DARK FLUID: TOWARDS A UNIFICATION OF EMPIRICAL THEORIES OF GALAXY ROTATION, INFLATION AND DARK ENERGY [PDF]
The Astrophysical Journal, 2008 Empirical theories of Dark Matter like MOND gravity and of Dark Energy like f(R) gravity were motivated by astronomical data. But could these theories be branches rooted from a more general hence natural framework? Here we propose the natural Lagrangian of such a framework based on simple dimensional analysis and co-variant symmetry requirements, and ...
Hongsheng Zhao, Baojiu Li
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The nature of phantom dark energy and its relation to time crystals [PDF]
Scientific ReportsIn 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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Analytic fluid approximation for warm dark matter [PDF]
Astroparticle Physics, 2023 16 pages, 5 ...
Jorge Mastache, Axel de la Macorra
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Unified dark fluid in Brans–Dicke theory [PDF]
The European Physical Journal C, 2014 Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans–Dicke theory with a self-interacting potential. A unified dark fluid characterised by a linear equation of state is considered as the source of dark energy.
S. K. Tripathy, D. Behera, B. Mishra
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Bianchi type-II models in the presence of perfect fluid and anisotropic dark energy [PDF]
, 2012 Spatially homogeneous but totally anisotropic and non-flat Bianchi type II cosmological model has been studied in general relativity in the presence of two minimally interacting fluids; a perfect fluid as the matter fluid and a hypothetical anisotropic ...
Suresh Kumar, Özgür Akarsu
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Topological classes of thermodynamics of black holes in perfect fluid dark matter background [PDF]
The European Physical Journal C, 2023 In this paper we explore the topological classes of thermodynamics of a family of black holes. In particular we investigate the influence of distinct fields, including the electric field, non-linear magnetic field, along with the perfect fluid matter ...
Muhammad Rizwan, K. Jusufi
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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 +2 more
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Quasinormal modes, Hawking radiation and absorption of the massless scalar field for Bardeen black hole surrounded by perfect fluid dark matter [PDF]
Modern Physics Letters A, 2023 We study the quasinormal modes, Hawking radiation and absorption cross-section of the Bardeen black hole surrounded by perfect fluid dark matter for a massless scalar field. Our results show that the oscillation frequency of quasinormal modes is enhanced
Qi Sun, Qian Li, Yu Zhang, Qi-Quan Li
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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 +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 +4 more
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