On the linear transformation and resonant absorption of Alfven p-modes in sunspots

Details On the linear transformation and resonant absorption of Alfven p-modes in sunspots On the linear transformation and resonant absorption of Alfven p-modes in sunspots

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...98...39z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 98, July 1985, p. 39-50.

Physics

11

Magnetohydrodynamic Stability, Magnetohydrodynamic Waves, Propagation Modes, Solar Activity, Sunspots, Coupled Modes, Energy Transfer, Linear Transformations, Wave Attenuation

Scientific paper

The author analyses the linear transformation of Alfvén p-modes into quasisurface waves and the resonant absorption of Alfvén p-waves in a slowly varying medium with a density gradient, parallel to the ambient homogeneous magnetic field. It is pointed out that the energy transfer from Alfvén p-waves to quasisurface waves appear to take place in sunspots. The results obtained also suggest that Alfvén p-waves generated by overstability in sunspots may be absorbed in deep layers under sunspots. Moreover, it is very likely that part of the downward wave flux is reflected and hence it is possible that essentially the energy from sunspots is transported outward by magnetogravitational waves, to which Alfvén p-waves are transformed.

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