Papers › Combined analysis of Planck and SPTPol data favors the early dark energy models
Combined analysis of Planck and SPTPol data favors the early dark energy models
Anton Chudaykin, Dmitry Gorbunov, Nikita Nedelko
The archive published only this paper's code-link row. Authors, date and abstract are from arXiv's metadata (CC0), read from the Kaggle arXiv metadata snapshot of 2026-09-12 where its title matched the archive's; the title is the archive's.
We study the implications of the Planck temperature power spectrum at low multipoles, ℓ<1000, and SPTPol data. We show that this combination predicts consistent lensing-induced smoothing of acoustic peaks within ΛCDM cosmology and yields the robust predictions of the cosmological parameters. Combining only the Planck large-scale temperature data and the SPTPol polarization and lensing measurements within ΛCDM model we found substantially lower values of linear matter density perturbation σ₈ which bring the late-time parameter S₈=σ₈√(Ωₘ/0.3)=0.763±0.022 into accordance with galaxy clustering and weak lensing measurements. It also raises up the Hubble constant H₀=69.68±1.00 km s⁻¹Mpc⁻¹ that reduces the Hubble tension to the 2.5σ level. We examine the residual tension in the Early Dark Energy (EDE) model which produces the brief energy injection prior to recombination. We implement both the background and perturbation evolutions of the scalar field which potential scales as V(ϕ)∝ϕ²ⁿ. Including cosmic shear measurements (KiDS, VIKING-450, DES) and local distance-ladder data (SH0ES) to the combined fit we found that EDE completely alleviates the Hubble tension while not degradating the fit to large-scale structure data. The EDE scenario significantly improves the goodness-of-fit by 2.9σ in comparison with the concordance ΛCDM model. The account for the intermediate-redshift data (the supernova dataset and baryon acoustic oscillation data) fits perfectly to our parameter predictions and indicates the preference of EDE over ΛCDM at 3σ.
Code
Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Results from the paper archive 2025-07-28
No leaderboard rows for this paper in the archive.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections