2 citations · 2 across the 1 of their papers we have counts for
8 papers
On the existence of marginally trapped tubes in spacetimes with local rotational symmetry
Abbas Sherif
Let be a locally rotationally symmetric spacetime with at least one of the rotation or spatial twist being non-zero. It is proved that cannot admit a non-minimal marginally…
On homothetic Killing vectors in stationary axisymmetric vacuum spacetimes
Abbas M. Sherif, Peter K. S. Dunsby, Rituparno Goswami +1
In this paper we consider homothetic Killing vectors in the class of stationary axisymmetric vacuum (SAV) spacetimes, where the components of the vectors are functions of the time…
Geometric properties of a certain class of compact dynamical horizons in locally rotationally symmetric class II spacetimes
Abbas M. Sherif, Peter K. S. Dunsby
In this paper we study the geometry of a certain class of compact dynamical horizons with a time-dependent induced metric in locally rotationally symmetric class II spacetimes. We…
Non-existence of expansion-free dynamical stars with rotation and spatial twist
Abbas Sherif, Rituparno Goswami, Sunil D. Maharaj
Extending a previous work by the same authors, we investigate the existence of expansion-free dynamical stars with non-zero spatial twist and rotation and show that such stars cann…
On Properties of Expansion-free Dynamical Stars
Abbas Sherif, Rituparno Goswami, Sunil D. Maharaj
We study the geometrical and dynamical features of expansion-free dynamical stars in general relativity. Such stars can exist only if particular physical and geometric conditions a…
Some Result on Cosmological and Astrophysical Horizons and Trapped Surfaces
Abbas Sherif, Rituparno Goswami, Sunil Maharaj
We study the evolution of horizons of black holes in the covariant setting and investigate various properties intrinsic to the geometry of the foliation surfaces of these h…