Measuring the reionization optical depth without large-scale CMB polarization

Abstract

We study the possibility of measuring the optical depth at reionization, $\tau$, without relying on large-scale Cosmic Microwave Background (CMB) polarization. Our analysis is driven by the need to obtain competitive measurements that can validate the state-of-the-art constraints on this parameter, widely based on E-mode polarization measurements at $\ell \le 30$. This need is partially motivated by the typical concerns regarding anomalies observed in the Planck large-scale CMB data as well as by the remarkable fact that, excluding these latter, $\tau$ consistently exhibits correlations with anomalous parameters, such as $A_{\mathrm{lens}}$ and ${\Omega }_k$, suggesting that slightly higher values of the optical depth at reionization could significantly alleviate or even eliminate anomalies. Within the $\Lambda$CDM model, our most constraining result is $\tau =0.080\pm 0.012$, obtained by combining Planck temperature and polarization data at $\ell >30$, the Atacama Cosmology Telescope (ACT) and Planck measurements of the lensing potential, Baryon Acoustic Oscillations (BAO), and Type-Ia supernova data from the Pantheon+ catalogue. Notably, using only ACT temperature, polarization, and lensing data in combination with BAO and supernovae, we obtain $\tau =0.076\pm 0.015$, which is entirely independent of Planck. The relative precision of these results is approaching the constraints based on large-scale CMB polarization ($\tau =0.054\pm 0.008$). Despite the overall agreement, we report a slight $1.8\sigma$ shift towards larger values of $\tau$. We also test how these results change by extending the cosmological model. While in many extensions they remain robust, in general obtaining precise measurements of $\tau$ may become significantly more challenging.

arXiv comment24 pages, 7 Figures, 13 Tables. V2: version accepted for publication in PRD

