Results 11 to 20 of about 707,832 (374)
Dynamical ambiguities in a singular gravitational field [PDF]
Classical and Quantum Gravity, 1998 We consider particle dynamics in singular gravitational field. In 2d spacetime the system splits into two independent gravitational systems without singularity. Dynamical integrals of each system define $sl(2,R)$ algebra, but the corresponding symmetry transformations are not defined globally. Quantization leads to ambiguity.
Włodzimierz Piechocki, George Jorjadze
openaire +5 more sources
Gravitational Radiation from a Naked Singularity: Odd-Parity Perturbation [PDF]
, 1999 A naked singularity occurs in the generic collapse of an inhomogeneous dust ball. We study the even-parity mode of gravitational waves from a naked singularity of the LemaˆotreTolman-Bondi spacetime.
H. Iguchi, T. Harada, K. Nakao
semanticscholar +7 more sources
Gravitational waves around a naked singularity [PDF]
, 1998 The motion of a spherical dust cloud is described by the Lemaitre-Tolman-Bondi solution and is completely specified by initial values of distributions of the rest mass density and specific energy of the dust fluid.
H. Iguchi, K. Nakao, T. Harada
semanticscholar +4 more sources
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
doaj +4 more sources
Singularities and self-similarity in gravitational collapse
Advanced Studies in Pure Mathematics, 2009 Einstein's field equations in general relativity admit a variety of solutions with spacetime singularities. Numerical relativity has recently revealed the properties of somewhat generic spacetime singularities. It has been found that in a variety of systems self-similar solutions can describe asymptotic or intermediate behaviour of more general ...
Tomohiro Harada
openalex +6 more sources
The future of the universe in modified gravitational theories: approaching a finite-time future singularity [PDF]
, 2008 We investigate the future evolution of the dark energy universe in modified gravities, including F(R) gravity, and string-inspired scalar Gauss–Bonnet and modified Gauss–Bonnet ones, and ideal fluid with an inhomogeneous equation of state (EoS).
K. Bamba, S. Nojiri, S. Odintsov
semanticscholar +3 more sources
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. In the absence of general proof for the censorship, many examples have been proposed, in which naked singularity is the outcome of gravitational collapse. Recent development
A M Abrahams +49 more
openaire +5 more sources
Gravitation Singularities of the Caustic Type
, 1994 LaTeX Preprint MSU-TP-94 ...
G. Sardanashvily
openalex +4 more sources
Caustics type of gravitational singularities
We describe a new type of gravitational singularities which are caustics of spatial-temporal foliations. An example of gravitational wave solution forming a singularity with caustics is given.
G. A. Sardanashvily, E. G. Timoshenko
semanticscholar +4 more sources
The structure of naked singularity in self-similar gravitational collapse [PDF]
, 1992 Pankaj S. Joshi, I. H. Dwivedi
openalex +2 more sources