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Gravitational Collapse and Singularity Removal in Rastall Theory
Advances in High Energy Physics, 2021 In the present work, we study spherically symmetric gravitational collapse of a homogeneous fluid in the framework of Rastall gravity. Considering a nonlinear equation of state (EoS) for the fluid profiles, we search for a class of nonsingular collapse ...
Ehsan Dorrani
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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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Quantum backreaction on chronology horizons
Journal of High Energy Physics, 2022 We extend in two directions our recent investigation of strongly interacting quantum fields in a class of spacetimes with chronology horizons (Misner spacetimes).
Roberto Emparan, Marija Tomašević
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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 singularity behaves locally like a homogeneous oscillatory spacetime.
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NAKED SINGULARITIES IN HIGHER DIMENSIONAL GRAVITATIONAL COLLAPSE [PDF]
International Journal of Modern Physics D, 2003 Spherically symmetric inhomogeneous dust collapse has been studied in higher dimensional space–time and the factors responsible for the appearance of a naked singularity are analyzed in the region close to the centre for the marginally bound case. It is clearly demonstrated that in the former case naked singularities do not appear in the space–time ...
Banerjee, Asit +2 more
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Solving the Hierarchy Problem with Noncompact Extra Dimensions [PDF]
, 1999 We show that gravitational effects of global cosmic 3-branes can be responsible for compactification from six to four space-time dimensions, naturally producing the observed hierarchy between electroweak and gravitational forces. The finite radius of the
Andrew G. Cohen +16 more
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The spectrum of endstates of gravitational collapse with tangential stresses [PDF]
, 2001 The final state--black hole or naked singularity--of the gravitational collapse of a marginally bound matter configuration in the presence of tangential stresses is classified, in full generality, in terms of the initial data and equation of state.
A. Ori +21 more
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Singularity resolution in gravitational collapse
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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Non-linear instability of Kerr-type Cauchy horizons [PDF]
, 1995 Using the general solution to the Einstein equations on intersecting null surfaces developed by Hayward, we investigate the non-linear instability of the Cauchy horizon inside a realistic black hole.
A. Bonanno +26 more
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The Central Singularity in Spherical Collapse [PDF]
, 2000 The gravitational strength of the central singularity in spherically symmetric space-times is investigated. Necessary conditions for the singularity to be gravitationally weak are derived and it is shown that these are violated in a wide variety of ...
A. Krasiński +22 more
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