Constraining primordial tensor features with the anisotropies of the Cosmic Microwave Background
arXiv:2209.00827 · doi:10.1088/1475-7516/2022/12/015
Abstract
It is commonly assumed that the stochastic background of gravitational waves on cosmological scales follows an almost scale-independent power spectrum, as generically predicted by the inflationary paradigm. However, it is not inconceivable that the spectrum could have strongly scale-dependent features, generated, e.g., via transient dynamics of spectator axion-gauge fields during inflation. Using the temperature and polarisation maps from the \textit{Planck} and BICEP/Keck datasets, we search for such features, taking the example of a log-normal bump in the primordial tensor spectrum at CMB scales. We do not find any evidence for the existence of bump-like tensor features at present, but demonstrate that future CMB experiments such as LiteBIRD and CMB-S4 will greatly improve our prospects of determining the amplitude, location and width of such a bump. We also highlight the role of delensing in constraining these features at angular scales .
arXiv comment16 pages, 7 figures. Version accepted at JCAP
References in corpus (51)
- Efficient Computation of CMB anisotropies in closed FRW models
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- Planck 2018 results. X. Constraints on inflation
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- The Simons Observatory: Science goals and forecasts
- Laser Interferometer Space Antenna
- Science Case for the Einstein Telescope
- An All-Sky Analysis of Polarization in the Microwave Background
- Planck 2018 results. V. CMB power spectra and likelihoods
- Statistics of Cosmic Microwave Background Polarization
- 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
- Planck 2018 results. VIII. Gravitational lensing
- Cobaya: Code for Bayesian Analysis of hierarchical physical models
- Cosmological Signature of New Parity-Violating Interactions
- Efficient sampling of fast and slow cosmological parameters
- Gravitational Lensing Effect on Cosmic Microwave Background Polarization
- Cosmology with the Laser Interferometer Space Antenna
- Reconstruction of lensing from the cosmic microwave background polarization
- Gauge Field Production in Axion Inflation: Consequences for Monodromy, non-Gaussianity in the CMB, and Gravitational Waves at Interferometers
- Particle production during inflation and gravitational waves detectable by ground-based interferometers
- Parity violation in the Cosmic Microwave Background from a pseudoscalar inflaton
- CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
- Improved limits on the tensor-to-scalar ratio using BICEP and Planck
- Separation of Gravitational-Wave and Cosmic-Shear Contributions to Cosmic Microwave Background Polarization
- Gravitational waves at interferometer scales and primordial black holes in axion inflation
- Polarization of the Microwave Background in Reionized Models
- Comments on the Starobinsky Model of Inflation and its Descendants
- Gravity waves and non-Gaussian features from particle production in a sector gravitationally coupled to the inflaton
- Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
- Planck 2013 results. XVIII. Gravitational lensing-infrared background correlation
- Finding the chiral gravitational wave background of an axion-SU(2) inflationary model using CMB observations and laser interferometers
- Gauge Field and Fermion Production during Axion Inflation
- Axion Inflation with an SU(2) Gauge Field: Detectable Chiral Gravity Waves
- Blue Tensor Spectrum from Particle Production during Inflation
- A Guide to Designing Future Ground-based CMB Experiments
- Observing the Inflaton Potential
- Measuring the spectrum of primordial gravitational waves with CMB, PTA and Laser Interferometers
- Recovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior: Methodology and Application to WMAP 3 Year Data
- Constraints on primordial gravitational waves from the Cosmic Microwave Background
- Updated constraints on amplitude and tilt of the tensor primordial spectrum
- Reconstructing the Inflaton Potential---Perturbative Reconstruction to Second Order
- Planck and BICEP/Keck Array 2018 constraints on primordial gravitational waves and perspectives for future B-mode polarization measurements
- Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey
- CMB Constraints on the Stochastic Gravitational-Wave Background at Mpc scales
- How to constrain inflationary parameter space with minimal priors
- New constraints on axion-gauge field dynamics during inflation from and BICEP/Keck data sets
- Redshift-space fluctuations in stochastic gravitational wave background
- Gravitational waves detectable in laser interferometers from axion-SU(2) inflation
- Reionization in the dark and the light from Cosmic Microwave Background