Year: 2024
Type: article
Abstract: We investigated a possible interaction between cold dark matter and dark energy, corresponding to a well-known interacting dark energy model discussed in the literature within the context of resolving the Hubble tension. We put constraints on it in a novel way, by creating new likelihoods with an analytical marginalization over the Hubble parameter H0, the sound horizon rd, and the supernova absolute magnitude MB. Our aim is to investigate the impacts on the coupling parameter of the interacting model, ξ, and the equation of state of dark energy w and the matter density parameter Ωm, 0. The late-time cosmological probes used in our analysis include the PantheonPlus (calibrated and uncalibrated), cosmic chronometers, and baryon acoustic oscillation samples and the Pantheon for comparison. Through various combinations of these datasets, we demonstrate hints of an up to 2σ deviation from the standard Λ cold dark matter model.
Authors: David Benisty, Supriya Pan, Denitsa Staicova, Eleonora Di Valentino, Rafael C. Nunes
Institutions: University of Helsinki, Helsinki Institute of Physics, Frankfurt Institute for Advanced Studies, Presidency University, Durban University of Technology, Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, Universidade Federal do Rio Grande do Sul, Instituto Nacional de Pesquisas Espaciais
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1518877191, G177338994, G406199537, G613609579
OpenAlex ID: W6922078902
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