[72] Dymnikova I. J. Lett. nonsingular black hole is analogus to Russian nesting dolls. The topic is also known as: nonsingular black hole model. Testing Astrophysical Models of the Galactic Center Black Hole Astrophys. [11], Avoiding paradoxes in the standard black hole model. NON-SINGULAR BLACK-HOLES ON THE BRANE - World Scientific Approaches to the development of the theory of the origin of black holes, Observation of Incipient Black Holes and the Information Loss Problem, Ergoregion instability rules out black hole doubles. I was the one who wrote the little paragraph about "Alternative black hole models" and I would like to tell you a little bit more about the models of the scientist negating the existence of black holes. Grav. Avoiding paradoxes in the standard black hole model, "Witnessing matter falling into a black hole by a distant observer", Black holes don't exist, Case physicists report, Magnetospheric eternally collapsing object, https://infogalactic.com/w/index.php?title=Nonsingular_black_hole_models&oldid=704978721, Last edited on 14 February 2016, at 19:11, Creative Commons Attribution-ShareAlike License. This space-like defect is located inside o [10] Nowadays, it is known that the Ayn-BeatoGarca model may mimic the absorption properties of the ReissnerNordstrm metric, from the perspective of the absorption of massless test scalar fields. See the quiz! Contents. [8] The model was proposed by Eloy Ayn Beato and Alberto Garca in 1998 based on the minimal coupling between a nonlinear electrodynamics model and general relativity, considering a static and spherically symmetric spacetime. Download Unionpedia on your Android device! [citation needed] Today some of the most viable candidates for the result of the collapse of a star with mass well above the Chandrasekhar limit include the gravastar and the dark energy star. A nonsingular black hole model is a mathematical theory of black holes that avoids certain theoretical problems with the standard black hole model, including information loss and the unobservable nature of the black hole event horizon. 1974 Stephen Hawking applies quantum field theory to black . This requires an accurate theory of black hole formation, of which several have been proposed. Preceding unsigned comment added by 212.201.71.52 (talk) 21:53, 16 February 2008 (UTC). "Non-singular general relativistic gravitational collapse". The basic model of a black hole can be summed up as follows: gravity wins. Such research has attracted much media attention,[5] as black holes have long captured the imagination of both scientists and the public for both their innate simplicity and mysteriousness. Nonsingular Black Hole | Papers With Code The answer to your first question is what you've written: there is an equivalence of categories $$\{\textrm{f.g. field extensions }K/k\textrm{ with }\operatorname{trdeg}_k K = 1\}\simeq\{\textrm{nonsingular projective curves }C/k\}$$ (see theorem 50.2.6 here).When people use the description of an affine curve to refer to a nonsingular projective curve, they typically mean "the nonsingular . The top 4 are: black holes, black hole information paradox, gravastar and event horizon.You can get the definition(s) of a word in the list below by tapping the question-mark icon next to it. Nonsingular black hole models have been proposed since theoretical problems with black holes were first realized. We describe a possible generalization of a non-singular black-hole metric to the case when this equality is violated. Noncommutative nonsingular black holes NYU Scholars Resisting collapse: How matter inside a black hole can withstand The recent theoretical results have therefore undergone much scrutiny and most of them are now ruled out by theoretical studies. This requires the development of an accurate theory of the formation of black holes; some of these solutions have been proposed. For a black hole to physically exist as a solution to Einstein's equation, it must form an event horizon in finite time relative to outside observers. Effective models of nonsingular quantum black holes - NASA/ADS Today some of the most viable candidates for the end result of the collapse of a star with mass well above the Chandrasekhar limit include the gravastar and the dark energy star. In order for a black hole, as a solution of Einstein's equations , to really exist, it must form an event horizon in a time finite for an external observer. This requires an accurate theory of black hole formation, of which several have been proposed. In addition, the nonsingular black hole (14) is a novel class of regular black hole, unlike the Bardeen and Hayward regular black holes, has an asymptotically Minkowski core [45]. The metric is not derived from any particular alternative theory of gravity, but provides a framework to test the formation and evaporation of non-singular black holes both . In higher dimensions this is no longer true : varieties can have many different nonsingular projective models. Try Combster now! We also obtain a metric for a charged nonsingular black hole obeying similar restrictions as the neutral one and construct higher dimensional models of neutral and charged black holes. [citation needed] Today some of the most viable candidates for the result of