Revealing the effects of curvature on the cosmological models

分类： 天文学 >> 星系和宇宙学 提交时间： 2023-02-21

Weiqiang Yang William Giare Supriya Pan Eleonora Di Valentino Alessandro Melchiorri Joseph Silk

摘要： 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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