Abstract
The occurrence of magnetoacoustic surface waves at a single magnetic interface one side of which is field-free is explored for the case of non-parallel propagation. Phase-speeds and penetration depths of the waves are investigated for various Alfvén speeds, sound speeds and angles of propagation to the applied field. Both slow and fast magnetoacoustic surface waves can exist depending on the values of sound speeds and propagation angle. The fast waves penetrate more than the slow waves.
The parallel propagation of fast and slow magnetoacoustic surface waves on a magnetic-magnetic interface is investigated. The slow surface wave is unable to propagate below a critical sound speed. In a low β-plasma, only the fast mode exists (0 ≠ 0).
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Jain, R., Roberts, B. Magnetoacoustic surface waves at a single interface. Sol Phys 133, 263–280 (1991). https://doi.org/10.1007/BF00149890
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DOI: https://doi.org/10.1007/BF00149890