The Cosmological Effect of CMB/BAO Measurements

TL;DR

This paper presents new CMB/BAO measurements across a range of redshifts, demonstrating their ability to constrain cosmological models and break parameter degeneracies, with results consistent with Planck data.

Contribution

It provides a comprehensive set of CMB/BAO measurements and analyzes their effectiveness in constraining cosmological parameters and models.

Findings

CMB/BAO data can break degeneracies between parameters.

Results are consistent with Planck data and do not show H0 tension.

Extending parameters w and Ω_k0 can slightly reduce Ω_m0 tension.

Abstract

In this paper, the CMB/BAO measurements which cover the 13 redshift data in the regime $0.106 \leq z \leq 2.34$ are given out. The CMB/BAO samples are based on the BAO distance ratios $r_{s}(z_d)/D_{V}(z)$ and the CMB acoustic scales $l_{A}$. It could give out the accelerating behaviors of the $\Lambda$CDM, $w$CDM and o$\Lambda$CDM models. As the direction of the degeneracy of $\Omega_{m0}-w$ and $\Omega_{m0}-\Omega_{k0}$ are different for the CMB/BAO and BAO data, the CMB/BAO data show ability of breaking parameter degeneracy. Our tightest constraining results is from the BAO+Planck/BAO+$\Omega_{b}h^2$+$\Omega_{m}h^2$ data which has $\Omega_{m0}$ tension, but doesn't have $H_{0}$ tension with the Planck result. The extending parameters $w$ and $\Omega_{k0}$ could alleviate the $\Omega_{m0}$ tensions slightly.