Interacting dark energy in a closed universe
Nettet31. okt. 2024 · The two dark sectors of the universe—dark matter and dark energy—may interact with each other. Background and linear density perturbation evolution … NettetWe investigate the QCD ghost model of dark energy in the framework of Brans–Dicke cosmology. First, we study the non-interacting ghost dark energy in a flat …
Interacting dark energy in a closed universe
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Nettet8. jan. 2024 · In light of these two recent appealing scenarios, we consider here an interacting dark matter-dark energy model with a non-zero spatial curvature … NettetWe investigate the QCD ghost model of dark energy in the framework of Brans–Dicke cosmology. First, we study the non-interacting ghost dark energy in a flat Brans–Dicke theory. In this case we obtain the equation of state and the deceleration parameters and a differential equation governing the evolution of ghost energy density. Interestingly …
Nettet6. okt. 2024 · In light of these two recent appealing scenarios, we consider here an interacting dark matter-dark energy model with a non-zero spatial curvature … NettetHere we show that Interacting Dark Energy (IDE) models can ease the discrepancies between Planck and Supernovae Ia data in a closed Universe. Therefore IDE …
NettetDark Matter Hub. There's more of the universe that we don't understand than we do understand. Ordinary matter—the stuff that scientists have spent decades … Nettet2 dager siden · The recent analysis suggests that the dark matter was lumpy enough to fit with the standard model of cosmology, which relies on Einstein’s theory of gravity. Eric Baxter, an astronomer at the ...
Nettet12. sep. 2024 · To define time in the homogeneous anisotropic Bianchi-IX model of the universe, we propose a classical equation of motion of the proper time of the universe as an additional gauge condition. This equation is the law of conservation of energy. As a result, a new parameter, called a “mass” of the universe, appears. This parameter is …
Nettet1. mar. 2005 · Abstract. In this paper we investigate the epochs in which the Universe started accelerating and when it began to become dark energy–dominated (i.e., the dynamics of the expansion of the Universe dominated by the dark energy). We provide analytic expressions to calculate the redshifts of these epochs as a function of density … opdyke il countyNettet7. des. 2024 · In the framework of Einstein gravity, the most reasonable description for this accelerating phase introduces some hypothetical exotic matter, known as dark energy (DE) (having large negative pressure), which comprises about 70% of the total energy density [ 10] of the Universe. iowa game november 20Nettet1. des. 2024 · In this paper we perform a thorough dynamical systems analysis of the cubic galileon model non-minimally coupled to the dark matter. Three well-known classes of interacting models are considered where the energy exchange between the dark components is a function of the dark matter density and of the dark energy density: Q … opdyke christmas craft showNettet1. mar. 2024 · Here we show that interacting dark energy (IDE) models can ease the discrepancies between Planck and supernovae Ia data in a closed Universe, leading to … opdyke frenchtown njNettet19. aug. 2024 · Dark matter may consist of feebly interacting massive particles (FIMPs) that never thermalized with the cosmic plasma. Their relic density is achieved via freeze-in for a wide range of masses, significantly expanding the model space that can be tested compared to other production mechanisms. However, testing the tiny couplings … opdyke family medical centerNettetWe investigate the new agegraphic dark energy (NADE) model with power-law corrected entropy in the framework of Hoyrava-Lifshitz cosmology. For a non-flat universe containing the interacting power-law entropy-corrected NADE (PLECNADE) with dark opdyke illinois countyNettetIf hadronic matter fraction is about 0.05, dark matter is (0.25/0.3) = 83% of all matter. If 74% of all matter is small closed systems, those small bound systems account for 0.74 × 0.3 = 0.22 of energy density in the universe today, or (0.22 / 0.25) = 88% of dark matter. iowa games 2021 results