4 papers
Obstructions to global visibility of singularities in asymptotically flat spacetimes
Kanabar Jay, Kharanshu N. Solanki, Pankaj S. Joshi
Consider an -dimensional asymptotically flat spacetime and a future-directed, affinely parametrized outgoing null generator of an achronal boundary $\partial J^+(S_\vare…
Universality and Criticality in Mass-less Scalar Field Collapse
Koushiki, Rituparno Goswami, Pankaj S. Joshi
In this paper, we observe the collapse of a mass-less scalar field covariantly. We show that the strengths of the collapsing and dispersing modes of this scalar field will decide w…
Apparent horizon and causal structure of spacetime singularities
Koushiki, Pankaj S. Joshi
A major issue in general relativity and blackhole physics today is to determine the conditions when the spacetime singularities forming as end-states of gravitational collapse are…
On Formation of Primordial Naked Singularities
Koushiki, Pankaj S. Joshi, Sudip Bhattacharyya
The density fluctuations in the nearly homogeneous background in the very early universe are argued to be the origin of the cosmic structures we observe in our present universe. Al…