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Black Hole Thermodynamics without a Black Hole? [PDF]
Nuclear Physics B, 2003 In the present paper we consider, using our earlier results, the process of quantum gravitational collapse and argue that there exists the final quantum state when the collapse stops.
Anderson +37 more
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Bridging Scales in Black Hole Accretion and Feedback: Magnetized Bondi Accretion in 3D GRMHD
The Astrophysical Journal Letters, 2023 Fueling and feedback couple supermassive black holes (SMBHs) to their host galaxies across many orders of magnitude in spatial and temporal scales, making this problem notoriously challenging to simulate. We use a multi-zone computational method based on
Hyerin Cho +6 more
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Galaxies, 2023 In the past few years, the Event Horizon Telescope (EHT) has provided the first-ever event horizon-scale images of the supermassive black holes (BHs) M87* and Sagittarius A* (Sgr A*).
Koushik Chatterjee +20 more
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The effective action of superrotation modes
Journal of High Energy Physics, 2021 Starting from an analysis of four-dimensional asymptotically flat gravity in first order formulation, we show that superrotation reparametrization modes are governed by an Alekseev-Shatashvili action on the celestial sphere.
Kévin Nguyen, Jakob Salzer
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Extreme Tidal Stripping May Explain the Overmassive Black Hole in Leo I: A Proof of Concept
The Astrophysical Journal Letters, 2023 A recent study found dynamical evidence of a supermassive black hole of ∼3 × 10 ^6 M _⊙ at the center of Leo I, the most distant dwarf spheroidal galaxy of the Milky Way. This black hole, comparable in mass to the Milky Way’s Sgr A*, places the system >2
Fabio Pacucci, Yueying Ni, Abraham Loeb
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Galaxies, 2022 Tidal disruption events (TDEs) around supermassive black holes (SMBHs) are a potential laboratory to study super-Eddington accretion disks and sometimes result in powerful jets or outflows which may shine in the radio and sub-millimeter bands.
Brandon Curd +3 more
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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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QCD and spin effects in black hole airshowers [PDF]
, 2007 In models with large extra dimensions, black holes may be produced in high-energy particle collisions. We revisit the physics of black hole formation in extensive airshowers from ultrahigh-energy cosmic rays, focusing on collisional QCD and black hole ...
Arunava Roy +2 more
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A Possible Evolution of Black Holes by Using a Hydrodynamic Analogy [PDF]
INCAS Bulletin, 2023 The creation of black holes starts with the implosion of a star after the fuel to power the thermonuclear reactions from inside was consumed. Then more and more mass is added until a critical value of the ratio mass/radius was obtained.
Corneliu BERBENTE, Sorin BERBENTE
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Journal 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
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