Consistency tests between SDSS and DESI BAO measurements

Abstract

In this work, we investigate whether the baryon acoustic oscillation (BAO) measurements from redshift surveys, like the Sloan Digital Sky Survey (SDSS), and the Dark Energy Spectroscopic Instrument (DESI), are consistent with each other. We do so by obtaining the Hubble and deceleration parameter, respectively $H(z)$ and $q(z)$, from both datasets using a non-parametric reconstruction, so that our results do not depend on any $\text{a priori}$ assumptions about the underlying cosmological model. We find that the reconstructed $H(z)$ and $q(z)$ from SDSS are significantly inconsistent with those obtained from DESI, and that both are only marginally consistent with the $\Lambda$CDM model ($\sim 3\sigma$ confidence level). Interestingly, the combined SDSS and DESI dataset reconciles with the standard model. These results are mostly unchanged with respect to different assumptions on the sound horizon scale value, as well as different reconstruction kernels. We also verify the results for the null diagnostic ${\mathcal{O}}_{\mathrm{m}}(z)$, finding that they suggest different trends for dark energy models using DESI and SDSS BAO measurements, and once again the combined dataset strongly agrees with $\Lambda$CDM. Therefore, our results call the attention for further examination of such inconsistency, as they can lead to biased and divergent results regarding the validity of the standard model, or the suggestion of new physics.

19 pages, 8 figures, Published in Physics of the Dark Universe, minor corrections updated in this version

References in corpus (29)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The Pantheon+ Analysis: Cosmological Constraints
• Challenges for $\Lambda$CDM: An update
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Two new diagnostics of dark energy
• New physics in light of the $H_0$ tension: an alternative view
• Reconstruction of dark energy and expansion dynamics using Gaussian processes
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the Quasar Sample in configuration space between redshift 0.8 and 2.2
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
• Gaussian Process Cosmography
• $H_0$ Tension, Phantom Dark Energy and Cosmological Parameter Degeneracies
• A litmus test for Lambda
• Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
• Using H(z) data as a probe of the concordance model
• Evidence for a Lower Value for $H_0$ from Cosmic Chronometers Data?
• Underdetermination of dark energy
• Quintom cosmology and modified gravity after DESI 2024
• Model independent constraints on the cosmological expansion rate
• A data-driven Reconstruction of Horndeski gravity via the Gaussian processes
• Evidence for cosmic acceleration with next-generation surveys: A model-independent approach
• Linear Point and Sound Horizon as Purely Geometric standard rulers
• Towards a possible solution to the Hubble tension with Horndeski gravity
• The Linear Point: A cleaner cosmological standard ruler
• Cosmological forecasts for future galaxy surveys with the linear point standard ruler: Toward consistent BAO analyses far from a fiducial cosmology
• Testing the cosmic distance duality relation with Type Ia supernova and transverse BAO measurements
• Reconstructing the growth index $\gamma$ with Gaussian Processes

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• Is the $w_0{w}_a$CDM cosmological parameterization evidence for dark energy dynamics partially caused by the excess smoothing of Planck CMB anisotropy data?
• Cosmological constraints on Galileon dark energy with broken shift symmetry
• Cosmological constraints on dark energy models using DESI BAO 2024
• Constraints on Dark Energy Models Using Late Universe Probes
• Null tests with Gaussian Process
• Quintessential Implications of the presence of AdS in the Dark Energy sector
• Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
• Model-Agnostic Cosmological Inference with SDSS-IV eBOSS: Simultaneous Probing for Background and Perturbed Universe
• Cosmic acceleration and the Hubble tension from baryon acoustic oscillation data