Testing the Rh = ct Universe Jointly with the Redshift-dependent Expansion rate and Angular-diameter and Luminosity Distances

Hao Yi Wan, Shu Lei Cao, Fulvio Melia, Tong Jie Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

We use three different data sets, specifically H(z) measurements from cosmic chronometers, the HII-galaxy Hubble diagram, and reconstructed quasar-core angular-size measurements, to perform a joint analysis of three flat cosmological models: the Rh = ct Universe, ΛCDM, and wCDM. For Rh = ct, the 1σ best-fit value of the Hubble constant H0 is 62.336±1.464 km s1 Mpc1, which matches previous measurements (∼ 63 km s1 Mpc1) based on best fits to individual data sets. For ΛCDM, our inferred value of the Hubble constant, H0 = 67.013 ± 2.578 km s1 Mpc1, is more consistent with the Planck optimization than the locally measured value using Cepheid variables, and the matter density Ωm = 0.347 ±0.049 similarly coincides with its Planck value to within 1σ. For wCDM, the optimized parameters are H0 = 64.718 ± 3.088 km s1 Mpc1, Ωm = 0.247 ± 0.108 and w = −0.693 ± 0.276, also consistent with Planck. A direct comparison of these three models using the Bayesian Information Criterion shows that the Rh = ct universe is favored by the joint analysis with a likelihood of ∼ 97% versus . 3% for the other two cosmologies.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Oct 29 2019

Keywords

  • Cosmological observations
  • Cosmological parameters
  • Cosmological theory
  • Dark energy
  • Galaxies
  • Large-scale structure

ASJC Scopus subject areas

  • General

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