26 citations · 65 across the 3 of their papers we have counts for
6 papers · 1 filter
High-Speed Collapse of a Hollow Sphere of Type I Matter
Zahid Ahmad, Tomohiro Harada, Ken-ichi Nakao +1
In this paper, we study the dynamics of a hollow spherical matter collapsing with very large initial velocity. The spacetime is initially very similar to the Vaidya solution, and t…
Wave Properties of Plasma Surrounding the Event Horizon of a Non-Rotating Black Hole
M. Sharif, G. Mustafa
We have studied the wave properties of the cold and isothermal plasma in the vicinity of the Schwarzschild black hole event horizon. The Fourier analyzed perturbed 3+1 GRMHD equati…
Effects of Schwarzschild Black Hole Horizon on Isothermal Plasma Wave Dispersion
M. Sharif, Umber Sheikh
The 3+1 GRMHD equations for Schwarzschild spacetime in Rindler coordinates with isothermal state of plasma are formulated. We consider the cases of non-rotating and rotating backgr…
Cold Plasma Dispersion Relations in the Vicinity of a Schwarzschild Black Hole Horizon
M. Sharif, Umber Sheikh
We apply the ADM 3+1 formalism to derive the general relativistic magnetohydrodynamic equations for cold plasma in spatially flat Schwarzschild metric. Respective perturbed equatio…
High-Speed Cylindrical Collapse of Two Perfect Fluids
M. Sharif, Zahid Ahmad
In this paper, the study of the gravitational collapse of cylindrically distributed two perfect fluid system has been carried out. It is assumed that the collapsing speeds of the t…
Teleparallel Versions of Friedmann and Lewis-Papapetrou Spacetimes
M. Sharif, M. Jamil Amir
This paper is devoted to investigate the teleparallel versions of the Friedmann models as well as the Lewis-Papapetrou solution. We obtain the tetrad and the torsion fields for bot…