Observational and Energetic Properties of Astrophysical and Galactic Black Holes
Symmetry, 2023 The work reviews the investigation of electromagnetic, optical, and energetic properties of astrophysical and galactic black holes and surrounding matter.
Bakhtiyor Narzilloev +2 more
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Testing conformal gravity with astrophysical black holes [PDF]
Physical Review D, 2017 Weyl conformal symmetry can solve the problem the spacetime singularities present in Einstein's gravity. In a recent paper, two of us have found a singularity-free rotating black hole solution in conformal gravity.
Cosimo Bambi +2 more
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Seeking observational evidence for the formation of trapping horizons in astrophysical black holes [PDF]
Physical Review D, 2018 Black holes in general relativity are characterized by their trapping horizon, a one-way membrane that can be crossed only inwards. The existence of trapping horizons in astrophysical black holes can be tested observationally using a reductio ad absurdum
Raúl Carballo-Rubio, Wenbin Lu
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Spinning Black Holes in Astrophysical Environments [PDF]
Physical Review LettersWe present stationary and axially symmetric black hole solutions to the Einstein field equations sourced by an anisotropic fluid, describing rotating black holes embedded in astrophysical environments.
Pedro G S Fernandes, Vitor Cardoso
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Primordial black holes and their gravitational-wave signatures. [PDF]
Living Rev Relativ, 2023 In the recent years, primordial black holes (PBHs) have emerged as one of the most interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could explain both some of the signals from binary black hole mergers observed in ...
Bagui E +20 more
europepmc +3 more sources
Spectral Lines of Quantized, Spinning Black Holes and their Astrophysical Relevance [PDF]
Physical Review Letters, 2019 In this Letter, we study black hole area quantization in the context of gravitational wave physics. It was recently argued that black hole area quantization could be a mechanism to produce so-called echoes as well as characteristic absorption lines in ...
Kostas Kokkotas +2 more
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Astrophysical imaging of Kerr black holes with scalar hair [PDF]
Physical Review D, 2016 We address the astrophysical imaging of a family of deformed Kerr black holes (BHs). These are stationary, asymptotically flat BH spacetimes that are solutions of general relativity minimally coupled to a massive, complex scalar field: Kerr BHs with ...
Eric Gourgoulhon +2 more
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Astrophysical Black Holes as Natural Laboratories for Fundamental Physics and Strong-Field Gravity [PDF]
Brazilian Journal of Physics, 2013 Astrophysical tests of general relativity belong to two categories: 1) “internal”, i.e. consistency tests within the theory (for example, tests that astrophysical black holes are indeed described by the Kerr solution and its perturbations), or 2 ...
Emanuele Berti, Berti Emanuele
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Microscopic Origin of the Entropy of Astrophysical Black Holes. [PDF]
Physical Review Letters, 2022 We construct an infinite family of microstates for black holes in Minkowski spacetime which have effective semiclassical descriptions in terms of collapsing dust shells in the black hole interior.
V. Balasubramanian +3 more
semanticscholar +1 more source
Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy [PDF]
Astrophysical Journal Letters, 2023 Observations have found black holes spanning 10 orders of magnitude in mass across most of cosmic history. The Kerr black hole solution is, however, provisional as its behavior at infinity is incompatible with an expanding universe.
D. Farrah +18 more
semanticscholar +1 more source