English

The tension on the cosmological parameters from different observational data

Cosmology and Nongalactic Astrophysics 2014-05-01 v4 General Relativity and Quantum Cosmology

Abstract

Planck measurements of the cosmic microwave background power spectra find a lower value of the Hubble constant H0H_0 and a higher value of the fractional matter energy density Ωm0\Omega_{m0} for the concordance Λ\LambdaCDM model, and these results are in tension with other measurements. The {\em Planck} group argued that the tension came either from some sources of unknown systematic errors in some astrophysical measurements or the wrong Λ\LambdaCDM model applied in fitting the data. We studied the reason for the tension on H0H_0 from different measurements by considering two dynamical dark energy models. We found that there is no tension between different data, the constraint on H0H_0 is almost unchanged for different dark energy models and the tension with the local measurements remains when the error bar on H0H_0 is tightened to be around 1. We argue that the tension on H0H_0 is not caused by the fitting model.

Keywords

Cite

@article{arxiv.1308.5627,
  title  = {The tension on the cosmological parameters from different observational data},
  author = {Qing Gao and Yungui Gong},
  journal= {arXiv preprint arXiv:1308.5627},
  year   = {2014}
}

Comments

full planck data and the JLA supernova data are used, typos corrected, CQG in press

R2 v1 2026-06-22T01:15:08.057Z