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The event horizon of a black hole is the limit of the black hole's influence; it is the boundary separating the region of influence of the black hole from the rest of the universe. The Schwarzschild radius, on the other hand, is the measure of the distance between the black hole's ...
I have read that the Schwarzschild radius of a black hole with the mass-energy of the observable universe is roughly equal to the actual Hubble radius of 13.8 billion light years. And I have read that contrary to some popular esoteric interpretations such as "the universe is a black hole",...
We investigate the physical properties of conformally Schwarzschild black holes (BHs) in a background of accelerating universe. We discuss the effect of the cosmic expansion on the principal quantities of the BH such as mass, temperature, entropy and horizon radius. In particular, we investigate ...
The introduction of extra spatial dimensions changes the linear relation between the radius of the event horizon and the mass of the black hole, and it also has a signature in the surface gravity of the event horizon. Then the temperature corresponding to the Hawking effect gets modified. In ...
9 The radius R of the shadow of Schwarzschild black hole perturbed by gravitational wave (3) for the static observer at different radial coordinate robs . The length of the lines represents the variation range of the radius R of black hole shadow in a time-period. We set M = 1, = ...
The fluid interior may be taken to represent a galaxy supercluster, for which the proper distance from the center of the supercluster to the cosmological horizon has the same order of magnitude as the Hubble radius derived from Friedmann-Robertson-Walker cosmologies. The fluid interior and ...
Applying the derived analogous potential it is found thatthe current accepted value of $\\Lambda \\sim 10^{-56} \\rm cm^{-2}$ moderatelyinfluences both sonic radius as well as Bondi accretion rate, especially forspherical accretion with smaller values of adiabatic constant and temperature,...
3 Quantization of Dirac fields in Schwarzschild spcetime Let's consider a Schwarzschild black hole that is given by the metric [42] ds2 = − 1 − 2M dt2 + 1 − 2M rr + r 2(dθ 2 + sin2 θ dϕ2), −1 dr2 (21) where r and M are respectively the radius and mass ...
(\omega _\textrm{r}<\omega _\mathrm {\theta }=\omega _\mathrm {\phi }\) holds, and there exists a periapsis shift for bounded elliptic-like trajectories implying the effect of relativistic precession that increases with decreasing radius of the orbit as the strong gravity region is entered...