Results 1 to 10 of about 186,540 (235)

Microscopic origin of the entropy of astrophysical black holes [PDF]

open access: greenPhysical 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.
Vijay Balasubramanian   +3 more
openalex   +3 more sources

Astrophysical black holes [PDF]

open access: greenFormation of the First Black Holes, 2019
In this chapter, we introduce the concept of a black hole (BH) and recount the initial theoretical predictions. We then review the possible types of BHs in nature, from primordial, to stellar-mass, to supermassive BHs.
Pedro R. Capelo
openalex   +3 more sources

Constraints on the Cosmological Coupling of Black Holes from the Globular Cluster NGC 3201 [PDF]

open access: yesThe Astrophysical Journal Letters, 2023
Globular clusters are among the oldest stellar populations in the Milky Way; consequently, they also host some of the oldest known stellar-mass black holes, providing insight into black hole formation and evolution in the early ( z ≳ 2) universe.
Carl L. Rodriguez
doaj   +2 more sources

Primordial black holes and their gravitational-wave signatures. [PDF]

open access: yesLiving 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

Astrophysical Black Holes: A Compact Pedagogical Review [PDF]

open access: green, 2018
Black holes are among the most extreme objects that can be found in the Universe and an ideal laboratory for testing fundamental physics. Here, the basic properties of black holes as expected from general relativity, the main astronomical observations ...
Cosimo Bambi
openalex   +3 more sources

Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy [PDF]

open access: yesThe 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.
Duncan Farrah   +18 more
doaj   +2 more sources

Possibility of hypothetical stable micro black hole production at future 100 TeV collider

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
We study the phenomenology of TeV-scale black holes predicted in theories with large extra dimensions, under the further assumption that they are absolutely stable. Our goal is to present an exhaustive analysis of safety of the proposed 100 TeV collider,
A. V. Sokolov, M. S. Pshirkov
doaj   +3 more sources

Astrophysical evidence for the existence of black holes [PDF]

open access: green, 1999
Following a short account of the history of the idea of black holes, we present a review of the current status of the search for observational evidence of their existence aimed at an audience of relativists rather than astronomers or astrophysicists.
A Celotti   +48 more
core   +4 more sources

Astrophysical black holes in screened modified gravity [PDF]

open access: green, 2014
Chameleon, environmentally dependent dilaton, and symmetron gravity are three models of modified gravity in which the effects of the additional scalar degree of freedom are screened in dense environments. They have been extensively studied in laboratory,
Anne-Christine Davis   +3 more
openalex   +3 more sources

Astrophysical flows near $$f\,\,(T)$$ f ( T ) gravity black holes [PDF]

open access: diamond, 2016
In this paper, we study the accretion process for fluids flowing near a black hole in the context of f(T) teleparallel gravity. Specifically, by performing a dynamical analysis by a Hamiltonian system, we are able to find the sonic points. After that, we
Ayyesha K. Ahmed   +4 more
openalex   +3 more sources

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