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- W4287642816 abstract "In this paper, we will deepen the understanding of some fluid models proposed by other authors for the description of dark energy. Specifically, we will show that the so-called (Modified) Berthelot fluid is the hydrodynamic realization of the Dirac-Born-Infeld theory and that the Dieterici fluid admits a non-relativistic $k$-essence formulation; for the former model, the evolution of the scalar field will be written in terms of some cosmographic parameters. The latter model will also be tested using Machine Learning algorithms with respect to cosmic chronometers data, and results about the dynamics at a background level will be compared with those arising when other fluids (Generalized Chaplygin Gas and Anton-Schmidt) are considered. Due to some cosmic opacity effects, the background cosmology of universes filled by these inequivalent fluids, as they arise in physically different theories, may not be enough for discriminating among them. Thus, a perturbation analysis in the long-wavelength limit is carried out revealing a rich variety of possible behaviors." @default.
- W4287642816 created "2022-07-25" @default.
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- W4287642816 date "2020-10-11" @default.
- W4287642816 modified "2023-10-16" @default.
- W4287642816 title "Revisiting the foundation and applicability of some dark energy fluid models in the Dirac-Born-Infeld framework" @default.
- W4287642816 doi "https://doi.org/10.48550/arxiv.2010.05278" @default.
- W4287642816 hasPublicationYear "2020" @default.
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