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An interstellar mission to test astrophysical black holes. [PDF]

iScience
Bambi C.
europepmc   +2 more sources

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

The 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

Radio Emission From a z = 10.1 Black Hole in UHZ1

The 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, Muhammad A. Latif, Mar Mezcua   +2 more
doaj   +1 more source

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

The 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

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

The 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, Fabio Pacucci, Angelo Ricarte, Ákos Bogdán, Andy D. Goulding, Nico Cappelluti   +5 more
doaj   +1 more source

Detectable universes inside regular black holes

European 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

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

European 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, Tiberiu Harko, Zoltán Kovács   +2 more
doaj   +1 more source

Constraints on relic magnetic black holes

Journal of High Energy Physics, 2022
We present current direct and astrophysical limits on the cosmological abundance of black holes with extremal magnetic charge. Such black holes do not Hawking radiate, allowing those normally too light to survive to the present to do so.
Melissa D. Diamond, David E. Kaplan
doaj   +1 more source

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

European 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   +1 more source

Extremal bifurcations of rotating AdS4 black holes

Journal of High Energy Physics, 2021
The Weak Gravity Conjecture arises from the assertion that all extremal black holes, even those which are “classical” in the sense of being very massive, must decay by quantum-mechanical emission of particles or smaller black holes.
Brett McInnes
doaj   +1 more source