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Nonflat time-variable dark energy cosmology
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abstract
We generalize the time-variable dark energy scalar field $\Phi$ model ($\Phi$CDM) to nonflat space. We show that even in the space-curvature-dominated epoch the scalar field solution is a time-dependent fixed point or attractor, with scalar field energy density that grows relative to the energy density in spatial curvature. This is the first example of a physically consistent and complete model of dynamical dark energy in a nonflat geometry.
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Cited by 2 Pith papers
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Updated observational constraints on $\phi$CDM dynamical dark energy cosmological models
Updated φCDM constraints from Planck 2018 + non-CMB data find α=0.055±0.041, consistent with a cosmological constant and only mildly favoring evolving quintessence.
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Using SPTpol, Planck 2015, and non-CMB data to constrain tilted spatially-flat and untilted non-flat $\Lambda$CDM, XCDM, and $\phi$CDM dark energy inflation cosmologies
Joint constraints from SPTpol, Planck 2015, and non-CMB data in six dark energy cosmologies find no strong data tension and continue to favor spatially closed universes over flat ones.
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