Results 21 to 30 of about 2,137,135 (205)
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 +5 more
doaj +1 more source
Astrophysical Appearance of Primordial Black Holes
Astronomy Reports, 2023 14 pages, 3 figures, Paper presented at the Fifth Zeldovich meeting, an international conference in honor of Ya. B. Zeldovich held in Yerevan, Armenia on June 12--16, 2023. Submitted to Astronomy Reports by the recommendation of the special editors: R. Ruffini, N. Sahakyan and G.
Postnov, Konstantin +2 more
openaire +2 more sources
Quantum black hole seismology. II. Applications to astrophysical black holes [PDF]
Physical Review D, 2020 14 pages, 14 figures. NO and DT equally contributed to this work.
Oshita, Naritaka +2 more
openaire +2 more sources
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 +2 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
Accretion Into and Emission from Black Holes [PDF]
, 1976 Analyses are given of various processes involving matter falling into or coming out of black holes. A significant amount of matter may fall into a black hole in a galactic nucleus or in a binary system.
Page, Don Nelson
core +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
Classical and thermodynamic stability of black holes [PDF]
, 2010 We consider the stability of black holes within both classical general relativity and the semiclassical thermodynamic description. In particular, we study linearised perturbations and their contributions to the gravitational partition function. Exploring
core +2 more sources
, 2015 Published in 2015 as Chapter 1 of 'General Relativity: The most beautiful of theories: Applications and trends after 100 years', Edited by Carlo Rovelli (pub. De Gruyter)
Fabian, Andrew C., Lasenby, Anthony N.
openaire +2 more sources