Primordial Features from Linear to Nonlinear Scales

Abstract

Sharp features in the primordial power spectrum are a powerful window into the inflationary epoch. To date, the cosmic microwave background (CMB) has offered the most sensitive avenue to search for these signatures. In this paper, we demonstrate the power of large-scale structure observations to surpass the CMB as a probe of primordial features. We show that the signatures in galaxy surveys can be separated from the broadband power spectrum and are as robust to the nonlinear evolution of matter as the standard baryon acoustic oscillations. As a result, analyses can exploit a significant range of scales beyond the linear regime available in the datasets. We develop a feature search for large-scale structure, apply it to the final data release of the Baryon Oscillation Spectroscopic Survey and find new bounds on oscillatory features that exceed the sensitivity of Planck for a significant range of frequencies. Moreover, we forecast that the next generation of galaxy surveys, such as DESI and Euclid, will be able to improve current constraints by up to an order of magnitude over an expanded frequency range.

60 pages, 20 figures, 2 tables; v2: minor changes

References in corpus (25)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Simons Observatory: Science goals and forecasts
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• Primordial Non-Gaussianities from Inflation Models
• Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
• Nonlinear Evolution of Baryon Acoustic Oscillations
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space
• Redshift-weighted constraints on primordial non-Gaussianity from the clustering of the eBOSS DR14 quasars in Fourier space
• Constraints on primordial non-Gaussianity from 800,000 photometric quasars
• Interpreting measurements of the anisotropic galaxy power spectrum
• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• Oscillations in the inflaton potential?
• Combining power spectrum and bispectrum measurements to detect oscillatory features
• Precise measurements of inflationary features with 21 cm observations
• Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features
• Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum
• Untangling features in the primordial spectra
• Disorder in the Early Universe
• Searching for Oscillations in the Primordial Power Spectrum with CMB and LSS Data
• Late time sky as a probe of steps and oscillations in primordial Universe
• CMB-S4 forecast on the primordial non-Gaussianity parameter of feature models

Cited by in corpus (50)

• A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO
• Consistent Modeling of Velocity Statistics and Redshift-Space Distortions in One-Loop Perturbation Theory
• Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation
• Unified galaxy power spectrum measurements from 6dFGS, BOSS, and eBOSS
• Accelerating astronomical and cosmological inference with Preconditioned Monte Carlo
• Robustness of baryon acoustic oscillation constraints for early-Universe modifications to $\Lambda$CDM
• Baryonic effects on the matter bispectrum
• The Hunt for Primordial Interactions in the Large Scale Structures of the Universe
• Baryon Acoustic Oscillation Theory and Modelling Systematics for the DESI 2024 results
• Constraining Single-Field Inflation with MegaMapper
• Uncovering the History of Cosmic Inflation from Anomalies in Cosmic Microwave Background Spectra
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
• Primordial Standard Clock Models and CMB Residual Anomalies
• Local primordial non-Gaussianity from the large-scale clustering of photometric DESI luminous red galaxies
• Planck residuals anomaly as a fingerprint of alternative scenarios to inflation
• Comparing multi-field primordial feature models with the Planck data
• Euclid: The search for primordial features
• The Effective Field Theory of Large-Scale Structure and Multi-tracer
• New constraints on primordial features from the galaxy two-point correlation function
• Light Fields during Inflation from BOSS and Future Galaxy Surveys
• Back to the features: assessing the discriminating power of future CMB missions on inflationary models
• Fisher Forecasts for Primordial non-Gaussianity from Persistent Homology
• Constraints on features in the inflationary potential from future Euclid data
• High-resolution CMB bispectrum estimator with flexible modal basis
• Cosmology before noon with multiple galaxy populations
• Primordial feature constraints from BOSS+eBOSS
• Curvature Perturbations From Stochastic Particle Production During Inflation
• Nonlinear reconstruction of features in the primordial power spectrum from large-scale structure
• The Phase of the BAO on Observable Scales
• Effect of damped oscillations in the inflationary potential
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Free-Streaming Neutrinos and Their Phase Shift in Current and Future CMB Power Spectra
• Searching for local features in primordial power spectrum using genetic algorithms
• On the primordial origin of the smoothing excess in the $Planck$ temperature power spectrum in light of LSS data
• Understanding large scale CMB anomalies with the generalized non-minimal derivative coupling during inflation
• Improving Constraints on Inflation with CMB Delensing
• Cosmology at high redshift -- a probe of fundamental physics
• Exploring Early and Late Cosmology with Next Generation Surveys
• Knot reconstruction of the scalar primordial power spectrum with Planck, ACT, and SPT CMB data
• Refining the nonlinear modelling of primordial oscillatory features
• Investigating the Origin of CMB Large-Scale Features Using LiteBIRD and CMB-S4
• A search for super-imposed oscillations to the primordial power spectrum in Planck and SPT-3G 2018 data
• Global 21 cm signal: a promising probe of primordial features
• Dark Acoustic Oscillations as an Early-Universe Explanation of the DESI Anomaly
• Inflation Story: slow-roll and beyond
• Investigating the Constraints on Primordial Features with Future Cosmic Microwave Background and Galaxy Surveys
• An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment
• Consistency of Planck Data With Power-Law Primordial Scalar Power Spectrum
• J-PAS: forecast on the primordial power spectrum reconstruction