TY - JOUR

T1 - Testing the Rh = ct Universe Jointly with the Redshift-dependent Expansion rate and Angular-diameter and Luminosity Distances

AU - Wan, Hao Yi

AU - Cao, Shu Lei

AU - Melia, Fulvio

AU - Zhang, Tong Jie

N1 - Publisher Copyright:
Copyright © 2019, The Authors. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2019/10/29

Y1 - 2019/10/29

N2 - 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 s−1 Mpc−1, which matches previous measurements (∼ 63 km s−1 Mpc−1) based on best fits to individual data sets. For ΛCDM, our inferred value of the Hubble constant, H0 = 67.013 ± 2.578 km s−1 Mpc−1, 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 s−1 Mpc−1, 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.

AB - 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 s−1 Mpc−1, which matches previous measurements (∼ 63 km s−1 Mpc−1) based on best fits to individual data sets. For ΛCDM, our inferred value of the Hubble constant, H0 = 67.013 ± 2.578 km s−1 Mpc−1, 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 s−1 Mpc−1, 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.

KW - Cosmological observations

KW - Cosmological parameters

KW - Cosmological theory

KW - Dark energy

KW - Galaxies

KW - Large-scale structure

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M3 - Article

AN - SCOPUS:85094800887

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -