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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

Growth of a Massive Black Hole in a Dense Star Cluster Via Tidal Disruption Accretion

open access: yesThe Astrophysical Journal, 2023
Stars that are tidally disrupted by a massive black hole (MBH) may contribute significantly to the growth of the MBH, especially in dense nuclear star clusters.
Seungjae Lee, Ji-hoon Kim, Boon Kiat Oh
doaj   +1 more source

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

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   +1 more source

Radio Emission From a z = 10.1 Black Hole in UHZ1

open access: yesThe Astrophysical Journal, 2023
The recent discovery of a 4 × 10 ^7 M _⊙ black hole (BH) in UHZ1 at z = 10.3, just 450 Myr after the Big Bang, suggests that the seeds of the first quasars may have been direct-collapse BHs from the collapse of supermassive primordial stars at z ∼ 20 ...
Daniel J. Whalen   +2 more
doaj   +1 more source

First Detection of an Overmassive Black Hole Galaxy UHZ1: Evidence for Heavy Black Hole Seed Formation from Direct Collapse

open access: yesThe Astrophysical Journal Letters, 2023
The recent Chandra-JWST discovery of a quasar in the z ≈ 10.1 galaxy UHZ1 reveals that accreting supermassive black holes were already in place 470 million years after the Big Bang. The Chandra X-ray source detected in UHZ1 is a Compton-thick quasar with
Priyamvada Natarajan   +5 more
doaj   +1 more source

What is the final state of a black hole merger? [PDF]

open access: yes, 2018
In this short paper we discuss the possibility of testing the nature of astrophysical black holes using the recently observed black hole mergers. We investigate the possibility that a secondary black hole is created in the merger of two astrophysical ...
Calmet, Xavier, Casadio, Roberto
core   +2 more sources

Distinguishing Brans–Dicke–Kerr type naked singularities and black holes with their thin disk electromagnetic radiation properties

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
The possible existence of naked singularities, hypothetical astrophysical objects, characterized by a gravitational singularity without an event horizon is still an open problem in present day astrophysics.
Shahab Shahidi   +2 more
doaj   +1 more source

The Life and Times of Extremal Black Holes [PDF]

open access: yes, 2000
Charged extremal black holes cannot fully evaporate through the Hawking effect and are thus long lived. Over their lifetimes, these black holes take part in a variety of astrophysical processes, including many that lead to their eventual destruction ...
Adams, Fred C.
core   +2 more sources

Detectable universes inside regular black holes

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
While spacetime in the vicinity outside astrophysical black holes is believed to be well understood, the event horizon and the interior remain elusive. Here, we discover a degenerate infinite spectrum of novel general relativity solutions with the same ...
Zacharias Roupas
doaj   +1 more source

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