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European Physical Journal C: Particles and Fields, 2021 In this paper, we test the weak cosmic censorship conjecture (WCCC) for the Reissner–Nordström–de Sitter (RN-dS) black hole surrounded by perfect fluid dark matter.
Sanjar Shaymatov +2 more
doaj +1 more source
Non-adiabatic dark fluid cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 We model the dark sector of the cosmic substratum by a viscous fluid with an equation of state $p=- $, where $ $ is the fluid-expansion scalar and $ $ is the coefficient of bulk viscosity for which we assume a dependence $ \propto ^ $ on the energy density $ $.
Hipolito-Ricaldi, W.S. +2 more
openaire +3 more sources
The Fate of the Universe: Dark Energy Dilution? [PDF]
, 2007 We study the possibility that dark energy decays in the future and the universe stops accelerating. The fact thatthe cosmological observations prefer an equation of state of dark energy smaller than -1 can be a signal that dark energy will decay in the ...
de la Macorra, A.
core +2 more sources
Two-fluid dark matter models [PDF]
Physical Review D, 2011 6 pages, two figures, accepted for publication in ...
Lobo, FSN, Harko, T
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Making (dark matter) waves: Untangling wave interference for multi-streaming dark matter
The Open Journal of Astrophysics, 2022 The classical dynamics of collisionless cold dark matter, commonly described by fluid variables or a phase-space distribution, can be captured in a single semiclassical wavefunction.
Alex Gough, Cora Uhlemann
doaj +1 more source
The Astrophysical Journal, 2000 Dark matter modeled as a classical scalar field that interacts only with gravity and with itself by a potential that is close to quartic at large field values and approaches a quadratic form when the field is small would be gravitationally produced by inflation and at the present epoch could act like an ideal fluid with pressure that is a function only
openaire +3 more sources
Dark Energy from Wet Dark Fluid
, 2004 11 pages JHEP 6 figures; v2 added references, candidate microphysical model and edited to conserve length; v3 major revision: images enlarged, paper extended to include new discussion and ...
Holman, Richard, Naidu, Siddartha
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The Unifying Dark Fluid Model [PDF]
AIP Conference Proceedings, 2010 The standard model of cosmology relies on the existence of two components, "dark matter" and "dark energy", which dominate the expansion of the Universe. There is no direct proof of their existence, and their nature is still unknown. Many alternative models suggest other cosmological scenarios, and in particular the dark fluid model replace the dark ...
Alexandre Arbey +2 more
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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 ...
Güdekli, Ertan +2 more
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Analytic fluid approximation for warm dark matter
Astroparticle Physics, 2023 16 pages, 5 ...
Jorge Mastache, Axel de la Macorra
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