The influence of radiative damping on the modes of a magnetized isothermal atmosphere

Details The influence of radiative damping on the modes of a magnetized isothermal atmosphere The influence of radiative damping on the modes of a magnetized isothermal atmosphere

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997assl..225..277b&link_type=abstract

SCORe'96 : Solar Convection and Oscillations and their Relationship, Proceedings of a workshop, held in Aarhus, Denmark, May 27

Physics

1

Solar Physics, Mhd, Magnetic Fields, Atmosphere, Oscillations

Scientific paper

We examine the influence of radiative damping on the modes of an isothermal magnetized plasma. This investigation is an extension of earlier work by Hasan \& Christensen-Dalsgaard (1992) and Banerjee, Hasan \& Christensen-Dalsgaard (1995, 1996), which treated the effects of a uniform vertical magnetic field on the adiabatic modes of a stratified atmosphere. We focus on the properties of the Lamb mode and examine its interaction with a magnetic mode. We show that radiative dissipation can significantly alter the Lamb-mode frequency and lead to a enhanced damping of the waves at the avoided crossings in the $k-\omega$ diagram. This mechanism could be important for wave damping in flux tubes on the Sun.

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