Matches in SemOpenAlex for { <https://semopenalex.org/work/W1999761260> ?p ?o ?g. }
- W1999761260 abstract "Abandoning the perfect fluid hypothesis, we investigate here the possibility that the dark energy equation of state (EoS) $w$ is a nonlinear function of the energy density $ensuremath{rho}$. To this aim, we consider four different EoS describing classical fluids near thermodynamical critical points and discuss the main features of cosmological models made out of dust matter and a dark energy term with the given EoS. Each model is tested against the data on the dimensionless coordinate distance to Type Ia Supernovae and radio galaxies, the shift and the acoustic peak parameters and the positions of the first three peaks in the anisotropy spectrum of the comic microwave background radiation. We propose a possible interpretation of each model in the framework of scalar field quintessence determining the shape of the self-interaction potential $V(ensuremath{phi})$ that gives rise to each one of the considered thermodynamical EoS. As a general result, we demonstrate that replacing the perfect fluid EoS with more general expressions gives both the possibility of successfully solving the problem of cosmic acceleration escaping the resort to phantom models." @default.
- W1999761260 created "2016-06-24" @default.
- W1999761260 creator A5015394317 @default.
- W1999761260 creator A5052487378 @default.
- W1999761260 creator A5076706548 @default.
- W1999761260 creator A5079862970 @default.
- W1999761260 date "2006-02-15" @default.
- W1999761260 modified "2023-10-02" @default.
- W1999761260 title "Beyond the perfect fluid hypothesis for the dark energy equation of state" @default.
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