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Axially Symmetric Null Dust Space-Time, Naked Singularity, and Cosmic Time Machine [PDF]
Advances in High Energy Physics, 2017 We present a gravitational collapse null dust solution of the Einstein field equations. The space-time is regular everywhere except on the symmetry axis where it possesses a naked curvature singularity and admits one parameter isometry group, a generator
Faizuddin Ahmed
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Gravitational Radiation from Cylindrical Naked Singularity [PDF]
Physical Review D, 2005 We construct an approximate solution which describes the gravitational emission from a naked singularity formed by the gravitational collapse of a cylindrical thick shell composed of dust. The assumed situation is that the collapsing speed of the dust is
C. Cutler +13 more
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Dynamical Ambiguities in Singular Gravitational Field [PDF]
Classical and Quantum Gravity, 1997 We consider particle dynamics in singular gravitational field. In 2d spacetime the system splits into two independent gravitational systems without singularity.
George Jorjadze +7 more
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Conformal structure of singularities in some varying fundamental constants bimetric cosmologies [PDF]
Scientific ReportsIn this paper, we explore the conformal structure of singularities arising from varying fundamental constants using the method of Penrose diagrams. We employ a specific type of bimetric model featuring two different metrics.
Konrad Marosek, Adam Balcerzak
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Gravity with perimeter action and gravitational singularities
Physics Letters B, 2021 16 pages, 3 figures, the references and an extended note are ...
George Savvidy
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Asymptotic safety, singularities, and gravitational collapse
Physics Letters B, 2010 Asymptotic safety (an ultraviolet fixed point with finite-dimensional critical surface) offers the possibility that a predictive theory of quantum gravity can be obtained from the quantization of classical general relativity. However, it is unclear what becomes of the singularities of classical general relativity, which, it is hoped, might be resolved ...
Roberto Casadio +2 more
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Singularities in Gravitational Collapse with Radial Pressure [PDF]
General Relativity and Gravitation, 2001 We analyze spherical dust collapse with non-vanishing radial pressure, $ $, and vanishing tangential stresses. Considering a barotropic equation of state, $ = $, we obtain an analytical solution in closed form---which is exact for $ =-1,0$, and approximate otherwise---near the center of symmetry (where the curvature singularity forms).
Sérgio M. C. V. Gonçalves +1 more
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Gravitational collapse and naked singularities [PDF]
Pramana, 2004 Gravitational collapse is one of the most striking phenomena in gravitational physics. The cosmic censorship conjecture has provided strong motivation for researches in this field.
A M Abrahams +49 more
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Twisted and Singular Gravitating Vortices [PDF]
The Journal of Geometric Analysis, 2021 1 ...
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Finding singularities in gravitational lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT The number of strong lens systems is expected to increase significantly in ongoing and upcoming surveys. With an increase in the total number of such systems, we expect to discover many configurations that correspond to unstable caustics. In such cases, the instability can be used to our advantage for constraining the lens model.
Ashish Kumar Meena, J S Bagla
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