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A Toy Model for Blandford-Znajek Mechanism [PDF]
, 1999 A toy model for the Blandford-Znajek mechanism is investigated: a Kerr black hole with a toroidal electric current residing in a thin disk around the black hole.
B. Carter +23 more
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Physical Review D, 1996 One would expect spacetime to have a foam-like structure on the Planck scale with a very high topology. If spacetime is simply connected (which is assumed in this paper), the non-trivial homology occurs in dimension two, and spacetime can be regarded as being essentially the topological sum of $S^2\times S^2$ and $K3$ bubbles.
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The Astrophysical Journal Letters, 2023 The recent Chandra-JWST discovery of a quasar in the z ≈ 10.1 galaxy UHZ1 reveals that accreting supermassive black holes were already in place 470 million years after the Big Bang. The Chandra X-ray source detected in UHZ1 is a Compton-thick quasar with
Priyamvada Natarajan +5 more
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Logarithmic correction to the Bekenstein-Hawking entropy of the BTZ black hole [PDF]
, 2001 We derive an exact expression for the partition function of the Euclidean BTZ black hole. Using this, we show that for a black hole with large horizon area, the correction to the Bekenstein-Hawking entropy is $-3/2 log(Area)$, in agreement with that for ...
Banados M +13 more
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International Journal of Modern Physics D, 2003 Production of high-energy gravitational objects is a common feature of gravitational theories. The primordial universe is a natural setting for the creation of black holes and other nonperturbative gravitational entities. Cosmic black holes can be used to probe physical properties of the very early universe which would usually require the knowledge of
Ahn, Eun-Joo, Cavaglia, Marco
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Thermodynamics and phase transition of BTZ black hole in a cavity
Nuclear Physics B, 2022 In this paper, we study the thermodynamics and phase transition of a BTZ black hole in a finite space region, namely a cavity. By imposing a temperature-fixed boundary condition on the wall of the cavity and evaluating the Euclidean action, we derive the
Yuchen Huang, Jun Tao
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Shadow of a Schwarzschild black hole surrounded by a Bach-Weyl ring
, 2020 We have studied the shadows of a Schwarzschild black hole surrounded by a Bach-Weyl ring through the backward ray-tracing method. The presence of Bach-Weyl ring leads to that the photon dynamical system is non-integrable and then chaos would appear in ...
Chen, Songbai +3 more
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Nuclear Physics B, 2000 22 pages, 4 figures ...
Costa, Miguel S., Perry, Malcolm J.
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International Journal of Modern Physics D, 2021 In this paper, we consider a version of the Hayden–Preskill thought experiment in which the message thrown into the black hole is itself a smaller black hole. We then discuss the implications of the existence of a recovery channel for this black hole message at asymptotic infinity, resulting in a sharpening of the black hole information paradox for ...
Bao, Ning, Wildenhain, Elizabeth
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Ruppeiner geometry and thermodynamic phase transition of the black hole in massive gravity
European Physical Journal C: Particles and Fields, 2021 The phase transition and thermodynamic geometry of a 4-dimensional AdS topological charged black hole in de Rham, Gabadadze and Tolley (dRGT) massive gravity have been studied.
Bin Wu +3 more
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