An analysis of wave properties of isothermal plasma around Reissner-Nordström black hole

2009 ◽  
Vol 323 (3) ◽  
pp. 243-259 ◽  
Author(s):  
M. Khayrul Hasan ◽  
M. Hossain Ali
Keyword(s):  
Black Hole ◽  
Isothermal Plasma ◽  
Wave Properties

scholarly journals Wave properties of plasma surrounding the event horizon of a nonrotating black hole

2008 ◽  
Vol 86 (11) ◽  
pp. 1265-1285 ◽  
Author(s):  
M Sharif ◽  
G Mustafa
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Schwarzschild Black Hole ◽  
Magnetohydrodynamics Equations ◽  
Normal Dispersion ◽  
Isothermal Plasma ◽  
General Relativistic ◽  
Relativistic Magnetohydrodynamics ◽  
Wave Properties ◽  
Complex Dispersion

We study the wave properties of a cold isothermal plasma in the vicinity of a Schwarzschild black-hole event horizon. The Fourier-analyzed perturbed 3+1 general relativistic magnetohydrodynamics equations are examined such that the complex dispersion relations are obtained for nonrotating, rotating nonmagnetized, and rotating magnetized backgrounds. The propagation and attenuation vectors along with the refractive index are obtained (shown graphically) to study the dispersive properties of the medium near the event horizon. The results show that no information can be obtained from the Schwarzschild magnetosphere. Further, the pressure stops the existence of normal dispersion of waves.PACS Nos.: 95.30.Sf, 95.30.Qd, 04.30.Nk

scholarly journals Wave properties of isothermal magneto-rotational fluids

2009 ◽  
Vol 87 (8) ◽  
pp. 879-894 ◽  
Author(s):  
M. Sharif ◽  
Umber Sheikh
Keyword(s):  
Black Hole ◽  
Kerr Black Hole ◽  
Production Region ◽  
Complex Wave ◽  
Isothermal Plasma ◽  
Veselago Medium ◽  
General Relativistic ◽  
Phase And Group Velocities ◽  
Wave Properties ◽  
Group Velocities

In this paper, the isothermal plasma-wave properties in the neighborhood of the pair-production region for the Kerr black-hole magnetosphere are discussed. We consider the Fourier-analyzed form of the perturbed general relativistic magnetohydrodynamical equations whose determinant leads to a dispersion relation. For the special scenario, the x-components of the complex wave vectors are calculated numerically. Respective components of the propagation vector, attenuation vector, phase and group velocities are shown in graphs. We have investigated, in particular, the existence of a Veselago medium and wave behavior (modes of waves dispersion).

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