论文标题
$λ$ cdm vs $ r_h = CT $使用宇宙计时器的型号比较
Model Comparison of $Λ$CDM vs $R_h=ct$ using Cosmic Chronometers
论文作者
论文摘要
2012年，Bilicki和Seikel（Arxiv：1206.5130）表明，$ H（Z）$数据使用宇宙天文钟和BAO的高斯过程回归重建，最终排除了$ R_H = CT $模型。梅利亚（Melia）和合作者在两项不同的作品（ARXIV：1304.1802和ARXIV：1802.02255）中提出了这些结果，他们同时使用了一个未锁定的分析和Gaussian Process Recoussed $ h（z）$数据，来自Chronometers的数据，来自$ R_H = CT $ ct $比$λ$ CDM模型受到青睐。为了解决这个Imbroglio，我们通过使用最新的Chronometer数据独立再现上述索赔来进行$λ$ CDM与$ r_h = CT $的模型比较。我们使用贝叶斯模型比较在这两个模型之间进行模型选择。我们发现，当使用$λ$ CDM参数上的均匀先验时，没有一个模型在$λ$ CDM和$ r_H = CT $之间是果断的。但是，如果我们使用以普朗克最佳拟合值为中心的先验，则$λ$ CDM非常优选$ r_h = CT $。
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 $R_h=ct$ 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 $R_h=ct$ is favored over $Λ$CDM model. To resolve this imbroglio, we carry out model comparison of $Λ$CDM versus $R_h=ct$ 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 $R_h=ct$ 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 $R_h=ct$.
