On the consistency of $\Lambda$CDM with CMB measurements in light of the latest Planck, ACT, and SPT data

Abstract

Using Gaussian Processes we perform a thorough, non-parametric consistency test of the $\Lambda$CDM model when confronted with state-of-the-art TT, TE, and EE measurements of the anisotropies in the Cosmic Microwave Background by the Planck, ACT, and SPT collaborations. Using $\Lambda$CDM's best-fit predictions to the TTTEEE data from Planck, we find no statistically significant deviations when looking for signatures in the residuals across the different datasets. The results of SPT are in good agreement with the $\Lambda$CDM best-fit predictions to the Planck data, while the results of ACT are only marginally consistent. However, when using the best-fit predictions to CamSpec -- a recent reanalysis of the Planck data -- as the mean function, we find larger discrepancies between the datasets. Our analysis also reveals an interesting feature in the polarisation (EE) measurements from the CamSpec analysis, which could be explained by a slight underestimation of the covariance matrix. Interestingly, the disagreement between CamSpec and Planck/ACT is mainly visible in the residuals of the TT spectrum, the latter favoring a scale-invariant tilt $n_s\simeq 1$, which is consistent with previous findings from parametric analyses. We also report some features in the EE measurements captured both by ACT and SPT which are independent of the chosen mean function and could be hinting towards a common physical origin. For completeness, we repeat our analysis using the best-fit spectra to ACT+WMAP as the mean function. Finally, we test the internal consistency of the Planck data alone by studying the high and low-$\ell$ ranges separately, finding no discrepancy between small and large angular scales.

28 pages, 17 figures. Published in JCAP

References in corpus (53)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• In the Realm of the Hubble tension $-$ a Review of Solutions
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Challenges for $\Lambda$CDM: An update
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
• Planck evidence for a closed Universe and a possible crisis for cosmology
• Cosmology Intertwined II: The Hubble Constant Tension
• The $H_0$ Olympics: A fair ranking of proposed models
• Cosmology Intertwined III: $f{\sigma }_8$ and $S_8$
• CMB-S4 Science Case, Reference Design, and Project Plan
• Early Dark Energy Does Not Restore Cosmological Concordance
• Gaussian Process Cosmography
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz
• Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data
• Constraining Early Dark Energy with Large-Scale Structure
• CMB power spectra and cosmological parameters from Planck PR4 with CamSpec
• Relieving the Hubble tension with primordial magnetic fields
• Why reducing the cosmic sound horizon alone can not fully resolve the Hubble tension
• A non-linear solution to the $S_8$ tension?
• Early dark energy is not excluded by current large-scale structure data
• Investigating Cosmic Discordance
• The Hubble Tension in Light of the Full-Shape Analysis of Large-Scale Structure Data
• Early dark energy resolution to the Hubble tension in light of weak lensing surveys and lensing anomalies
• KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs
• The Atacama Cosmology Telescope: Constraints on Pre-Recombination Early Dark Energy
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• Dark Energy at early times and ACT: a larger Hubble constant without late-time priors
• Early recombination as a solution to the $H_0$ tension
• Negative cosmological constant in the dark sector?
• Can late-time extensions solve the $H_0$ and ${\sigma }_8$ tensions?
• Implication of the Hubble tension for the primordial Universe in light of recent cosmological data
• New Early Dark Energy is compatible with current LSS data
• Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data
• Quantifying the global parameter tensions between ACT, SPT and Planck
• Towards early dark energy and $n_s$=1 with Planck, ACT and SPT
• Updated constraints from the effective field theory analysis of BOSS power spectrum on Early Dark Energy
• The trouble beyond $H_0$ and the new cosmic triangles
• How to use GP: Effects of the mean function and hyperparameter selection on Gaussian Process regression
• Revealing the effects of curvature on the cosmological models
• Explaining Cosmological Anisotropy: Evidence for Causal Horizons from CMB data
• Health checkup test of the standard cosmological model in view of recent Cosmic Microwave Background Anisotropies experiments
• Directional Variations of Cosmological Parameters from the Planck CMB Data
• Is the Harrison-Zel'dovich spectrum coming back? ACT preference for $n_s\sim 1$ and its discordance with Planck
• Return of Harrison-Zeldovich spectrum in light of recent cosmological tensions
• Consistency of Planck, ACT and SPT constraints on magnetically assisted recombination and forecasts for future experiments
• One spectrum to cure them all: Signature from early Universe solves major anomalies and tensions in cosmology
• Quantifying the global "CMB tension" between the Atacama Cosmology Telescope and the Planck satellite in extended models of cosmology
• A grounded perspective on New Early Dark Energy using ACT, SPT, and BICEP/Keck
• Discordances in cosmology and the violation of slow-roll inflationary dynamics
• Joint reconstructions of growth and expansion histories from stage-IV surveys with minimal assumptions. II. Modified gravity and massive neutrinos
• Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data
• The cosmological lithium problem, varying constants and the $H_0$ tension

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