Results 101 to 110 of about 51,175 (198)
Brane-world stars with solid crust and vacuum exterior
, 2014 The minimal geometric deformation approach is employed to show the existence of brane-world stellar distributions with vacuum Schwarzschild exterior, thus without energy leaking from the exterior of the brane-world star into the extra dimension.
Casadio, Roberto +2 more
core +1 more source
Physics Letters BA maximun acceleration analysis by Pati dating back to 1992 is here improved by replacing the traditional Heisenberg Uncertainty Principle (HUP) with the Generalized Uncertainty Principle (GUP), which predicts the existence of a minimum length in Nature.
Christian Corda +2 more
doaj +1 more source
Accretion onto a noncommutative geometry inspired black hole
European Physical Journal C: Particles and Fields, 2017 The spherically symmetric accretion onto a noncommutative (NC) inspired Schwarzschild black hole is treated for a polytropic fluid. The critical accretion rate $$\dot{M}$$ M ˙ , sonic speed $$a_s$$ a s and other flow parameters are generalized for the NC
Rahul Kumar, Sushant G. Ghosh
doaj +1 more source
Wattanakul Radius = Schwarzschild Radius: A New Definition of Black Hole Radius
General Relativity (GR) has profoundly shaped our understanding of gravity and the cosmos, yet it grapples with a persistent enigma: the concept of "singularity" at the heart of black holes or at the Big Bang's origin. This point of infinite density and gravity often signals a breakdown in our current physics, suggesting that a more complete and ...
openaire +2 more sources
Whether the singularities are removable in some metrics
Examples and CounterexamplesFor a long time, the singularities in certain metrics have been problematic and must be removed to avoid unreasonable results in spacetime. Therefore, some new metrics were proposed to eliminate these singularities through coordinate transformations, but
Ting-Han Pei
doaj +1 more source
Spectroscopy inside the Schwarzschild radius
Perhaps one of the most intriguing pursuits in the physical sciences is the search for a way to unify the predictions of quantum mechanics and relativity. Nowhere is this need more evident than when a massive body occupies an increasingly small volume, forming a singularity surrounded by an event horizon.
openaire +1 more source
Quasinormal modes of Schwarzschild black holes in the Dehnen-(1, 4, 5/2) type dark matter halos
European Physical Journal C: Particles and FieldsThe Dehnen-type dark matter density distribution model is mainly used for dwarf galaxies. In recent years, researchers have speculated that black holes may exist in this dark matter model and have given the black hole metric solutions.
Qi-Qi Liang, Dong Liu, Zheng-Wen Long
doaj +1 more source
Astronomy & AstrophysicsContext. In this manuscript, we analyze the effect of Schwarzschild space-time curvature on the Faraday rotation of quasi-monochromatic circularly polarized electromagnetic waves. Aims.
Asenjo Felipe A. +3 more
doaj +1 more source
Pseudo-Newtonian Simulation of a Thin Accretion Disk Around a Reissner–Nordström Naked Singularity
The Astrophysical JournalWe present the first numerical simulations of a thin accretion disk around a Reissner–Nordström (RN) naked singularity (NkS; a charged point mass). The gravity of the RN NkS is modeled with a pseudo-Newtonian potential that reproduces exactly the radial ...
Miljenko Čemeljić +3 more
doaj +1 more source
Radiative properties of a nonsingular black hole: Hawking radiation and gray-body factor
Journal of High Energy PhysicsWe study the radiative properties of a spherical and singularity-free black-hole geometry recently proposed in the literature. Contrary to the Schwarzschild spacetime, this geometry is geodesically complete and regular, and, instead of the singularity ...
Asier Alonso-Bardaji +2 more
doaj +1 more source