Interacting Dark Energy after DESI Baryon Acoustic Oscillation Measurements
Year: 2024
Type: article
Abstract: We investigate the implications of the baryon acoustic oscillations measurement released by the Dark Energy Spectroscopic Instrument for interacting dark energy (IDE) models characterized by an energy-momentum flow from dark matter to dark energy. By combining Planck-2018 and Dark Energy Spectroscopic Instrument data, we observe a preference for interactions, leading to a nonvanishing interaction rate ξ=-0.32_{-0.14}^{+0.18}, which results in a present-day expansion rate H_{0}=70.8_{-1.7}^{+1.4} km/s/Mpc, reducing the tension with the value provided by the SH0ES Collaboration to less than ∼1.3σ. The preference for interactions remains robust when including measurements of the expansion rate H(z) obtained from the relative ages of massive, early-time, and passively evolving galaxies, as well as when considering distance moduli measurements from Type Ia supernovae sourced from the Pantheon-plus catalog using the SH0ES Cepheid host distances as calibrators. Overall, the IDE framework provides an equally good, or better, explanation of both high- and low-redshift background observations compared to the lambda cold dark matter model, while also yielding higher H_{0} values that align more closely with the local distance ladder estimates. However, a limitation of the IDE model is that it predicts lower Ω_{m} and higher σ_{8} values, which may not be fully consistent with large-scale structure data at the perturbation level.
Source: Physical Review Letters
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: University of Sheffield, European Cooperation in Science and Technology, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Science and Technology Facilities Council
OpenAlex ID: W4405526361