References in corpus (165)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Planck 2015 results. XIII. Cosmological parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Planck 2013 results. XVI. Cosmological parameters
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from SDSS and WMAP
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• 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
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• In the Realm of the Hubble tension $-$ a Review of Solutions
• The James Webb Space Telescope
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• In the Beginning: The First Sources of Light and the Reionization of the Universe
• The Pantheon+ Analysis: Cosmological Constraints
• Tensions between the Early and the Late Universe
• Planck 2018 results. V. CMB power spectra and likelihoods
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Sky Maps, Systematic Errors, and Basic Results
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
• Challenges for $\Lambda$CDM: An update
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Reionization and the abundance of galactic satellites
• Planck 2018 results. VIII. Gravitational lensing
• Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Effect of Reionization on the Structure Formation in the Universe
• The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
• Planck evidence for a closed Universe and a possible crisis for cosmology
• Planck 2013 results. XV. CMB power spectra and likelihood
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
• Cosmology Intertwined II: The Hubble Constant Tension
• A Comprehensive Study on Galaxies at z~9-16 Found in the Early JWST Data: UV Luminosity Functions and Cosmic Star-Formation History at the Pre-Reionization Epoch
• Reionization of the Universe and the Early Production of Metals
• Evolution of the Ionizing Background and the Epoch of Reionization from the Spectra of z~6 Quasars
• CEERS Key Paper I: An Early Look into the First 500 Myr of Galaxy Formation with JWST
• Model-independent evidence in favor of an end to reionization by z~6
• Reionization of the Inhomogeneous Universe
• Reionization and Cosmology with 21 cm Fluctuations
• Cosmological Parameter Estimation Using 21 cm Radiation from the Epoch of Reionization
• Efficient Simulations of Early Structure Formation and Reionization
• Cosmology Intertwined III: $f{\sigma }_8$ and $S_8$
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
• Destruction of Molecular Hydrogen During Cosmological Reionization
• Curvature tension: evidence for a closed universe
• Cosmological Reionization by Stellar Sources
• Directly Observing the Galaxies Likely Responsible for Reionization
• Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
• Cosmic Reionization after Planck: Could Quasars Do It All?
• Reconciling Planck with the local value of $H_0$ in extended parameter space
• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• Early star-forming galaxies and the reionization of the Universe
• What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
• The Reionization of the Universe by the First Stars and Quasars
• Early results from GLASS-JWST. III: Galaxy candidates at z$\sim$9-15
• Luminosity functions of Lyman-alpha emitters at z=6.5, and z=5.7: evidence against reionization at z=6
• A simulation calibrated limit on the HI power spectrum from the GMRT Epoch of Reionization experiment
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Testing gravity with redshift-space distortions using the power spectrum multipoles
• Stress Testing $\Lambda$CDM with High-redshift Galaxy Candidates
• New Measurements of the Ionizing Ultraviolet Background over 2 < z < 5 and Implications for Hydrogen Reionization
• Quantitative Constraints on the Reionization History from the IGM Damping Wing Signature in Two Quasars at z > 7
• Upper limits on the 21-cm Epoch of Reionization power spectrum from one night with LOFAR
• The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• New observations of z~7 galaxies: evidence for a patchy reionization
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz
• The South Pole Telescope
• Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data
• Reionization of Hydrogen and Helium by Early Stars and Quasars
• Large Lyman-alpha opacity fluctuations and low CMB tau in models of late reionization with large islands of neutral hydrogen extending to z<5.5
• PAPER-64 Constraints on Reionization: The 21cm Power Spectrum at z=8.4
• Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal
• The Star Formation Rate in the Reionization Era as Indicated by Gamma-ray Bursts
• Signatures of Stellar Reionization of the Universe
• The Reionization History at High Redshifts I: Physical Models and New Constraints from CMB Polarization
• Concordance and Discordance in Cosmology
• Early Reionization by the First Galaxies
• Probing reionization with Lyman-alpha emission lines
• Cosmic Microwave Weak lensing data as a test for the dark universe
• CMB power spectra and cosmological parameters from Planck PR4 with CamSpec
• Eppur è piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• Quantifying discordance in the 2015 Planck CMB spectrum
• The Thermal Memory of Reionization History
• Reionization Revisited: Secondary CMB Anisotropies and Polarization
• The evidence for a spatially flat Universe
• Cosmological parameters derived from the final (PR4) Planck data release
• The observable signature of late heating of the Universe during cosmic reionization
• Measurements of the Temperature and E-Mode Polarization of the CMB from 500 Square Degrees of SPTpol Data
• Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
• Constraints on Warm Dark Matter from Cosmological Reionization
• The Impact of Inhomogeneous Reionization on Cosmic Microwave Background Anisotropy
• Cosmic microwave background constraints on the duration and timing of reionization from the South Pole Telescope
• Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods
• Investigating Cosmic Discordance
• Probing the Reionization History of the Universe using the Cosmic Microwave Background Polarization
• Non-parametric spatial curvature inference using late-universe cosmological probes
• CEERS Key Paper V: A triality on the nature of HST-dark galaxies
• Reionization and cosmic microwave background distortions: a complete treatment of second order Compton scattering
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
• Updated Bounds on Sum of Neutrino Masses in Various Cosmological Scenarios
• Using Pantheon and DES supernova, baryon acoustic oscillation, and Hubble parameter data to constrain the Hubble constant, dark energy dynamics, and spatial curvature
• Using the tilted flat-$\Lambda$CDM and the untilted non-flat $\Lambda$CDM inflation models to measure cosmological parameters from a compilation of observational data
• Beyond six parameters: extending $\Lambda$CDM
• Dynamical dark energy after Planck CMB final release and $H_0$ tension
• 2021-$H_0$ Odyssey: Closed, Phantom and Interacting Dark Energy Cosmologies
• Interacting Dark Energy in a closed universe
• Reionization optical depth determination from Planck HFI data with ten percent accuracy
• Evidence for suppression of structure growth in the concordance cosmological model
• Constraints on $\Lambda$CDM Extensions from the SPT-3G 2018 $EE$ and $TE$ Power Spectra
• Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study
• Testing Late Time Cosmic Acceleration with uncorrelated Baryon Acoustic Oscillations dataset
• Cosmological Hints of Modified Gravity ?
• Quantifying the global parameter tensions between ACT, SPT and Planck
• CEERS Key Paper IV: Galaxies at $4<z<9$ are Bluer than They Appear -- Characterizing Galaxy Stellar Populations from Rest-Frame $\sim 1$ micron Imaging
• Early results from GLASS-JWST. XI: Stellar masses and mass-to-light ratio of z>7 galaxies
• Revealing the effects of curvature on the cosmological models
• Testing spatial curvature and anisotropic expansion on top of the $\Lambda$CDM model
• Quantifying concordance of correlated cosmological data sets
• Health checkup test of the standard cosmological model in view of recent Cosmic Microwave Background Anisotropies experiments
• Cosmological constraints on slow-roll inflation: an update
• High-redshift JWST Observations and Primordial Non-Gaussianity
• Is the Harrison-Zel'dovich spectrum coming back? ACT preference for $n_s\sim 1$ and its discordance with Planck
• A Bayesian interpretation of inconsistency measures in cosmology
• Cornering the Planck $A_{lens}$ tension with future CMB data
• Quantifying the global "CMB tension" between the Atacama Cosmology Telescope and the Planck satellite in extended models of cosmology
• Cosmic expansion parametrization: Implication for curvature and ${\text{H}}_0$ tension
• Constraining the spatial curvature with cosmic expansion history in a cosmological model with a non-standard sound horizon
• Model marginalized constraints on neutrino properties from cosmology
• A Short Introduction to Reionization Physics
• Inflationary Potential as seen from Different Angles: Model Compatibility from Multiple CMB Missions
• Planck residuals anomaly as a fingerprint of alternative scenarios to inflation
• Constraining spatial curvature with large-scale structure
• Constraining the X-ray heating and reionization using 21-cm power spectra with Marginal Neural Ratio Estimation
• On the consistency of $\Lambda$CDM with CMB measurements in light of the latest Planck, ACT, and SPT data
• A possible common explanation for several cosmic microwave background (CMB) anomalies: A strong impact of nearby galaxies on observed large-scale CMB fluctuations
• The cosmic shallows I: interaction of CMB photons in extended galaxy halos
• Deconstructing the Planck TT Power Spectrum to Constrain Deviations from $\Lambda$CDM
• POLAR -- I: linking the 21-cm signal from the epoch of reionization to galaxy formation
• Exploring the Growth Index ${\gamma }_L$: Insights from Different CMB Dataset Combinations and Approaches
• Lensing impact on cosmic relics and tensions
• Inference of the optical depth to reionization $\tau$ from $\text{Planck}$ CMB maps with convolutional neural networks
• Impact of the primordial fluctuation power spectrum on the reionization history

