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Thermodynamics and evaporation of perfect fluid dark matter black hole in phantom background [PDF]
European Physical Journal C: Particles and Fields, 2023 We present a novel interpretation of the thermodynamics of perfect fluid dark matter (PFDM) black hole based on Misner–Sharp energy and then investigate its evaporation behavior.
Xiao Liang +3 more
doaj +2 more sources
European Physical Journal C: Particles and FieldsIn this paper, we study the higher dimensional black holes of Lovelock gravity coupled with a conformal scalar field. The matter source of gravity is suggested to come from the Chaplygin-like dark fluid, i.e., the hybrid of a dark matter and dark energy.
Askar Ali, Khalid Saifullah
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Exotic Compact Objects with Two Dark Matter Fluids [PDF]
The Astrophysical Journal, 2023 The generic properties of compact objects made of two different fluids of dark matter are studied in a scale-invariant approach. We investigate compact objects with a core–shell structure, where the two fluids are separated, and with mixed dark matter ...
Marie Cassing +3 more
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Irreversible thermodynamic description of interacting dark energy - dark matter cosmological models [PDF]
Phys.Rev.D87:044018,2013, 2012 We investigate the interaction between dark energy and dark matter in the framework of irreversible thermodynamics of open systems with matter creation/annihilation. We consider dark energy and dark matter as an interacting two component (scalar field and "ordinary" dark matter) cosmological fluid in a homogeneous spatially flat and isotropic Friedmann-
Harko, Tiberiu, Lobo, Francisco S. N.
arxiv +3 more sources
The Unifying Dark Fluid Model [PDF]
AIP Conf.Proc.1241:700-707,2010, 2009 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
arxiv +5 more sources
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
Unified Dark Fluid with Constant Adiabatic Sound Speed and Cosmic Constraints [PDF]
Phys. Rev. D 85, 043003 (2012), 2011 As is known above 90% of the energy content in Universe is made of unknown dark component. Usually this dark fluid is separated into two parts: dark matter and dark energy. However, it may be a mixture of these two energy components, or just one exotic unknown fluid. This property is dubbed as dark degeneracy.
Noh, Hyerim, Wang, Yuting, Xu, Lixin
arxiv +3 more sources
Dark energy as an elastic strain fluid [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 7 pages, 6 figures, in press on ...
Ninfa Radicella +2 more
openalex +5 more sources
A new pressure-parametrization unified dark fluid model [PDF]
European Physical Journal C: Particles and Fields, 2017 We propose a new pressure-parametrization model to explain the accelerated expansion of the late-time Universe by considering the baryon matter and dark contents (dark matter and dark energy) as a unified dark fluid. To realize this model more physically,
Deng Wang, Yang-Jie Yan, Xin-He Meng
doaj +2 more sources
Darkness without dark matter and energy – generalized unimodular gravity [PDF]
Physics Letters B, 2017 We suggest a Lorentz non-invariant generalization of the unimodular gravity theory, which is classically equivalent to general relativity with a locally inert (devoid of local degrees of freedom) perfect fluid having an equation of state with a constant ...
A.O. Barvinsky, A.Yu. Kamenshchik
doaj +5 more sources