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Running Hubble constant: evolutionary Dark Energy
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abstract
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 $\Lambda$ Cold Dark Matter ($\Lambda$CDM) scenario. As important result, the evolutionary dark energy proposal seems more appropriate to describe the binned SN analysis with respect to the $\Lambda$CDM Hubble parameter, i.e. a non running value for the Hubble constant over the bins.
Forward citations
Cited by 6 Pith papers
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Interpretation of the binned SNe Ia Master Sample data via a scalar quintessence component: phantom transition?
Viscous quintessence model fitted to binned SNe Ia data shows no phantom transition and lower transition redshift than DESI.
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Effect of Peak Absolute Magnitude of Type Ia Supernovae and Sound Horizon Values on Hubble Tension using DESI results
Using DESI DR1, Pantheon+ and cosmic chronometer data, the authors show that changing the Type Ia supernova absolute magnitude and sound-horizon priors moves the inferred H0 from about 73 to 68 km/s/Mpc, reducing the ...
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