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- W2139966611 abstract "Recent observations of high-redshift type Ia supernovae have placed stringent constraints on the cosmological constant ensuremath{Lambda}. We explore the implications of these SNe observations for cosmological models in which a classically evolving scalar field currently dominates the energy density of the Universe. Such models have been shown to share the advantages of ensuremath{Lambda} models: compatibility with the spatial flatness predicted by inflation; a Universe older than the standard Einstein--de Sitter model; and, combined with cold dark matter, predictions for large-scale structure formation in good agreement with data from galaxy surveys. Compared to the cosmological constant, these scalar field models are consistent with the SNe observations for a lower matter density, ${ensuremath{Omega}}_{m0}ensuremath{sim}0.2,$ and a higher age, ${H}_{0}{t}_{0}ensuremath{gtrsim}1.$ Combined with the fact that scalar field models imprint a distinctive signature on the cosmic microwave background anisotropy, they remain currently viable and should be testable in the near future." @default.
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- W2139966611 date "1998-04-15" @default.
- W2139966611 modified "2023-09-27" @default.
- W2139966611 title "Constraints from high redshift supernovae upon scalar field cosmologies" @default.
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- W2139966611 doi "https://doi.org/10.1103/physrevd.57.4642" @default.
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