On Alfvén waves in an atmosphere with viscosity and anisotropic resistivity

Details On Alfvén waves in an atmosphere with viscosity and anisotropic resistivity On Alfvén waves in an atmosphere with viscosity and anisotropic resistivity

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..537..192c&link_type=abstract

WAVES IN DUSTY, SOLAR, AND SPACE PLASMAS. AIP Conference Proceedings, Volume 537, pp. 192-199 (2000).

Physics

Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation, Magnetohydrodynamic Waves, Magnetohydrodynamics And Plasmas

Scientific paper

We consider dissipative Alfvén waves in a viscous atmosphere with a magnetic field, so that the electrical conductivity is considered as a non-diagonal tensor. Under a vertical uniform magnetic field we consider transverse magnetic and velocity perturbations. We obtain two decoupled second-order systems to right and left polarized Alfvén waves. The first electrical diffusivity χ1 and the viscous diffusivity ɛ are associated with ``real'' damping; the second electrical diffusivity χ2 is associated with ``imaginary damping''. Boundary conditions are imposed in order to obtain the velocity perturbation spectrum of an Alfvén wave. The velocity perturbation is plotted versus altitude over a distance of five scale heights, for different values of the parameters. .

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