AI Article Synopsis
- Axionlike early dark energy (EDE) is being examined as a solution to the "Hubble tension" affecting the standard Λ cold dark matter (ΛCDM) model.
- A new analysis using the Planck NPIPE data shows that EDE contributes a maximum of 6.1% to the total energy density and estimates the Hubble constant to be between 66.9 and 69.5 km/s/Mpc.
- Despite some residual tension (3.7σ) with measurements from the SH0ES project, the findings support a model similar to ΛCDM and show no significant evidence for a large EDE component.
Article Abstract
Axionlike early dark energy (EDE) as an extension to Λ cold dark matter (ΛCDM) has been proposed as a possible solution to the "Hubble tension." We revisit this model using a new cosmic microwave background (CMB) temperature and polarization likelihood constructed from the Planck NPIPE data release. In a Bayesian analysis, we find that the maximum fractional contribution of EDE to the total energy density is f_{EDE}<0.061 (without SH0ES) over the redshift range z∈[10^{3},10^{4}] and that the Hubble constant is constrained to lie within the range 66.9
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http://dx.doi.org/10.1103/PhysRevLett.132.221002 DOI Listing Publication Analysis
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