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• W3105931013 endingPage "019" @default.
• W3105931013 startingPage "019" @default.
• W3105931013 abstract "We investigate the observational consequences of a novel class of stable interacting dark energy (IDE) models, featuring interactions between dark matter (DM) and dark energy (DE). In the first part of our work, we start by considering two IDE models which are known to present early-time linear perturbation instabilities. Applying a transformation depending on the dark energy equation of state (EoS) to the DM-DE coupling, we then obtain two novel stable IDE models. Subsequently, we derive robust and accurate constraints on the parameters of these models, assuming a constant EoS wx for the DE fluid, in light of some of the most recent publicly available cosmological data. These include Cosmic Microwave Background (CMB) temperature and polarization anisotropy measurements from the Planck satellite, a selection of Baryon Acoustic Oscillation measurements, Supernovae Type-Ia luminosity distance measurements from the JLA sample, and measurements of the Hubble parameter up to redshift 2 from cosmic chronometers. Our analysis displays a mild preference for the DE fluid residing in the phantom region (wx<−1), with significance up to 95% confidence level, while we obtain new upper limits on the coupling parameter between the dark components. The preference for a phantom DE suggests a coupling function 0Q<, thus a scenario where energy flows from the DE to the DM . We also examine the possibility of addressing the H0 and σ8 tensions, finding that only the former can be partially alleviated. Finally, we perform a Bayesian model comparison analysis to quantify the possible preference for the two IDE models against the standard concordance ΛCDM model, finding that the latter is always preferred with the strength of the evidence ranging from positive to very strong." @default.
• W3105931013 created "2020-11-23" @default.
• W3105931013 creator A5015730413 @default.
• W3105931013 creator A5032140571 @default.
• W3105931013 creator A5042584133 @default.
• W3105931013 creator A5048780307 @default.
• W3105931013 creator A5083749517 @default.
• W3105931013 creator A5086929880 @default.
• W3105931013 date "2018-09-11" @default.
• W3105931013 modified "2023-10-11" @default.
• W3105931013 title "Tale of stable interacting dark energy, observational signatures, and the <i>H</i>₀ tension" @default.
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