Nonlinear Resonant MHD Waves In The Atmosphere Of The Sun

Details Nonlinear Resonant MHD Waves In The Atmosphere Of The Sun Nonlinear Resonant MHD Waves In The Atmosphere Of The Sun

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.446..155b&link_type=abstract

8th SOHO Workshop: Plasma Dynamics and Diagnostics in the Solar Transition Region and Corona. Proceedings of the Conference hel

Computer Science

Sound

1

Scientific paper

We consider driven resonant nonlinear MHD waves in dissipative steady plasmas to study the effect of steady flows on the nonlinear resonant heating behaviour of MHD waves The nonlinear analogue of the connection formulae for slow MHD waves are derived. The nonlinear theory of driven MHD developed is then used to study the interaction of sound waves with one-dimensional isotropic steady plasmas modelling, e.g., the wave interaction in the magnetic canopy. We find that a steady equilibrium shear flow can significantly influence the nonlinear resonant absorption in the limits of thin inhomogeneous layer and weak nonlinearity. The presence of an equilibrium flow may therefore be important for the nonlinear resonant MHD wave phenomena. A parametric analysis also shows the nonlinear part of resonant absorption can be strongly enhanced by the equilibrium flow.

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