Results 21 to 30 of about 21,101 (315)

Fifty Years After the Discovery of the First Stellar-Mass Black Hole: A Review of Cyg X-1

Galaxies
Around 50 years ago, the famous bet between Stephen Hawking and Kip Thorne on whether Cyg X-1 hosts a stellar-mass black hole became a well-known story in the history of black hole science.
Jiachen Jiang
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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, Ben S. Prather, Ramesh Narayan, Priyamvada Natarajan, Kung-Yi Su, Angelo Ricarte, Koushik Chatterjee   +6 more
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Analogous Black Holes in Type-III Dirac Semimetal Ni₃In₂X₂ (X = S, Se)

Crystals, 2023
Black holes are objects that have a large mass and curve space time, characterized by their event horizon and singularity. Recently, an interesting concept of analogous black holes has emerged in the field of condensed matter physics.
Christopher Sims
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Horizon replicas in black hole shadows

Nuclear Physics B
Recently, new exploratory channels have opened up for the physics of highly compact objects, such as gravitational waves and black hole shadows. Moreover, more precise analysis and observations are now possible in the physics of accretion around compact ...
D. Pugliese, H. Quevedo
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Black Holes and Exotic Spinors

Universe, 2016
Exotic spin structures are non-trivial liftings, of the orthogonal bundle to the spin bundle, on orientable manifolds that admit spin structures according to the celebrated Geroch theorem.
J. M. Hoff da Silva, C. H. Coronado Villalobos, Roldao da Rocha   +2 more
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Celestial amplitudes in an ambidextrous basis

Journal of High Energy Physics, 2023
We start by constructing a conformally covariant improvement of the celestial light transform which keeps track of the mixing between incoming and outgoing states under finite Lorentz transformations in ℝ2,2.
Carmen Jorge-Diaz, Sabrina Pasterski, Atul Sharma   +2 more
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Physics of black holes [PDF]

AIP Conference Proceedings, 1982
The activity at the galactic center might be fuelled by energy release near a large black hole. In this talk I describe some relativistic effects which may be relevant to this process. I use Newtonian language so far as possible and illustrate the effects with simple  analogies.
openaire   +2 more sources

Braneworld black holes and entropy bounds

Physics 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, H. Hadi, C. Corda, F. Darabi   +3 more
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Gravitational footprints of black holes and their microstate geometries

Journal of High Energy Physics, 2021
We construct a family of non-supersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. The black holes can have finite angular momentum and an arbitrary charge-to-mass ratio, unlike their supersymmetric cousins ...
Ibrahima Bah, Iosif Bena, Pierre Heidmann, Yixuan Li, Daniel R. Mayerson   +4 more
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Evolving Black Hole Horizons in General Relativity and Alternative Gravity

Galaxies, 2013
From the microscopic point of view, realistic black holes are time-dependent and the teleological concept of the event horizon fails. At present, the apparent or trapping horizon seem to be its best replacements in various areas of black hole physics. We
Valerio Faraoni
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