Results 31 to 40 of about 1,367 (297)

Physical aspects of a naked singularity explosion: how does a naked singularity explode? [PDF]

open access: yesClassical and Quantum Gravity, 2001
The behaviors of quantum stress tensor for the scalar field on the classical background of spherical dust collapse is studied. In the previous works diverging flux of quantum radiation was predicted. We use the exact expressions in a 2D model formulated by Barve et al. Our present results show that the back reaction does not become important during the
Iguchi, Hideo, Harada, Tomohiro
openaire   +2 more sources

DRESSING A NAKED SINGULARITY: AN EXAMPLE [PDF]

open access: yesInternational Journal of Modern Physics D, 2010
Considering the evolution of a perfect fluid with self-similarity of the second kind, we find that an initial naked singularity can be trapped by an event horizon due to collapsing matter. The fluid moves along timelike geodesics with a self-similar parameter α = -3.
Brandt, C. F. C.   +3 more
openaire   +2 more sources

Brane cosmology and naked singularities [PDF]

open access: yesPhysics Letters B, 2001
12 ...
Brax, P., Davis, A. C.
openaire   +3 more sources

How does a naked singularity look? [PDF]

open access: yesPhysical Review D, 2003
36 pages, 9 ...
Nakao, Ken-ichi   +2 more
openaire   +2 more sources

Black tsunamis and naked singularities in AdS

open access: yesJournal of High Energy Physics, 2022
We study the evolution of the Gregory-Laflamme instability for black strings in global AdS spacetime, and investigate the CFT dual of the formation of a bulk naked singularity.
Roberto Emparan   +4 more
doaj   +1 more source

On particle collisions during gravitational collapse of Vaidya spacetimes

open access: yesPhysics of Complex Systems, 2023
The center-of-mass energy can be arbitrarily high in Schwarzschild spacetime if one considers the front collision of two particles, one of which moves along the so-called white hole geodesics and the other one along the black hole geodesic. This process
Виталий Дмитриевич Вертоградов
doaj   +1 more source

The nature of the naked singularity in generalized Vaidya spacetime and white hole geodesics

open access: yesPhysics of Complex Systems, 2021
This paper gives conditions to the energy-momentum tensor when the gravitational collapse of generalized Vaidya spacetime results in a naked singularity.
Виталий Дмитриевич Вертоградов
doaj   +1 more source

A holographic kaleidoscope for N $$ \mathcal{N} $$ = 1*

open access: yesJournal of High Energy Physics, 2019
We study in detail the recently-found family of asymptotically AdS5 × S 5 type IIB supergravity solutions dual to the N $$ \mathcal{N} $$ = 1* SYM theory with equal masses.
Nikolay Bobev   +3 more
doaj   +1 more source

CAN WE SEE NAKED SINGULARITIES? [PDF]

open access: yesInternational Journal of Modern Physics D, 2009
We study singularities which can form in a spherically symmetric gravitational collapse of a general matter field obeying weak energy condition. We show that null naked singularities that form in such a collapse can never be observed. No energy can come out of these singularities; thus they will have no physical consequences outside.
openaire   +3 more sources

Chronology protection and non-naked singularity [PDF]

open access: yesClassical and Quantum Gravity, 1998
17 pages including 3 eps figures.
Maeda, Kengo   +2 more
openaire   +3 more sources

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