articleJournal of Cosmology and Astroparticle PhysicsJan 1, 2025GREEN OA

Model-agnostic assessment of dark energy after DESI DR1 BAO

BRBikash R. DindaRMRoy Maartens

University of the Western Cape · National Institute for Theoretical Physics · +1 more institution

Indexed inarxivcrossref

Abstract

Abstract Baryon acoustic oscillation measurements by the Dark Energy Spectroscopic Instrument (Data Release 1) have revealed exciting results that show evidence for dynamical dark energy at ∼ 3 σ when combined with cosmic microwave background and type Ia supernova observations. These measurements are based on the w 0 w a CDM model of dark energy. The evidence is less in other dark energy models such as the w CDM model. In order to avoid imposing a dark energy model, we reconstruct the distance measures and the equation of the state of dark energy independent of any dark energy model and driven only by observational data. Our results show that the model-agnostic (in terms of late-time models) evidence for…

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Topics & keywords

Topics
Keywords
  • Physics
  • Dark energy
  • Dark matter
  • Energy (signal processing)
  • Astrophysics
  • Cosmology
  • Quantum mechanics
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