Charged Lovelock black holes in the presence of dark fluid with a nonlinear equation of state

Abstract

We consider a model that charged static spherically-symmetric black hole is surrounded by dark fluid with nonlinear equation of state p d = −B/ρ d . We find that the energy density of the dark fluid can be characterized by two parameters. The derivation of metric solution, as well as the calculation of black hole thermodynamical quantities as functions of horizon radius, are performed. Specially, in D-dimensional Einstein gravity and Gauss-Bonnet gravity cases, we plot the metric functions and corresponding thermodynamical quantities, such as mass, Hawking temperature and heat capacity, by varying the values of spacetime dimensions and dark fluid parameters. The effects of the dark fluid parameters on black hole solutions as well as on thermodynamical stability of black holes are discussed. Number(s): 04.20.Cv, 04.50.Gh, 95.35.+d PACS

Study of null and time-like geodesics in the exterior of a Schwarzschild black hole with quintessence and cloud of strings

“…And ever since the uplift in the attention to the dark side of the universe regarding the evidences like the flat galactic rotation curves, anti-lensing, and the accelerated expansion of the universe [36][37][38][39][40][41], relativists have become more inclined to the inclusion of cosmological components in the solutions to Einstein field equations, for them to be more compatible with astrophysical observations. In fact, the evolution of black holes are now seen to be affected by the dynamics of the universe where they reside [42][43][44][45]. From the the geometric point of view, this is approached by adding cosmological components to the black hole spacetime under consideration, to compensate for the dark features.…”

Study of null and time-like geodesics in the exterior of a Schwarzschild black hole with quintessence and cloud of strings

“…And ever since the uplift in the attention to the dark side of the universe regarding the evidences like the flat galactic rotation curves, anti-lensing, and the accelerated expansion of the universe [36][37][38][39][40][41], relativists have become more inclined to the inclusion of cosmological components in the solutions to Einstein field equations, for them to be more compatible with astrophysical observations. In fact, the evolution of black holes are now seen to be affected by the dynamics of the universe where they reside [42][43][44][45]. From the the geometric point of view, this is approached by adding cosmological components to the black hole spacetime under consideration, to compensate for the dark features.…”

Probing the parameters of a Schwarzschild black hole surrounded by quintessence and cloud of strings through four standard astrophysical tests

“…This process has been discussed extensively in the context of general relativity and alternative theories of gravity (see for example Refs. [9][10][11][12]). Geometrically, such calculations would add a dark component to the black hole spacetime under consideration, which is inferred from the cosmological energymomentum constituents.…”