Focusing on the special case of generalized Rastall theory, as a subclass of the non-minimal curvature-matter coupling theories in which the field equations are mathematically similar to the Einstein field equations in the presence of cosmological constant, we find two classes of...
It also is uniquely described by the electro-vacuum black hole solutions of the Einstein–Maxwell system. It can be specified by three parameters: the black hole mass \mathcal{M}, the charge Q, and the angular momentum per unit mass a=J/\mathcal{M}. As long as \mathcal{M}^2 \ge...
It seems using double standards in physics can explain why in recent years physicists have started to talk about black holes as something established and accepted (by not interpreting “infinite time” as “never”), whereas, according to the Schwarzschild solution of the Einstein equation, black ...
Quantum corrections to the enthalpy and the equation of state of the BTZ black hole are studied.doi:10.1088/0264-9381/28/12/125020Dolan, Brian PClass.quant.gravB.P. Dolan, The cosmological constant and the black hole equation of state, Class. Quantum Gravity 28 (2011) 125020, arXiv:...
& Li, M. H2 suppression with shocking inflows: testing a pathway for supermassive black hole formation. Mon. Not. R. Astron. Soc. 439, 3798–3807 (2014). Article ADS CAS Google Scholar Mortlock, D. J. et al. A luminous quasar at a redshift of z = 7.085. Nature 474, 616–619...
Equation (6) has the benefit that there is a single scalar index that reproduces all null geodesics and the polarization of light moving along these geodesics, and as the material is isotropic (though still inhomogeneous) it is thus easier to construct experimentally. However, this refractive ...
Black Hole Spacetime Equation in Special RelativityMaziar KhoshsimaM. Khoshsima, "Black Hole Spacetime Equation in Special Relativity." International Journal of Astronomy, Astrophysics and Space Science; Vol. 2, No. 4, 2015, pp. 30-33.
We also probe the EoS needed for the emergent universe which admits different compositions of the cosmic fluid surrounding the black hole to probe the evolution and then compared the evolutionary features for the other polynomial form of the EoS. In f ( Q ) modified gravity, primordial black ...
4.2 Second model of black hole In this model we adopt the symmetry presented in Eq. (48), as before, since it gives us analytical solutions. We model the non-metricity scalar from Eq. (47) so that it becomes a regular quantity, which allows us to obtain a differential equation to fin...
There does not exist black hole solutions without a hair in DEGB theory. If we have = 0 in DEGB theory, dilaton equation of motion in Eq. (4) has only the RG2 B term. However, the GB term should be non-zero, so it cannot satisfy Eq. (4). The coupling α could be absorbed...