English

The Cosmological Effect of CMB/BAO Measurements

Cosmology and Nongalactic Astrophysics 2014-11-21 v1

Abstract

In this paper, the CMB/BAO measurements which cover the 13 redshift data in the regime 0.106z2.340.106 \leq z \leq 2.34 are given out. The CMB/BAO samples are based on the BAO distance ratios rs(zd)/DV(z)r_{s}(z_d)/D_{V}(z) and the CMB acoustic scales lAl_{A}. It could give out the accelerating behaviors of the Λ\LambdaCDM, wwCDM and oΛ\LambdaCDM models. As the direction of the degeneracy of Ωm0w\Omega_{m0}-w and Ωm0Ωk0\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+Ωbh2\Omega_{b}h^2+Ωmh2\Omega_{m}h^2 data which has Ωm0\Omega_{m0} tension, but doesn't have H0H_{0} tension with the Planck result. The extending parameters ww and Ωk0\Omega_{k0} could alleviate the Ωm0\Omega_{m0} tensions slightly.

Keywords

Cite

@article{arxiv.1411.5522,
  title  = {The Cosmological Effect of CMB/BAO Measurements},
  author = {Yi Zhang},
  journal= {arXiv preprint arXiv:1411.5522},
  year   = {2014}
}

Comments

16 pages, 3 figures, 3 tables