SURFACE-WAVES IN AN ARCADE WITH A CONTINUOUS BOUNDARY

We consider an isolated potential magnetic arcade with a thick boundar y forming a layer with strongly nonpotential field, that separates the interior of the arcade from the ambient nonmagnetized plasma of the s olar corona. It is shown that, in this case, local surface waves, havi ng a relatively large wavelength compared to the layer thickness, can resonantly generate a continuous MHD slow mode spectrum within the lay er. The obtained rate coefficient depends on the value of the field gr adient at the place where the resonance occurs and it vanishes when th e gradient tends to infinity.