Results 31 to 40 of about 62,947 (343)
Singularities in Gravitational Collapse with Radial Pressure [PDF]
General Relativity and Gravitation, 2001 We analyze spherical dust collapse with non-vanishing radial pressure, $ $, and vanishing tangential stresses. Considering a barotropic equation of state, $ = $, we obtain an analytical solution in closed form---which is exact for $ =-1,0$, and approximate otherwise---near the center of symmetry (where the curvature singularity forms).
Gonçalves, Sérgio M. C. V. +1 more
openaire +3 more sources
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
doaj +1 more source
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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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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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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Can a false vacuum bubble remove the singularity inside a black hole?
European Physical Journal C: Particles and Fields, 2020 We investigate a regular black hole model with a de Sitter-like core at its center. This type of a black hole model with a false vacuum core was introduced with the hope of singularity-resolution and is a common feature shared by many regular black holes.
Suddhasattwa Brahma, Dong-han Yeom
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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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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.
openaire +3 more sources
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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Does a primary hair have an impact on the naked singularity formation in hairy Vaidya spacetime?
Physics of Complex SystemsWe consider the gravitational collapse of Vaidya spacetime, which has been obtained using the gravitational decoupling method. In this paper, we are interested in whether a primary hair has any impact on the endstate of the gravitational collapse.
Виталий Дмитриевич Вертоградов
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