Effects of anisotropy in an anisotropic extension of $w$CDM model
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866910603047600128 |
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| author | Yadav, Vikrant Yadav, Santosh Kumar Rajpal |
| author_facet | Yadav, Vikrant Yadav, Santosh Kumar Rajpal |
| contents | In this paper, we derive observational constraints on an anisotropic $w$CDM model from observational data including Baryonic Acoustic Oscillations (BAOs), Cosmic Chronometer (CC), Big Bang Nucleosynthesis (BBN), Pantheon Plus (PP) compilation of Type Ia supernovae, and SH0ES Cepheid host distance anchors. We find that anisotropy is of the order $10^{-13}$, and its presence in the $w$CDM model reduces $H_0$ tension by $\sim 2σ$ and $\sim 1σ$ in the analyses with BAO+CC+BBN+PP and BAO+CC+BBN+PPSH0ES data combinations, respectively. In both analyses, the quintessence form of dark energy is favored at 95\% CL. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_16885 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effects of anisotropy in an anisotropic extension of $w$CDM model Yadav, Vikrant Yadav, Santosh Kumar Rajpal Cosmology and Nongalactic Astrophysics In this paper, we derive observational constraints on an anisotropic $w$CDM model from observational data including Baryonic Acoustic Oscillations (BAOs), Cosmic Chronometer (CC), Big Bang Nucleosynthesis (BBN), Pantheon Plus (PP) compilation of Type Ia supernovae, and SH0ES Cepheid host distance anchors. We find that anisotropy is of the order $10^{-13}$, and its presence in the $w$CDM model reduces $H_0$ tension by $\sim 2σ$ and $\sim 1σ$ in the analyses with BAO+CC+BBN+PP and BAO+CC+BBN+PPSH0ES data combinations, respectively. In both analyses, the quintessence form of dark energy is favored at 95\% CL. |
| title | Effects of anisotropy in an anisotropic extension of $w$CDM model |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2402.16885 |