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Gravitational radiation from a 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
Ken-ichi Nakao, Yoshiyuki Morisawa
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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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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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Effects of a Late Gravitational Transition on Gravitational Waves and Anticipated Constraints
Universe, 2023 We investigate the evolution of gravitational waves through discontinuous evolution (transition) of the Hubble expansion rate H(z) at a sudden cosmological singularity, which may be due to a transition of the value of the gravitational constant.
Evangelos Achilleas Paraskevas +1 more
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Causal structure of singularity in non-spherical gravitational collapse
European Physical Journal C: Particles and Fields, 2022 We investigate here the final state of gravitational collapse of a non-spherical and non-marginally bound dust cloud as modeled by the Szekeres spacetime.
Dipanjan Dey +3 more
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Quantum dynamics corresponding to the chaotic BKL scenario
European Physical Journal C: Particles and Fields, 2023 We quantize the solution to the Belinski– Khalatnikov–Lifshitz (BKL) scenario using the integral quantization method. Quantization smears the gravitational singularity, preventing its localization in the configuration space.
Andrzej Góźdź +2 more
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Gravitational field of slightly deformed naked singularities
European Physical Journal C: Particles and Fields, 2022 We derive a particular approximate solution of Einstein equations, describing the gravitational field of a mass distribution that slightly deviates from spherical symmetry. The deviation is described by means of a quadrupole parameter that is responsible
Saken Toktarbay +3 more
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The nature of the naked singularity in generalized Vaidya spacetime and white hole geodesics
Physics 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
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Cosmology from Newton–Chern–Simons gravity
Nuclear Physics B, 2020 We study a five-dimensional non-relativistic gravity theory whose action is composed of a gravitational sector and a sector of matter where the gravitational sector is given by the so called Newton–Chern–Simons gravity and where the matter sector is ...
S. Lepe, G. Rubio, P. Salgado
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