Investigating the Origin of CMB Large-Scale Features Using LiteBIRD and CMB-S4
arXiv:2411.03459 · doi:10.1088/1475-7516/2025/06/035
Abstract
Several missions following Planck are currently under development, which will provide high-precision measurements of the Cosmic Microwave Background (CMB) anisotropies. Specifically, measurements of the E modes will become nearly limited by cosmic variance, which, especially when considering the sharpness of the E-mode transfer functions, may allow for the ability to detect deviations from the concordance model in the CMB data. We investigate the capability of upcoming missions to scrutinize models that have been proposed to address large-scale anomalies observed in the temperature spectra from WMAP and Planck. To this purpose, we consider four benchmarks that modify the CMB angular power spectra at large scales: models producing suppression, a dip, and amplification in the primordial scalar power spectrum, as well as a beyond-Lambda CDM prescription of dark energy. Our analysis shows that large-scale measurements from LiteBIRD will be able to distinguish between various types of primordial and late-time models that predict modifications to the angular spectra at these scales. Moreover, if these deviations from the standard cosmological model are determined to be systematic and do not reflect the true universe model, future experiments could potentially dismiss these features as statistical fluctuations. We also show that additional measurements from CMB-S4 can impose more stringent constraints by probing correlated signals that these models predict at smaller scales (l>100). A byproduct of our analysis is that a recently proposed "Dark Dimension" scenario, featuring power amplification at large scales, is strongly bound by current data, pushing the deviation from the standard model to unobservable scales. Overall, our results demonstrate that future CMB measurements can provide valuable insights into large-scale anomalies that are present in the current CMB data.
34 pages, 12 figures; v2 matches version published in JCAP
References in corpus (96)
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- Planck 2018 results. X. Constraints on inflation
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- Planck 2018 results. I. Overview and the cosmological legacy of Planck
- The Simons Observatory: Science goals and forecasts
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
- Can the dark energy equation-of-state parameter w be less than -1?
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
- Signature of Gravity Waves in Polarization of the Microwave Background
- BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
- A Probe of Primordial Gravity Waves and Vorticity
- What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
- The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
- Primordial Non-Gaussianities from Inflation Models
- Quasi-Single Field Inflation and Non-Gaussianities
- PolyChord: nested sampling for cosmology
- PolyChord: next-generation nested sampling
- The String Landscape and the Swampland
- Anisotropies in the Cosmic Microwave Background: An Analytic Approach
- Oscillations in the CMB from Axion Monodromy Inflation
- Suppressing the lower Multipoles in the CMB Anisotropies
- Inflationary perturbations from a potential with a step
- Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
- Improved limits on the tensor-to-scalar ratio using BICEP and Planck
- Large Scale Cosmic Microwave Background Anisotropies and Dark Energy
- Likelihood Analysis of CMB Temperature and Polarization Power Spectra
- Measuring Polarization In Cosmic Microwave Background
- Cosmological Collider Physics
- Features and New Physical Scales in Primordial Observables: Theory and Observation
- Multiple inflation
- Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure
- Punctuated inflation and the low CMB multipoles
- The Dark Dimension and the Swampland
- Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation
- CMB polarization features from inflation versus reionization
- A Detailed Description of the CamSpec Likelihood Pipeline and a Reanalysis of the Planck High Frequency Maps
- Primordial features due to a step in the inflaton potential
- Anisotropies of Gravitational Wave Backgrounds: A Line Of Sight Approach
- Duality Cascade in Brane Inflation
- Particle Production During Inflation: Observational Constraints and Signatures
- Cosmological Fluctuations from Infra-Red Cascading During Inflation
- BINGO: A code for the efficient computation of the scalar bi-spectrum
- Generalized Slow Roll for Large Power Spectrum Features
- Probing Primordial Features with the Stochastic Gravitational Wave Background
- The tensor-to-scalar ratio in punctuated inflation
- Updated constraints on amplitude and tilt of the tensor primordial spectrum
- Probing primordial features with future galaxy surveys
- Inflation: Theory and Observations
- Wiggly Whipped Inflation
- Whipped inflation
- Cosmology From CMB Lensing and Delensed EE Power Spectra Using 2019-2020 SPT-3G Polarization Data
- Just enough inflation: power spectrum modifications at large scales
- The Future of Primordial Features with Large-Scale Structure Surveys
- The Future of Primordial Features with 21 cm Tomography
- The Imprint of Relativistic Particles on the Anisotropies of the Stochastic Gravitational-Wave Background
- Combining power spectrum and bispectrum measurements to detect oscillatory features
- Primordial Features from Linear to Nonlinear Scales
- Scratches from the Past: Inflationary Archaeology through Features in the Power Spectrum of Primordial Fluctuations
- Precise measurements of inflationary features with 21 cm observations
- Polyspectra searches for sharp oscillatory features in cosmic microwave sky data
- Probing pre-Recombination Physics by the Cross-Correlation of Stochastic Gravitational Waves and CMB Anisotropies
- New constraint on the tensor-to-scalar ratio from the and BICEP/Keck Array data using the profile likelihood
- Constraining inflation with future galaxy redshift surveys
- Classical Cosmological Collider Physics and Primordial Features
- Cross-correlating Astrophysical and Cosmological Gravitational Wave Backgrounds with the Cosmic Microwave Background
- Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum
- Generating primordial features at large scales in two field models of inflation
- Planck and BICEP/Keck Array 2018 constraints on primordial gravitational waves and perspectives for future B-mode polarization measurements
- Quantum Primordial Standard Clocks
- Uncovering the History of Cosmic Inflation from Anomalies in Cosmic Microwave Background Spectra
- Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
- Probing primordial features with next-generation photometric and radio surveys
- Constraints on inflation with LSS surveys: features in the primordial power spectrum
- Constraining the kinetically dominated Universe
- Lectures on the string landscape and the Swampland
- Primordial Standard Clock Models and CMB Residual Anomalies
- Complete WMAP Constraints on Bandlimited Inflationary Features
- Comparing multi-field primordial feature models with the Planck data
- Detecting primordial features with LISA
- Probing features in inflaton potential and reionization history with future CMB space observations
- Euclid: The search for primordial features
- Probing features in the primordial perturbation spectrum with large-scale structure data
- Polarization Predictions for Inflationary CMB Power Spectrum Features
- Observational Hints of a Pre--Inflationary Scale?
- Changes in the halo formation rates due to features in the primordial spectrum
- New constraints on primordial features from the galaxy two-point correlation function
- Large extra dimensions from higher-dimensional inflation
- Back to the features: assessing the discriminating power of future CMB missions on inflationary models
- Constraints on features in the inflationary potential from future Euclid data
- Primordial feature constraints from BOSS+eBOSS
- Nonlinear reconstruction of features in the primordial power spectrum from large-scale structure
- Fingerprints of a Non-Inflationary Universe from Massive Fields
- The MESS of the CMB
- Quantum initial conditions for curved inflating universes
- Swamplandish Unification of the Dark Sector
- Unraveling the CMB lack-of-correlation anomaly with the cosmological gravitational wave background