Hot plasma modes across Reissner-Nördstrom-de Sitter horizon in a Veselago medium.

We investigate wave attributes of hot plasma around a Reissner-Nördstrom-de Sitter (RN-dS) metric in a Veselago medium. A perturbation scheme is implemented on general relativistic magnetohydrodynamical (GRMHD) equations that are further used for Fourier analysis. The linearly perturbed Fourier-analyzed GRMHD equations depict the dispersion of hot plasma waves. It is found that inclusion of charge in de Sitter space greatly affects the wave dispersion. A comparison of wave properties is presented, and results reassert the presence of the Veselago medium. [ABSTRACT FROM AUTHOR]