the collapse of a star with mass well above the Chandrasekhar limit include the gravastar and the dark energy star. In other words, a falling object causes an expansion of the event horizon of the black hole, which occurs only after the object fell into the black hole, which allows observing the event horizon at a finite time [1] [2] . We obtain exact solutions to the field equations for five-dimensional locally rotationally symmetric (LRS) Bianchi type-I spacetime in the f(R,T) theory of gravity, where specifically, the following three cases are considered: (i) f(R,T)=(R+T), (ii) f(R,T)=R . Zhang, Shuang Nan; Liu, Yuan (2008). Black hole cosmology - Wikipedia The question of the existence of black holes described by nonsingular models remains open. While black holes were a well-established part of mainstream physics for most of the end of the 20th century, alternative models received new attention when models proposed by George Chapline and later by Lawrence Krauss, Dejan Stojkovic, and Tanmay Vachaspati of Case Western Reserve University showed in several separate models that black hole horizons could not form.[3][4]. At present, several models have been developed to describe the collapse of stars with a mass significantly exceeding the Chandrasekhar limit, including a gravastar and a dark energy star.. . For a black hole to physically exist as a solution to Einstein's equation, it must form an event horizon in finite time relative to outside observers. In other words, an infalling object causes the horizon of a black hole to expand, which only occurs after the object has fallen into the hole, allowing an observable horizon in finite time. Later the same authors reinterpreted the first non-singular black hole geometry, the Bardeen toy Model,[9] as a nonlinear-electrodynamics-based regular black hole. Non-Singular Black Holes | by Brian Koberlein In other words, an infalling object causes the horizon of a black hole to expand, which only occurs after the object has fallen into the hole, allowing an observable horizon in finite time. ably similar to the Schwarzschild solution of general relativ- have black hole solutions ~solutions with event horizons!. Nonsingular black hole model as a possible end product of gravitational Hours of Admissions. [10] Nowadays, it is known that the Ayn-BeatoGarca model may mimic the absorption properties of the ReissnerNordstrm metric, from the perspective of the absorption of massless test scalar fields. SamuelRiv 19:17, 3 November 2007 (UTC). There is as of today no physical theory which forecast such a phase-transition. Nonsingular projective curve model corresponding to $y^2 = x^4+1$ These results also attracted media attention [5] , since the issue of black holes has long been popular with the public. The Reissner-Nordstrom solution on the brane was obtained by Dadhich et al. . [7], The Ayn-BeatoGarca model is the first exact charged regular black hole with a source. The words at the top of the list are the ones most associated with nonsingular black hole . Correspondence between phases of black membranes wrapped on a two-torus of side L (left) and quickly-rotating MP black holes with rotation parameter a L r 0 (right: must be rotated along a vertical axis): (i) uniform black membrane and MP black hole; (ii) nonuniform black membrane and pinched black hole; (iii) pinched-off membrane and . The Hayward metric is the simplest description of a black hole that is non-singular. Astronomy:Nonsingular black hole models - HandWiki What do Nonsingular black hole models and Outline of There is an explanation why the Krauss model is wrong.The simply reason why these models are not ruled out by other is that one does't take them serious except some persons who have no idea of GR, too. Nonsingular black hole models have been proposed since theoretical problems with black holes were first realized. Nonsingular models of black holes Exploring nonsingular black holes in gravitational perturbations Signatures of regular black holes from the shadow of Sgr A* and M87* This page was created based on discussions from Black_hole#Alternative_models on Talk:Black hole. Below is a list of nonsingular black hole models words - that is, words related to nonsingular black hole models. [11], Avoiding paradoxes in the standard black hole model, "Witnessing matter falling into a black hole by a distant observer", "The Bardeen model as a nonlinear magnetic monopole", Black holes don't exist, Case physicists report, Magnetospheric eternally collapsing object, https://en.wikipedia.org/w/index.php?title=Nonsingular_black_hole_models&oldid=1118967044, Articles with dead external links from January 2018, Articles with permanently dead external links, Articles with unsourced statements from March 2008, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 30 October 2022, at 00:56. A nonsingular rotating black hole | SpringerLink Regular black hole model no longer true: varieties can have many different nonsingular projective models 19:17 3. ) 21:53, 16 February 2008 ( UTC ) nonsingular black hole models Dadhich et al the standard black models! Words - that is non-singular 3 November 2007 ( UTC ) Galactic Center black hole with a source, Nan... 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