Results 41 to 50 of about 63,762 (335)

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
doaj   +1 more source

Does a primary hair have an impact on the naked singularity formation in hairy Vaidya spacetime?

Physics of Complex Systems
We 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
doaj   +1 more source

Gravitational duals to the grand canonical ensemble abhor Cauchy horizons

Journal of High Energy Physics, 2020
The gravitational dual to the grand canonical ensemble of a large N holographic theory is a charged black hole. These spacetimes — for example Reissner- Nordström-AdS — can have Cauchy horizons that render the classical gravitational dynamics of the ...
Sean A. Hartnoll, Gary T. Horowitz, Jorrit Kruthoff, Jorge E. Santos   +3 more
doaj   +1 more source

Big bang of the brane universe [PDF]

, 2001
Big bang of the Friedmann-Robertson-Walker (FRW)-brane universe is studied. In contrast to the spacelike initial singularity of the usual FRW universe, the initial singularity of the FRW-brane universe is point-like from the viewpoint of causality ...
A. Lukas, A. Lukas, A. Lukas, C. Csáki, D. Ida, D. Lynden-Bell, D.J.H. Chung, E.J. Squires, G.W. Gibbons, H. Ishihara, Hideki Ishihara, J. Garriga, J. Rosen, J.M. Cline, L. Randall, M. Gogberashvili, M. Gogberashvili, M. Visser, P. Binétruy, P. Binétruy, P. Horava, T. Shiromizu, V.A. Rubakov, W. Israel   +23 more
core   +3 more sources

Regular Black Holes (RBHs): A Non-Singular Alternative to Classical Black Holes with Structural Validation and Thermodynamic Considerations via Gravitational Thermodynamics Approach

SATO, DAISUKE
  +9 more sources

Matter and gravitons in the gravitational collapse

Physics Letters B, 2016
We consider the effects of gravitons in the collapse of baryonic matter that forms a black hole. We first note that the effective number of (soft off-shell) gravitons that account for the (negative) Newtonian potential energy generated by the baryons is ...
Roberto Casadio, Andrea Giugno, Andrea Giusti   +2 more
doaj   +1 more source

Anisotropic Multiverse with Varying c and G and Study of Its Thermodynamics

Universe, 2022
We assume the anisotropic model of the Universe in the framework of a varying speed of light c and a varying gravitational constant G theories and study different types of singularities.
Ujjal Debnath, Soumak Nag
doaj   +1 more source

Instability of black hole formation under small pressure perturbations [PDF]

, 2012
We investigate here the spectrum of gravitational collapse endstates when arbitrarily small perfect fluid pressures are introduced in the classic black hole formation scenario as described by Oppenheimer, Snyder and Datt (OSD) [1].
A Ori, A Ori, A Ori, B Waugh, C Gundlach, D Christodoulou, Daniele Malafarina, DM Eardley, E Sorkin, G Magli, G Magli, H Bondi, I Bombaci, JF Villas da Rocha, JR Oppenheimer, JR Oppenheimer, M Patil, M Patil, MW Choptuik, MW Choptuik, Pankaj S. Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, PS Joshi, R Giambo, R Giambó, R Giambó, R Goswami, R Penrose, RC Tolman, RPAC Newman, S Datt, SE Woosley, SG Ghosh, SMCV Goncalves, T Foglizzo, T Harada, T Harada, T Harada   +44 more
core   +3 more sources

Classical and quantum equations of motion of an n-dimensional BTZ black hole

Physics Letters B, 2016
We investigate the gravitational collapse of a non-rotating n-dimensional BTZ black hole in AdS space in the context of both classical and quantum mechanics.
Eric Greenwood
doaj   +1 more source

Gravitational Radiation from a Naked Singularity. II - Even-Parity Perturbation -

, 2000
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 Lema\^{\i}tre-Tolman-Bondi spacetime.
Chandrasekhar, H. Iguchi, Hawking, Hawking, K.-i. Nakao, T. Harada, Tolman   +6 more
core   +1 more source