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Gravitationally collapsing stars in f(R) gravity
European Physical Journal C: Particles and Fields, 2021 The gravitational dynamics of a collapsing matter configuration which is simultaneously radiating heat flux is studied in f(R) gravity. Three particular functional forms in f(R) gravity are considered to show that it is possible to envisage boundary ...
Suresh C. Jaryal, Ayan Chatterjee
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Averaged energy conditions for vector fields
Physics Letters B, 2023 In this work we shall obtain sufficient conditions for the appearance of singularities in gravitational theories which propagate an extra vector degree of freedom, based on the known relaxations of the singularity theorems.
Francisco José Maldonado Torralba
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Physical Processes in Naked Singularity Formation [PDF]
, 2002 Gravitational collapse is one of the most fruitful subjects in gravitational physics. It is well known that singularity formation is inevitable in complete gravitational collapse. It was conjectured that such a singularity should be hidden by horizons if
Chandrasekhar +7 more
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Gravitational lensing by rotating naked singularities [PDF]
Physical Review D, 2008 35 pages, 30 ...
Gyulchev, Galin N. +1 more
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Newtonian Analysis of Gravitational Waves from Naked Singularity [PDF]
, 2000 Spherical dust collapse generally forms a shell focusing naked singularity at the symmetric center. This naked singularity is massless. Further the Newtonian gravitational potential and speed of the dust fluid elements are everywhere much smaller than ...
A. Ori +34 more
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Exact gravitational plane waves and two-dimensional gravity
Physics Letters B, 2018 We discuss dynamical aspects of gravitational plane waves in Einstein theory with massless scalar fields. The general analytic solution describes colliding gravitational waves with constant polarization, which interact with scalar waves and, for generic ...
Jorge G. Russo
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Gravitational Radiation from a Naked Singularity -- Odd-Parity Perturbation -- [PDF]
, 1999 It has been suggested that a naked singularity may be a good candidate for a strong gravitational wave burster. The naked singularity occurs in the generic collapse of an inhomogeneous dust ball.
Chandrasekhar +4 more
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Resolving Gravitational Singularities [PDF]
, 2008 We review recent progress on the resolution of gravitational singularities in string theory. The main example is the fundamental string in five dimensions which is singular in the standard supergravity description but regular after taking into account higher derivative corrections determined by anomalies and supersymmetry.
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Light trajectory and shadow shape in the rotating naked singularity
European Physical Journal C: Particles and Fields, 2022 In this paper, we investigate the light trajectories and shadow properties in the rotating version of null naked singularity (NNS) spacetime which is derived using the Newman–Janis algorithm without complexification method.
Vishva Patel +4 more
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Gravitational Waves around a Naked Singularity -- Odd-Parity Perturbation of Lemaitre-Tolman-Bondi Space-Time -- [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.
A. Ori +32 more
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