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Thermodynamic Metrics and Black Hole Physics [PDF]

open access: yesEntropy, 2015
We give a brief survey of thermodynamic metrics, in particular the Hessian of the entropy function, and how they apply to black hole thermodynamics. We then provide a detailed discussion of the Gibbs surface of Kerr black holes. In particular, we analyze
Jan E. Åman   +2 more
doaj   +5 more sources

Isolated and Dynamical Horizons and Their Applications [PDF]

open access: yesLiving Reviews in Relativity, 2004
Over the past three decades, black holes have played an important role in quantum gravity, mathematical physics, numerical relativity and gravitational wave phenomenology.
Ashtekar Abhay, Krishnan Badri
doaj   +13 more sources

Braneworld black holes and entropy bounds

open access: yesPhysics Letters B, 2018
The Bousso's D-bound entropy for the various possible black hole solutions on a 4-dimensional brane is checked. It is found that the D-bound entropy here is apparently different from that of obtained for the 4-dimensional black hole solutions.
Y. Heydarzade   +3 more
doaj   +4 more sources

A simple, approximate method for analysis of Kerr-Newman black hole dynamics and thermodynamics [PDF]

open access: yesSerbian Astronomical Journal, 2009
In this work we present a simple approximate method for analysis of the basic dynamical and thermodynamical characteristics of Kerr-Newman black hole.
Panković V.   +2 more
doaj   +3 more sources

Thermalization of horizon through asymptotic symmetry in three-dimensional massive gravity

open access: yesPhysics Letters B, 2021
Recently, black hole symmetries have been studied widely and it has been speculated that this procedure will lead to the deeper understanding of the black hole physics.
M.R. Setare   +2 more
doaj   +1 more source

Bohr's Semiclassical Model of the Black Hole Thermodynamics [PDF]

open access: yesSerbian Astronomical Journal, 2008
We propose a simple procedure for evaluating the main attributes of a Schwarzschild's black hole: Bekenstein-Hawking entropy, Hawking temperature and Bekenstein's quantization of the surface area.
Panković, V.   +2 more
doaj   +3 more sources

A Detailed View of Low-frequency Quasi-periodic Oscillation in the Broadband 0.2–200 keV with Insight-HXMT and NICER

open access: yesThe Astrophysical Journal, 2023
We report the X-ray timing results of the black hole candidate MAXI J1820+070 during its 2018 outburst using the Hard X-ray Modulation Telescope (Insight-HXMT) and Neutron Star Interior Composition Explorer Mission (NICER) observations.
X. Ma   +15 more
doaj   +1 more source

UV–Optical Disk Reverberation Lags despite a Faint X-Ray Corona in the Active Galactic Nucleus Mrk 335

open access: yesThe Astrophysical Journal, 2023
 We present the first results from a 100-day Swift, NICER, and ground-based X-ray–UV–optical reverberation mapping campaign of the Narrow-line Seyfert 1 Mrk 335, when it was in an unprecedented low X-ray flux state.
Erin Kara   +39 more
doaj   +1 more source

Burns space and holography

open access: yesJournal of High Energy Physics, 2023
We elaborate on various aspects of our top-down celestial holographic duality wherein the semiclassical bulk spacetime is a 4d asymptotically flat, self-dual Kähler geometry known as Burns space.
Kevin Costello   +2 more
doaj   +1 more source

Quantum vortex instability and black hole superradiance

open access: yesPhysical Review Research, 2022
Vortices and black holes set the scene for many interesting dynamical processes in physics. Here, we study the dynamical instability of quantized vortices and rotational superradiance around rotating black holes, illustrating in the process that the same
Sam Patrick   +4 more
doaj   +1 more source

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