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The nature of gravitational singularities [PDF]
International Journal of Modern Physics D, 2004 The nature of gravitational singularities, long mysterious, has now become clear through a combination of mathematical and numerical analysis. As the singularity is approached, the time derivative terms in the field equations dominate, and the ...
Berger B., DAVID GARFINKLE, Uggla C.
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Singularity resolution in gravitational collapse [PDF]
Physical Review D, 2022 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. The collapsing scalar field is surrounded by an exterior retarded (outgoing) generalized Vaidya spacetime. We prove that the density dependence on the scale factor cannot be
Karim Mosani +3 more
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Gravitational Radiation from Cylindrical Naked Singularity [PDF]
, 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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European Physical Journal C: Particles and Fields, 2017 We solve a $$1+5$$ 1 + 5 -dimensional cylindrical gravitational-wave solution of the Einstein equation, in which there are two curvature singularities. Then we show that one of the curvature singularities can be removed by an extension of the spacetime ...
Yu-Zhu Chen, Wen-Du Li, Wu-Sheng Dai
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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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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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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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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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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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Twisted and Singular Gravitating Vortices [PDF]
The Journal of Geometric Analysis, 2021 1 ...
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