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Revealing the effects of curvature on the cosmological models

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arxiv 2210.09865 v2 pith:KTZKW4TJ submitted 2022-10-18 astro-ph.CO gr-qc

Revealing the effects of curvature on the cosmological models

Weiqiang Yang , William Giar\`e , Supriya Pan , Eleonora Di Valentino , Alessandro Melchiorri , Joseph Silk This is my paper
classification astro-ph.CO gr-qc
keywords datauniversecosmologiescurvatureeffectsacousticaddingastronomical
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In this paper we consider the effects of adding curvature in extended cosmologies involving a free-to-vary neutrino sector and different parametrizations of Dark Energy (DE). We make use of the Planck 2018 cosmic microwave background temperature and polarization data, Baryon Acoustic Oscillations and Pantheon type Ia Supernovae data. Our main result is that a non-flat Universe cannot be discarded in light of the current astronomical data, because we find an indication for a closed Universe in most of the DE cosmologies explored in this work. On the other hand, forcing the Universe to be flat can significantly bias the constraints on the equation of state of the DE component and its dynamical nature.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Intertwined Constraints in Extended Cosmologies: Dark Energy, Curvature, Neutrinos, and Inflation

    astro-ph.CO 2026-07 unverdicted novelty 4.0

    Dynamical dark energy remains preferred across extended models while curvature, neutrino mass and inflation parameters show strong model dependence, with no resolution of the H0 tension.

  2. The Generalized Second Law and the Spatial Curvature Index

    gr-qc 2025-10 unverdicted novelty 4.0

    Generalized second law on the apparent horizon plus w ≥ -1 and the dominant energy condition rules out hyperbolic spatial sections for homogeneous isotropic universes.