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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2506.15739 |
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| _version_ | 1866917402249265152 |
|---|---|
| author | Yang, Rong-Jia |
| author_facet | Yang, Rong-Jia |
| contents | We analyze DESI DR2 data with a model-independent method and find that: (a) the expansion of the universe may speed up with a confidence level more than 2.3 $σ$ at redshift $z_{51}\in (0.51, 0.955)$; (b) the expansion of the universe may speed down with a confidence level greater than 1.7 $σ$ at redshift $z_{75}\in (0.955, 1.484)$; (c) $w_{\rm{x}}\leq w_{\rm{t}}<-1$ with confidence level exceeding 1.6 $σ$ at redshift $z_{53}\in (0.922, 0.955)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15739 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Possible evidences for physics beyond $Λ$CDM from DESI DR2 data Yang, Rong-Jia General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics We analyze DESI DR2 data with a model-independent method and find that: (a) the expansion of the universe may speed up with a confidence level more than 2.3 $σ$ at redshift $z_{51}\in (0.51, 0.955)$; (b) the expansion of the universe may speed down with a confidence level greater than 1.7 $σ$ at redshift $z_{75}\in (0.955, 1.484)$; (c) $w_{\rm{x}}\leq w_{\rm{t}}<-1$ with confidence level exceeding 1.6 $σ$ at redshift $z_{53}\in (0.922, 0.955)$. |
| title | Possible evidences for physics beyond $Λ$CDM from DESI DR2 data |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2506.15739 |