Bayesian Model Comparison of $R_h=ct$ versus $Λ$CDM using HII galaxy Hubble diagram
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866908926130257920 |
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| author | Pallam, Yuva Himanshu Desai, Shantanu |
| author_facet | Pallam, Yuva Himanshu Desai, Shantanu |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_28019 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Bayesian Model Comparison of $R_h=ct$ versus $Λ$CDM using HII galaxy Hubble diagram Pallam, Yuva Himanshu Desai, Shantanu Cosmology and Nongalactic Astrophysics 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. |
| title | Bayesian Model Comparison of $R_h=ct$ versus $Λ$CDM using HII galaxy Hubble diagram |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2603.28019 |