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Covariant generalized holographic dark energy and accelerating universe [PDF]

European Physical Journal C: Particles and Fields, 2017
We propose the generalized holographic dark energy model where the infrared cutoff is identified with the combination of the FRW universe parameters: the Hubble rate, particle and future horizons, cosmological constant, the universe lifetime (if finite ...
Shin’ichi Nojiri, S. D. Odintsov
doaj   +4 more sources

Statistical and Dynamical Decoupling of the IGM from Dark Matter

Advances in Astronomy, 2011
Although the gravitational field in the universe is dominated by dark matter, cosmological observations show that the statistical properties of cosmic baryonic matter are significantly and systematically decoupled from that of the underlying dark matter.
Li-Zhi Fang, Weishan Zhu
doaj   +3 more sources

Modeling holographic dark energy with particle and future horizons

Nuclear Physics B, 2020
In this work we explore some cosmological properties coming from the particle and future horizons when are considered as candidates to model the dark energy sector within a holographic context in a flat Friedmann-Lemaitre-Robertson-Walker universe; we ...
Miguel Cruz, Samuel Lepe
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Boosted dark matter from a phantom fluid

Physics Letters B, 2023
It is known that theories of phantom dark energy, considered as quantum fields, predict a continuous production of positive- plus negative-energy particles, from spontaneous decay of the vacuum.
James M. Cline, Matteo Puel, Takashi Toma   +2 more
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Unified dark fluid with fast transition: including entropic perturbations [PDF]

, 2013
In this paper, we investigate a unified dark fluid model with fast transition and entropic perturbations. An effective sound speed is designated as an additional free model parameter when the entropic perturbations are included, and if the entropic ...
Xu, Lixin, Yang, Weiqiang
core   +2 more sources

Gravitational lensing of Euler-Heisenberg black hole surrounded by perfect fluid dark matter [PDF]

Nuclear Physics B
In this work, we study the gravitational lensing of Euler-Heisenberg black hole surrounded by perfect fluid dark matter. This kind of black hole solution enables us to investigate the nontrivial interplay between the dark matter effects and nonlinear ...
Ping Su, Chen-Kai Qiao
doaj   +2 more sources

The nature of phantom dark energy and its relation to time crystals [PDF]

Scientific Reports
In this letter we show that, at its fundamental level, phantom dark energy is a fluid made up of time crystals that permeate the fabric of space-time.
Laura Mersini-Houghton
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The Formulation of Scaling Expansion in an Euler-Poisson Dark-Fluid Model

Universe, 2023
We present a dark fluid model described as a non-viscous, non-relativistic, rotating, and self-gravitating fluid. We assume that the system has spherical symmetry and that the matter can be described by the polytropic equation of state.
Balázs Endre Szigeti, Imre Ferenc Barna, Gergely Gábor Barnaföldi   +2 more
doaj   +1 more source

Self-Similar Solutions of a Gravitating Dark Fluid

Mathematics, 2022
In this paper, a fluid model is presented which contains the general linear equation of state including the gravitation term. The obtained spherical symmetric Euler equation and the continuity equations were investigated with the Sedov-type time ...
Imre Ferenc Barna, Mihály András Pocsai, Gergely Gábor Barnaföldi   +2 more
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General Relativistic Space-Time with η₁-Einstein Metrics

Mathematics, 2022
The present research paper consists of the study of an η1-Einstein soliton in general relativistic space-time with a torse-forming potential vector field.
Yanlin Li, Fatemah Mofarreh, Santu Dey, Soumendu Roy, Akram Ali   +4 more
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