Using DESI DR1 distance measurements, flat LambdaCDM is decisively preferred over R_h=ct, driven almost entirely by the Lyman-alpha data point at redshift 2.33.
Testing the Distance-Duality Relation in the $R_h=ct$ Universe
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abstract
In this paper, we test the cosmic distance duality (CDD) relation using the luminosity distances from joint light-curve analysis (JLA) type Ia supernovae (SNe Ia) sample and angular diameter distance sample from galaxy clusters. The $R_h=ct$ and $\Lambda$CDM models are considered. In order to compare the two models, we constrain the CCD relation and the SNe Ia light-curve parameters simultaneously. Considering the effects of Hubble constant, we find that $\eta\equiv D_A(1+z)^2/D_L=1$ is valid at the 2$\sigma$ confidence level in both models with $H_0 = 67.8\pm0.9$ km/s/Mpc. However, the CDD relation is valid at 3$\sigma$ confidence level with $H_0 = 73.45\pm1.66$ km/s/Mpc. Using the Akaike Information Criterion (AIC) and the Bayesian Information Criterion (BIC), we find that the $\Lambda$CDM model is very strongly preferred over the $R_h=ct$ model with these data sets for the CDD relation test.
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Comparison of $R_h=ct$ and $\Lambda$CDM using DESI DR1 measurements
Using DESI DR1 distance measurements, flat LambdaCDM is decisively preferred over R_h=ct, driven almost entirely by the Lyman-alpha data point at redshift 2.33.