Observational evidence for cosmological coupling of black holes and its implications for an astrophysical source of dark energy
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 …
of cosmic history. The Kerr black hole solution is, however, provisional as its behavior at …
Spherical inhomogeneous solutions of Einstein and scalar–tensor gravity: A map of the land
We review spherical and inhomogeneous analytic solutions of the field equations of Einstein
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …
A preferential growth channel for supermassive black holes in elliptical galaxies at z≲ 2
The assembly of stellar and supermassive black hole (SMBH) mass in elliptical galaxies
since z∼ 1 can help to diagnose the origins of locally observed correlations between SMBH …
since z∼ 1 can help to diagnose the origins of locally observed correlations between SMBH …
Dissimilar donuts in the sky? Effects of a pressure singularity on the circular photon orbits and shadow of a cosmological black hole
The black hole observations obtained so far indicate one thing: similar" donuts" exist in the
sky. But what if some of the observed black hole shadows that will be obtained in the future …
sky. But what if some of the observed black hole shadows that will be obtained in the future …
General relativistic polytropes with a repulsive cosmological constant
Z Stuchlík, S Hledik, J Novotný - Physical Review D, 2016 - APS
Spherically symmetric equilibrium configurations of perfect fluid obeying a polytropic
equation of state are studied in spacetimes with a repulsive cosmological constant. The …
equation of state are studied in spacetimes with a repulsive cosmological constant. The …
Observational implications of cosmologically coupled black holes
It was recently suggested that" cosmologically coupled" black holes with masses that
increase in proportion to the volume of the Universe might constitute the physical basis of …
increase in proportion to the volume of the Universe might constitute the physical basis of …
Turnaround radius in modified gravity
V Faraoni - Physics of the Dark Universe, 2016 - Elsevier
In an accelerating universe in General Relativity there is a maximum radius above which a
shell of test particles cannot collapse, but is dispersed by the cosmic expansion. This radius …
shell of test particles cannot collapse, but is dispersed by the cosmic expansion. This radius …
Turnaround radius in an accelerated universe with quasi-local mass
V Faraoni, M Lapierre-Léonard… - Journal of Cosmology and …, 2015 - iopscience.iop.org
Abstract We apply the Hawking-Hayward quasi-local energy construct to obtain in a rigorous
way the turnaround radius of cosmic structures in General Relativity. A splitting of this quasi …
way the turnaround radius of cosmic structures in General Relativity. A splitting of this quasi …
Searching for dynamical black holes in various theories of gravity
We construct models of Einstein and f (R) gravity with two scalar fields, which admit
analytical solutions describing time-varying dynamical black holes. Their thermodynamics is …
analytical solutions describing time-varying dynamical black holes. Their thermodynamics is …