Regular Article - Theoretical Physics
Model comparison of CDM vs using cosmic chronometers
Department of Physics, Indian Institute of Technology, Hyderabad, Telangana, 502285, India
* e-mail: email@example.com
Accepted: 25 July 2020
Published online: 2 August 2020
In 2012, Bilicki and Seikel (Mon Not R Astron Soc 425:1664, 2012) showed that H(z) data reconstructed using Gaussian Process Regression from cosmic chronometers and baryon acoustic oscillations, conclusively rules out the model. These results were disputed by Melia and collaborators in two different works (Melia and Maier in Mon Not R Astron Soc 432:2669, 2013; Melia and Yennapureddy in JCAP 2018:034, 2018), who showed using both an unbinned analysis and Gaussian Process reconstructed H(z) data from chronometers, that is favored over CDM model. To resolve this imbroglio, we carry out model comparison of CDM versus by independently reproducing the above claims using the latest chronometer data. We perform model selection between these two models using Bayesian model comparison. We find that no one model between CDM and is decisively favored when uniform priors on CDM parameters are used. However, if we use priors centered around the Planck best-fit values, then CDM is very strongly preferred over .
© The Author(s), 2020