Effect of viscosity on propagation of MHD waves in astrophysical plasma

Wednesday, 13 February 2019
Fountain III/IV (Westin Pasadena)
Alemayehu Mengesha Cherkos II, Addis Ababa Univesity - AAU, Institute of Geophysics Space Science and Astronomy, Addis Ababa, Ethiopia; Addis Ababa University, Institute of Geophysics Space Science and Astronomy, Addis Ababa, Ethiopia
Abstract:
We determine the general dispersion relation for the propagation of magnetohydrodynamic (MHD) waves in an astrophysical plasma by considering the effect of viscosity with an anisotropic pressure tensor. Basic MHD equations have been derived and linearized by the method of perturbation to develop the general form of the dispersion relation equation. Our result indicates that an astrophysical plasma with an anisotropic pressure tensor is stable in the presence of viscosity and a strong magnetic field at considerable wavelength.
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