Results 51 to 60 of about 3,373,254 (352)
Teleparallelism by inhomogeneous dark fluid [PDF]
Astrophysics and Space Science, 2015 In this paper, we investigate $f(T)$ cosmology and find an exact solution for $f$ which gives a Little Rip cosmology. Also, considering accelerating cosmology with dark matter, the time-dependent solution is found. For these cases, by using solutions obtained from $f(T)$ gravity we find expressions for $ $ and $ $ defined as time functions via ...
Aizhan Myrzakul +2 more
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Study of circular geodesics and shadow of rotating charged black hole surrounded by perfect fluid dark matter immersed in plasma [PDF]
Classical and quantum gravity, 2021 In this work, we consider a rotating charged black hole surrounded by perfect fluid dark matter. We consider the system to be immersed in non-magnetised, pressureless plasma.
Anish Das +2 more
semanticscholar +1 more source
Physics Letters B, 2008 4 pages, 1 figure, added ...
Victor Gurovich, Vladimir Folomeev
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Geodesic structure, shadow and optical appearance of black hole immersed in Chaplygin-like dark fluid [PDF]
Journal of Cosmology and Astroparticle PhysicsIn this study, we focus on a black hole immersed in a cosmological Chaplygin-like dark fluid (CDF), characterized by the equation of state p = -B/ρ and an additional parameter q influencing the energy density of the fluid.
X. Li +4 more
semanticscholar +1 more source
Observational constraints of a new unified dark fluid and the H0 tension [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Unified cosmological models have received a lot of attention in astrophysics community for explaining both the dark matter and dark energy evolution.
Weiqiang Yang +4 more
semanticscholar +1 more source
A PAge-like Unified Dark Fluid model [PDF]
Journal of Cosmology and Astroparticle PhysicsThe unified dark fluid model unifies dark matter and dark energy into a single component, providing an alternative and more concise framework for interpreting cosmological observations.
Junchao Wang +5 more
semanticscholar +1 more source
Rip Cosmology via Inhomogeneous Fluid
Galaxies, 2013 The conditions for the appearance of the Little Rip, Pseudo Rip and Quasi Rip universes in the terms of the parameters in the equation of state of some dark fluid are investigated. Several examples of the Rip cosmologies are investigated.
Alexander V. Timoshkin +2 more
doaj +1 more source
Joule–Thomson expansion of RN-AdS black hole immersed in perfect fluid dark matter [PDF]
Communications in Theoretical Physics, 2021 In this paper, we study the Joule–Thomson expansion for RN-AdS black holes immersed in perfect fluid dark matter. As perfect fluid dark matter is one of the dark matter candidates, we are interested in how it influences the thermodynamic properties of ...
Yi Cao, Hanwen Feng, Wei Hong, Jun Tao
semanticscholar +1 more source
Physics Letters B, 2007 AbstractWe address the question of unified description of dark ingredients in the Universe by a vacuum dark fluid with continuous density and pressures, which represents both distributed vacuum dark energy by a time evolving and spatially inhomogeneous cosmological term, and compact self-gravitating objects with de Sitter vacuum trapped inside.
Evgeny Galaktionov, Irina Dymnikova
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Dark radiation from a unified dark fluid model [PDF]
Progress of Theoretical and Experimental Physics, 2014 We present a unified dark fluid model to describe the possible evolutionary behavior of $ N_\mathrm{eff}$ in dark radiation. This model can be viewed as an interacting model for the dark sectors, in which dark matter interacts with dark radiation. We show that the evolution of $ N_\mathrm{eff}$ can be nicely explained without some drawbacks, such as ...
Lu-Hsing Tsai +4 more
openaire +4 more sources