Running Hubble constant: evolutionary Dark Energy
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913685780299776 |
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| author | Montani, Giovanni Carlevaro, Nakia Dainotti, Maria G. |
| author_facet | Montani, Giovanni Carlevaro, Nakia Dainotti, Maria G. |
| contents | We discuss an evolutionary dark energy model, based on the presence of non-equilibrium effects on the dark energy constituents, which are described via a bulk viscosity contribution. We implement the proposed dynamics by the analysis of the 40-bins Type Ia Supernovae (SNe) Pantheon sample data, in order to outline the existence of a running Hubble constant with the redshift. Via a fitting procedure, we determine the value of the additional parameter that our model possesses with respect a standard $Λ$ Cold Dark Matter ($Λ$CDM) scenario. As important result, the evolutionary dark energy proposal seems more appropriate to describe the binned SN analysis with respect to the $Λ$CDM Hubble parameter, i.e. a non running value for the Hubble constant over the bins. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_07060 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Running Hubble constant: evolutionary Dark Energy Montani, Giovanni Carlevaro, Nakia Dainotti, Maria G. General Relativity and Quantum Cosmology We discuss an evolutionary dark energy model, based on the presence of non-equilibrium effects on the dark energy constituents, which are described via a bulk viscosity contribution. We implement the proposed dynamics by the analysis of the 40-bins Type Ia Supernovae (SNe) Pantheon sample data, in order to outline the existence of a running Hubble constant with the redshift. Via a fitting procedure, we determine the value of the additional parameter that our model possesses with respect a standard $Λ$ Cold Dark Matter ($Λ$CDM) scenario. As important result, the evolutionary dark energy proposal seems more appropriate to describe the binned SN analysis with respect to the $Λ$CDM Hubble parameter, i.e. a non running value for the Hubble constant over the bins. |
| title | Running Hubble constant: evolutionary Dark Energy |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2411.07060 |