Robust preference for Dynamical Dark Energy in DESI BAO and SN measurements
University of Sheffield · K.N.Toosi University of Technology · +3 more institutions
Abstract
Abstract Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when combined with Cosmic Microwave Background (CMB) data from Planck and two different samples of Type Ia supernovae (Pantheon-Plus and DESY5) reveal a preference for Dynamical Dark Energy (DDE) characterized by a present-day quintessence-like equation of state that crossed into the phantom regime in the past. A core ansatz for this result is assuming a linear Chevallier-Polarski-Linder (CPL) parameterization w ( a ) = w 0 + w a (1- a ) to describe the evolution of the DE equation of state (EoS). In this paper, we test if and to what extent this assumption impacts the results. To prevent broadening uncertainties in cosmological…
Citation impact
- FWCI
- 39.56
- Percentile
- 100%
- References
- 493
Authors
5- WGWilliam GiarèCorresponding
University of Sheffield
- MNMahdi Najafi
K.N.Toosi University of Technology
- SPSupriya Pan
Presidency University, Durban University of Technology
- EDEleonora Di Valentino
University of Sheffield
- JTJavad T. Firouzjaee
Institute for Research in Fundamental Sciences, K.N.Toosi University of Technology
Topics & keywords
- Quintessence
- Dark energy
- Physics
- Cosmic microwave background
- Baryon acoustic oscillations
- Ansatz
- Equation of state
- Planck