Results 51 to 60 of about 3,411,153 (359)
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
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
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
Physics Letters B, 2019 The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared is defined as a function of its equation of state (EoS) parameter.
Dalibor Perković, Hrvoje Štefančić
doaj +1 more source
VISCOUS DARK FLUID UNIVERSE: A UNIFIED MODEL OF THE DARK SECTOR? [PDF]
International Journal of Modern Physics: Conference Series, 2011 The Universe is modeled as consisting of pressureless baryonic matter and a bulk viscous fluid which is supposed to represent a unified description of the dark sector. In the homogeneous and isotropic background the total energy density of this mixture behaves as a generalized Chaplygin gas.
Zimdahl, W. +2 more
openaire +2 more sources
Kerr–Newman-AdS black hole surrounded by perfect fluid matter in Rastall gravity
European Physical Journal C: Particles and Fields, 2018 The Rastall gravity is the modified Einstein general relativity, in which the energy-momentum conservation law is generalized to $$T^{\mu \nu }_{~~;\mu }=\lambda R^{,\nu }$$ T;μμν=λR,ν .
Zhaoyi Xu +3 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
Dark energy coupled with dark matter in viscous fluid cosmology [PDF]
Astrophysics and Space Science, 2014 6 pages, no figures; to appear in Astrophys.
Brevik, I. +2 more
openaire +2 more sources
Physics Letters B, 2008 4 pages, 1 figure, added ...
Folomeev, Vladimir, Gurovich, Victor
openaire +2 more sources
Dark energy and dark matter from an additional adiabatic fluid [PDF]
Physical Review D, 2016 The Dark Sector is described by an additional barotropic fluid which evolves adiabatically during the universe's history and whose adiabatic exponent $ $ is derived from the standard definitions of specific heats. Although in general $ $ is a function of the redshift, the Hubble parameter and its derivatives, we find that our assumptions lead ...
Dunsby, Peter K. S. +2 more
openaire +2 more sources