A Case for an Inhomogeneous Einstein-de Sitter Universe
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910002841649152 |
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| author | Raffai, Peter Kis, Dominika E. R. Ködmön, Dávid A. Pataki, Adrienn Böttger, Rebeka L. Dálya, Gergely |
| author_facet | Raffai, Peter Kis, Dominika E. R. Ködmön, Dávid A. Pataki, Adrienn Böttger, Rebeka L. Dálya, Gergely |
| contents | We present a local-to-global cosmological framework in which cosmic acceleration emerges from structure formation in an inhomogeneous Einstein-de Sitter (iEdS) universe, without dark energy. The model exhibits a quasilinear coasting evolution toward an effective Milne state driven by growing inhomogeneities. We test the iEdS model with ${H_0=72.5\ \mathrm{km\ s^{-1}\ Mpc^{-1}}}$ and ${Ω_{\mathrm{m},0}=0.272}$ using CMB, BAO, and SN Ia data. The iEdS model fits the data comparably to $Λ$CDM and resolves the $H_0$ tension, while yielding a cosmic age ${t_0\simeq 13.67\ \mathrm{Gyr}}$ consistent with globular-cluster estimates. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_03288 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Case for an Inhomogeneous Einstein-de Sitter Universe Raffai, Peter Kis, Dominika E. R. Ködmön, Dávid A. Pataki, Adrienn Böttger, Rebeka L. Dálya, Gergely Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We present a local-to-global cosmological framework in which cosmic acceleration emerges from structure formation in an inhomogeneous Einstein-de Sitter (iEdS) universe, without dark energy. The model exhibits a quasilinear coasting evolution toward an effective Milne state driven by growing inhomogeneities. We test the iEdS model with ${H_0=72.5\ \mathrm{km\ s^{-1}\ Mpc^{-1}}}$ and ${Ω_{\mathrm{m},0}=0.272}$ using CMB, BAO, and SN Ia data. The iEdS model fits the data comparably to $Λ$CDM and resolves the $H_0$ tension, while yielding a cosmic age ${t_0\simeq 13.67\ \mathrm{Gyr}}$ consistent with globular-cluster estimates. |
| title | A Case for an Inhomogeneous Einstein-de Sitter Universe |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2511.03288 |