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Background dynamics and observational constraints of spatially flat and non-flat Λ(t)CDM models from H(z) and DESI DR2 BAO measurements

Context. Dynamical vacuum models provide a minimal phenomenological extension of the standard Λ cold dark matter (ΛCDM) model in which the vacuum energy density evolves with cosmic time, potentially affecting late-time expansion. Aims. We investigated the background evolution of spatially flat and n...

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Hovedforfatter: Avsajanishvili Olga
Format: Artigo
Sprog:Inglês
Udgivet: EDP Sciences 2026-06-01
Serier:Astronomy & Astrophysics
Fag:
cosmological parameters
cosmology: observations
cosmology: theory
dark energy
Online adgang:https://www.aanda.org/articles/aa/full_html/2026/06/aa59718-26/aa59718-26.html
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