43 citations · 174 across the 14 of their papers we have counts for
14 papers
Tipler Naked Singularities in Dimensions
Kharanshu N. Solanki, Karim Mosani, Omkar Deshpande +1
A spacetime singularity, identified by the existence of incomplete causal geodesics in the spacetime, is called a (Tipler) strong curvature singularity if the volume form acting on…
Future-null singularity due to gravitational collapse
Ashok B. Joshi, Karim Mosani, Pankaj S. Joshi
In the case of unhindered gravitational collapse of matter cloud governed by the Lemaitre-Tolman-Bondi (LTB) spacetime, the end-state singularity is either locally visible, globall…
Regular black hole from regular initial data
Karim Mosani, Pankaj S. Joshi
Recently, there has been an interest in exploring black holes that are regular in the sense that the central curvature singularity is avoided. Here, we depict a method to obtain a…
Gravitational collapse of scalar and vector fields
Karim Mosani, Koushiki, Pankaj S. Joshi +2
We study here the unhindered gravitational collapse of spatially homogeneous (SH) scalar fields with a potential , as well as vector fields with a potenti…
Aspects of visible singularities in gravitational collapse
Karim Mosani
What happens to a massive star at the end of its life cycle is one of the most important and intriguing questions in theoretical physics. An unhindered gravitational collapse of su…
Singularity resolution in gravitational collapse
Karim Mosani, Dipanjan Dey, Kaushik Bhattacharya +1
We investigate the unhindered gravitational collapse of a homogeneous scalar field with nonzero potential, a two-dimensional analog of the Mexican hat-shaped Higgs field potential.…
On the visibility of singularities in general relativity and modified gravity theories
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi +3
We investigate the global causal structure of the end state of a spherically symmetric marginally bound Lemaitre-Tolman-Bondi (LTB) \cite{Lemaitre, Tolman, Bondi} collapsing cloud…
Causal Structure of Singularity in non-spherical Gravitational Collapse
Dipanjan Dey, Pankaj S. Joshi, Karim Mosani +1
We investigate here the final state of gravitational collapse of a non-spherical and non-marginally bound dust cloud as modeled by the Szekeres spacetime. We show that a directiona…
Globally visible singularity in an astrophysical setup
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
The global visibility of a singularity as an end state of the gravitational collapse of a spherically symmetric pressureless cloud is investigated. We show the existence of a non-z…
Strong curvature naked singularities in spherically symmetric perfect fluid collapse
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
We investigate here the locally naked singularity formed due to a spherically symmetric inhomogeneous collapsing cloud having non-zero isotropic pressure, in terms of its strength.…
Global visibility of a strong curvature singularity in nonmarginally bound dust collapse
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
We investigate here the local versus global visibility of a space-time singularity formed due to the gravitational collapse of a spherically symmetric dust cloud having a non-zero…
On viability of isentropic perfect fluid collapse with a linear equation of state
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
The gravitational collapse of a barotropic perfect fluid having the Equation of State (EoS) , where is constant, is studied here in the framework of general relativity. W…
Dynamics of General Barotropic Stellar Fluid in the Framework of Gravity
Karim Mosani, Gauranga C. Samanta
Gravitational collapse of a spherically symmetric homogeneous perfect barotropic fluid with linear as well as polytropic type Equation of State (EoS) has been investigated in the f…
Gravitational Collapse in General Relativity and in -gravity: A Comparative Study
Artyom V. Astashenok, Karim Mosani, Sergey D. Odintsov +1
We compare the gravitational collapse of homogeneous perfect fluid with various equations of state in the framework of General Relativity and in gravity. We make our calculat…