CPL effective dark energy from the backreaction effect
Abstract
In this paper, we interpret the dark energy as an effect caused by small scale inhomogeneities of the universe with the use of the spatial averaged approach of Buchert. The model considered here adopts the Chevallier-Polarski-Linder(CPL) parameterizations of the equation of state of the effective perfect fluid from the backreaction effect. Thanks to the effective geometry introduced by Larena et. al.\cite{larena2009testing} in their previous work, we confront such backreaction model with latest type Ia supernova and Hubble parameter observations, coming out with results that reveal the difference between the Friedmann-Lema\^{\i}tre-Robertson-Walker model and backreaction model.
Keywords
Cite
@article{arxiv.2406.15442,
title = {CPL effective dark energy from the backreaction effect},
author = {Yan-Hong Yao and Xin-He Meng},
journal= {arXiv preprint arXiv:2406.15442},
year = {2024}
}
Comments
13 pages, 4 figures, 2 table, published on mpla. arXiv admin note: substantial text overlap with arXiv:1707.00111, arXiv:2205.09326