Linear resistive magnetohydrodynamic computations of resonant absorption of acoustic oscillations in sunspots

Details Linear resistive magnetohydrodynamic computations of resonant absorption of acoustic oscillations in sunspots Linear resistive magnetohydrodynamic computations of resonant absorption of acoustic oscillations in sunspots

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...384..348g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 384, Jan. 1, 1992, p. 348-360. Research supported by Dienst voor Programmat

Astronomy and Astrophysics

Astrophysics

41

Magnetohydrodynamics, Solar Oscillations, Sunspots, Acoustic Excitation, Resonance Lines, Solar Magnetic Field

Scientific paper

A numerical study of the resonant absorption of p-modes by sunspots is performed in linear resistive MHD. A parametric evaluation shows that the efficiency of the absorption mechanism depends significantly on both the equilibrium model and the characteristics of the p-modes. Results from this numerical study of the relevant parameter domain indicate that the resonant absorption of p-modes is more efficient in larger sun spots with twisted magnetic fields. This is particularly true for p-modes with higher azimuthal wave numbers.

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