Results 31 to 40 of about 947,753 (292)
Dynamical Black Hole Masses of BL Lac Objects from the Sloan Digital Sky Survey [PDF]
, 2010 We measure black hole masses for 71 BL Lac objects from the Sloan Digital Sky Survey with redshifts out to z~0.4. We perform spectral decompositions of their nuclei from their host galaxies and measure their stellar velocity dispersions.
Becker +49 more
core +6 more sources
Regular black hole in three dimensions
, 2009 We find a new black hole in three dimensional anti-de Sitter space by introducing an anisotropic perfect fluid inspired by the noncommutative black hole. This is a regular black hole with two horizons.
A. Bonanno +26 more
core +1 more source
Physical Review D, 1996 One would expect spacetime to have a foam-like structure on the Planck scale with a very high topology. If spacetime is simply connected (which is assumed in this paper), the non-trivial homology occurs in dimension two, and spacetime can be regarded as being essentially the topological sum of $S^2\times S^2$ and $K3$ bubbles.
openaire +3 more sources
QUANTIZATION OF BLACK HOLES [PDF]
Modern Physics Letters A, 1998 We show that black holes can be quantized in an intuitive and elegant way with results in agreement with conventional knowledge of black holes by using Bohr's idea of quantizing the motion of an electron inside the atom in quantum mechanics. We find that properties of black holes can also be derived from an ansatz of quantized entropy [Formula: see ...
He, Xiao-Gang, Ma, Bo-Qiang
openaire +4 more sources
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
Abelian Higgs Hair for Electrically Charged Dilaton Black Holes
, 1998 It is argued that an electronically charged dilaton black hole can support a long range field of a Nielsen-Olesen string. Combining both numerical and perturbative techniques we examine the properties of an Abelian-Higgs vortex in the presence of the ...
A. Achucarro +26 more
core +1 more source
A Simple, Approximate Method for Analysis of Kerr-Newman Black Hole Dynamics and Thermodynamics [PDF]
, 2006 In this work we present a simple, approximate method for analysis of the basic dynamical and thermodynamical characteristics of Kerr-Newman black hole.
Chitta Baral +3 more
core +3 more sources
Modern Physics Letters A, 2008 Lovelock theory is a natural extension of Einstein theory of gravity to higher dimensions, and it is of great interest in theoretical physics as it describes a wide class of models. In particular, it describes string theory inspired ultraviolet corrections to Einstein–Hilbert action, while admits the Einstein general relativity and the so-called Chern–
Garraffo, Cecilia, Giribet, Gaston
openaire +2 more sources
Thermodynamics and phase transition of BTZ black hole in a cavity
Nuclear Physics B, 2022 In this paper, we study the thermodynamics and phase transition of a BTZ black hole in a finite space region, namely a cavity. By imposing a temperature-fixed boundary condition on the wall of the cavity and evaluating the Euclidean action, we derive the
Yuchen Huang, Jun Tao
doaj +1 more source
The Redshift Evolution of the M •–M ⋆ Relation for JWST’s Supermassive Black Holes at z > 4
The Astrophysical JournalJWST has detected many overmassive galactic systems at z > 4, where the mass of the black hole, M _• , is 10–100 times larger than expected from local relations, given the host’s stellar mass, M _⋆ .
Fabio Pacucci, Abraham Loeb
doaj +1 more source