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Browsing by Subject "naked singularity"

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All black holes in Lemaˆıtre-Tolman-Bondi inhomogeneous dust collapse

Joshi, Pankaj S.; Malafarina, D. (2015-09-08)

Within the Lemaˆıtre-Tolman-Bondi formalism for gravitational collapse of inhomogeneous dust we analyze the parameter space that leads to the formation of a globally covered singularity (i.e. a black hole) when some ...
Equilibrium configurations from gravitational collapse

Joshi, Pankaj S.; Narayan, Ramesh; Malafarina, D. (2011-11-18)

We develop here a new procedure within Einstein’s theory of gravity to generate equilibrium configurations that result as the final state of gravitational collapse from regular initial conditions. As a simplification, we ...
Genericity aspects in gravitational collapse to black holes and naked singularities

Joshi, Pankaj S.; Malafarina, D.; Saraykar, Ravindra V. (2012-07-04)

We investigate here the genericity and stability aspects for naked singularities and black holes that arise as the final states for a complete gravitational collapse of a spherical massive matter cloud. The form of the ...
Gravitational collapse with tangential pressure

Malafarina, D.; Joshi, Pankaj S. (2011-05-06)

Using the general formalism for spherical gravitational collapse developed in [1], we investigate here the final fate of a spherical distribution of a matter cloud, where radial pressures vanish but tangential pressures ...
Instability of black hole formation under small pressure perturbations

Joshi, Pankaj S.; Malafarina, D. (2012-11-14)

We investigate here the spectrum of gravitational collapse endstates when arbitrarily small perfect fluid pressures are introduced in the classic black hole formation scenario as described by Oppenheimer, Snyder and Datt ...
Singularity avoidance in quantum-inspired inhomogeneous dust collapse

Liu, Yue; Malafarina, D.; Modesto, Leonardo; Bambi, Cosimo (2014-08-17)

In a previous paper, some of us studied general relativistic homogeneous gravitational collapses for dust and radiation, in which the density profile was replaced by an effective density justified by some quantum gravity ...
The instability of black hole formation in gravitational collapse

Joshi, Pankaj S.; Malafarina, D. (2011-01-11)

We consider here the classic scenario given by Oppenheimer, Snyder, and Datt, for the gravitational collapse of a massive matter cloud, and examine its stability under the introduction of small tangential stresses. We show, ...
Thermodynamics and gravitational collapse

Malafarina, D.; Joshi, Pankaj S. (2011-06-19)

It is known now that a typical gravitational collapse in general relativity, evolving from regular initial data and under physically reasonable conditions would end in either a black hole or a naked singularity final state. ...