Model Comparison of $Λ$CDM vs $R_h=ct$ using Cosmic Chronometers

Haveesh Singirikonda; Shantanu Desai

doi:10.1140/epjc/s10052-020-8289-8

paper

Model Comparison of $Λ$ CDM vs $R_{h} = c t$ using Cosmic Chronometers

arXiv:2003.00494 · doi:10.1140/epjc/s10052-020-8289-8

Abstract

In 2012, Bilicki and Seikel (arXiv:1206.5130) showed that $H (z)$ data reconstructed using Gaussian Process Regression from cosmic chronometers and BAO, conclusively rules out the $R_{h} = c t$ model. These results were disputed by Melia and collaborators in two different works (arXiv:1304.1802 and arXiv:1802.02255), who showed using both an unbinned analysis and Gaussian Process reconstructed $H (z)$ data from chronometers, that $R_{h} = c t$ is favored over $Λ$ CDM model. To resolve this imbroglio, we carry out model comparison of $Λ$ CDM versus $R_{h} = c t$ by independently reproducing the above claims using latest chronometer data. We perform model selection between these two models using Bayesian model comparison. We find that no one model between $Λ$ CDM and $R_{h} = c t$ is decisively favored when uniform priors on $Λ$ CDM parameters are used. However, if we use priors centered around the Planck best-fit values, then $Λ$ CDM is very strongly preferred over $R_{h} = c t$ .

arXiv comment9 pages, 3 figures

Model Comparison of $Λ$ CDM vs $R_{h} = c t$ using Cosmic Chronometers

Abstract

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Model Comparison of ΛCDM vs Rh​=ct using Cosmic Chronometers

Abstract

References in corpus (70)

Cited by in corpus (27)

Model Comparison of $Λ$ CDM vs $R_{h} = c t$ using Cosmic Chronometers