Results 31 to 40 of about 5,239 (155)

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 collapse and formation of regular black holes: Dymnikova, Hayward, and beyond

European Physical Journal C: Particles and Fields
The gravitational collapse of a star can lead to the formation of a regular black hole. However, a key factor in this process is the transition of ordinary baryonic matter into a substance that forms the de Sitter core.
Vitalii Vertogradov
doaj   +1 more source

An axisymmetric gravitational collapse code [PDF]

Classical and Quantum Gravity, 2003
19 pages, 9 ...
Choptuik, Matthew W., Hirschmann, Eric W., Liebling, Steven L., Pretorius, Frans   +3 more
openaire   +3 more sources

Critical Phenomena in Gravitational Collapse

Living Reviews in Relativity, 1999
As first discovered by Choptuik, the black hole threshold in the space of initial data for general relativity shows both surprising structure and surprising simplicity.
Gundlach Carsten
doaj  

Cylindrical collapse and gravitational waves [PDF]

Classical and Quantum Gravity, 2005
We study the matching conditions for a collapsing anisotropic cylindrical perfect fluid, and we show that its radial pressure is non zero on the surface of the cylinder and proportional to the time dependent part of the field produced by the collapsing fluid.
Herrera, L., Santos, Nilton O.
openaire   +5 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

Quantum vacuum effects on the formation of black holes

Journal of High Energy Physics, 2023
We study the backreaction of quantum fields induced through the vacuum polarization and the conformal anomaly on the collapse of a thin shell of dust. It is shown that the final fate of the collapse process depends on the physical properties of the shell,
Moslem Shafiee, Yousef Bahrampour
doaj   +1 more source

Cosmological acceleration and gravitational collapse [PDF]

Journal of Cosmology and Astroparticle Physics, 2006
24 pages, 8 figures (uses iopart style/class files); new references are added; (v3) minor corrections to match published version in ...
Apostolopoulos, Pantelis S., Brouzakis, Nikolaos, Tetradis, Nikolaos, Tzavara, Eleftheria   +3 more
openaire   +2 more sources

Spinning into the Gap: Direct-horizon Collapse as the Origin of GW231123 from End-to-end General-relativistic Magnetohydrodynamic Simulations

The Astrophysical Journal Letters
GW231123, the most massive binary black hole (BH) merger observed to date, involves component BHs with masses inside the pair-instability mass gap and unusually high spins.
Ore Gottlieb, Brian D. Metzger, Danat Issa, Sean E. Li, Mathieu Renzo, Maximiliano Isi   +5 more
doaj   +1 more source

Charged anisotropic spherical collapse with heat flow

European Physical Journal C: Particles and Fields, 2021
In this article, we study the shear-free gravitational collapse of a charged radiating star. The Einstein field equations of gravitational collapse for the charged stars are known to give rise to a high degree of non-linearity in the ordinary ...
Kali Charan, Om Prakash Yadav, B. C. Tewari   +2 more
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