Dark energy in light of recent DESI BAO and Hubble tension
arxiv(2024)
摘要
It might be necessary to access the impact of recent released Dark Energy
Spectroscopic Instrument (DESI) data on the state equation of dark energy in
the Hubble-tension-free cosmologies. In this paper, we report the MCMC analysis
for the w_0w_aCDM model with pre-recombination early dark energy (EDE) using
Planck+DESI+Pantheon+SH0ES dataset. The results reveal that H_0=72.43±
0.75, w_0=-0.971±0.035, w_a=-0.347±0.120 for axion-like EDE, while
H_0=73.32± 0.64, w_0=-0.923±0.054, w_a=-0.435±0.132 for AdS-EDE,
and also not surprisingly the spectral index of primordial scalar perturbation
moves towards n_s=1. It looks like that in corresponding models the bestfit
H_0 are higher than those with pre-DESI BAO data, but without the further
exacerbation of S_8 tension.
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