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• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data
• The state of the dark energy equation of state circa 2023
• Dynamical Dark Energy Beyond Planck? Constraints from multiple CMB probes, DESI BAO and Type-Ia Supernovae
• A double take on early and interacting dark energy from JWST
• Combining pre- and post-recombination new physics to address cosmological tensions: case study with varying electron mass and sign-switching cosmological constant
• Dispu$\tau$able: the high cost of a low optical depth
• Planck-PR4 anisotropy spectra show (better) consistency with General Relativity
• Neutrino mass tension or suppressed growth rate of matter perturbations?
• Constraints on the $z\sim 6-13$ intergalactic medium from JWST spectroscopy of Lyman-alpha damping wings in galaxies
• How robust are the parameter constraints extending the $\Lambda$CDM model?
• New Interpretations of the Cosmological Preference for a Negative Neutrino Mass
• Impact of Low ell's on Large Scale Structure Anomalies
• Dark energy, spatial curvature, and star formation efficiency from JWST photometric and spectroscopic high-redshift galaxies
• Do JWST reionization (optical depth) puzzle, cosmological tensions, and CMB anomalies imply Harrison-Zel'dovich spectrum?
• Impact of reionization history on constraining primordial gravitational waves in future all-sky cosmic microwave background experiments
• Dipole-independent measurements of nearly-zero CMB correlation: a possible symmetry of primordial causal quantum coherence
• Refitting cosmological data with neutrino mass and degeneracy
• A New Boundary Condition on Reionization