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arXiv 2603.28019astro-ph.CO
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基于HII星系哈勃图的$R_h=ct$与$Λ$CDM的贝叶斯模型比较

Bayesian Model Comparison of $R_h=ct$ versus $Λ$CDM using HII galaxy Hubble diagram

BITS Pilani - Hyderabad Campus(印度理工学院海德拉巴分校);IIT Hyderabad(印度理工学院海德拉巴分校)

Yuva Himanshu Pallam, Shantanu Desai

AI总结:

本文通过贝叶斯模型比较,分析$R_h=ct$与$Λ$CDM/$w$CDM在HII星系和巨外星系HII区域数据集中的优劣,发现基于普朗克宇宙学的正态先验下,$R_h=ct$对$Λ$CDM有显著优势,对$w$CDM则边缘优势。

摘要:

我们补充了近期利用HII星系和巨外星系HII区域数据集比较$R_h=ct$与$Λ$CDM/$w$CDM的分析,通过计算贝叶斯因子进行模型比较。使用统一的宇宙学参数先验时,发现$R_h=ct$与$Λ$CDM/$w$CDM的贝叶斯因子接近1,表明两者被同等青睐。然而,基于普朗克宇宙学的正态先验时,$R_h=ct$在$Λ$CDM上具有显著优势,在$w$CDM上则边缘优势。

英文摘要:

We complement a recent analysis comparing $R_\mathrm{h}=ct$ with $Λ$CDM/$w$CDM using HII galaxies and giant extragalactic HII regions, by carrying out Bayesian model comparison. For this purpose, we calculate the Bayes factors for $R_\mathrm{h}=ct$ compared to flat $Λ$CDM/$w$CDM using the same dataset. When we use uniform priors on cosmological parameters, we find that the Bayes factors are close to 1, implying that $R_\mathrm{h}=ct$ is equally favored compared to $Λ$CDM/$w$CDM. However, when we use normal priors on cosmological parameters based on Planck cosmology, we find that $R_\mathrm{h}=ct$ is strongly favored over flat $Λ$CDM, while $R_\mathrm{h}=ct$ is marginally favored over flat $w$CDM.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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