Probing features in inflaton potential and reionization history with future CMB space observations

Abstract

We consider the prospects of probing features in the primordial power spectrum with future Cosmic Microwave Background (CMB) polarization measurements. In the scope of the inflationary scenario, such features in the spectrum can be produced by local non-smooth pieces in an inflaton potential (smooth and quasi-flat in general) which in turn may originate from fast phase transitions during inflation in other quantum fields interacting with the inflaton. They can fit some outliers in the CMB temperature power spectrum which are unaddressed within the standard inflationary $\mathrm{\Lambda }$CDM model. We consider Wiggly Whipped Inflation (WWI) as a theoretical framework leading to improvements in the fit to the Planck 2015 temperature and polarization data in comparison with the standard inflationary models, although not at a statistically significant level. We show that some type of features in the potential within the WWI models, leading to oscillations in the primordial power spectrum that extend to intermediate and small scales can be constrained with high confidence (at 3$\sigma$ or higher confidence level) by an instrument as the Cosmic ORigins Explorer (CORE). In order to investigate the possible confusion between inflationary features and footprints from the reionization era, we consider an extended reionization history with monotonic increase of free electrons with decrease in redshift. We discuss the present constraints on this model of extended reionization and future predictions with CORE. We also project, to what extent, this extended reionization can create confusion in identifying inflationary features in the data.

arXiv commentv1: 24 pages, 7 figures and 2 tables; v2: 25 pages, 7 figures and 2 tables

References in corpus (70)

• Planck 2015 results. XIII. Cosmological parameters
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• 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
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Planck 2013 results. XXII. Constraints on inflation
• Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Reionization after Planck: The Derived Growth of the Cosmic Ionizing Emissivity now matches the Growth of the Galaxy UV Luminosity Density
• Oscillations in the CMB from Axion Monodromy Inflation
• Suppressing the lower Multipoles in the CMB Anisotropies
• Inflationary perturbations from a potential with a step
• Gauge invariant MSSM inflaton
• Reconstructing the primordial power spectrum
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Multi-field Conformal Cosmological Attractors
• Inflation and WMAP three year data: Features have a Future!
• Primordial power spectrum from WMAP
• Separating the Early Universe from the Late Universe: cosmological parameter estimation beyond the black box
• Punctuated inflation and the low CMB multipoles
• Robust forecasts on fundamental physics from the foreground-obscured, gravitationally-lensed CMB polarization
• CMB polarization features from inflation versus reionization
• New Universal Local Feature in the Inflationary Perturbation Spectrum
• The Atacama Cosmology Telescope: a measurement of the primordial power spectrum
• Primordial features due to a step in the inflaton potential
• Model-Independent Reconstruction of the Primordial Power Spectrum from WMAP Data
• A Toy Model for Open Inflation
• Model-Independent Reionization Observables in the CMB
• BINGO: A code for the efficient computation of the scalar bi-spectrum
• Oscillations in the inflaton potential?
• Searching for Oscillations in the Primordial Power Spectrum: Constraints from Planck (Paper II)
• Primordial power spectrum from Planck
• Probing primordial features with future galaxy surveys
• Model selection applied to reconstruction of the Primordial Power Spectrum
• Wiggly Whipped Inflation
• Estimation of Primordial Spectrum with post-WMAP 3 year data
• Whipped inflation
• Reconstruction of the Primordial Power Spectrum using Temperature and Polarisation Data from Multiple Experiments
• Warp Features in DBI Inflation
• Is a step in the primordial spectral index favored by CMB data ?
• Inflation after False Vacuum Decay: Observational Prospects after Planck
• Oscillations in the inflaton potential: Complete numerical treatment and comparison with the recent and forthcoming CMB datasets
• Planck Constraints on Monodromy Inflation
• Reconstruction of the primordial power spectrum of curvature perturbations using multiple data sets
• Principal Power of the CMB
• Constraining Monodromy Inflation
• Non-parametric reconstruction of the primordial power spectrum at horizon scales from WMAP data
• Measuring the primordial power spectrum: Principal component analysis of the cosmic microwave background
• Updating constraints on inflationary features in the primordial power spectrum with the Planck data
• Reconstructing the inflationary power spectrum from CMBR data
• Reconstructing the primordial power spectrum from the CMB
• Reconstruction of broad features in the primordial spectrum and inflaton potential from Planck
• Primordial power spectrum: a complete analysis with the WMAP nine-year data
• Ruling out the power-law form of the scalar primordial spectrum
• Primordial features and Planck polarization
• The Search For Primordial Tensor Modes
• Wiggles in the cosmic microwave background radiation: echoes from non-singular cyclic-inflation
• Constraining Cosmological Parameters by the Cosmic Inversion Method
• Effects of discontinuities of the derivatives of the inflaton potential
• Inflation After False Vacuum Decay: New Evidence from BICEP2
• Optimal Binning of the Primordial Power Spectrum
• Witnessing the reionization history using Cosmic Microwave Background observation from Planck
• Changes in the halo formation rates due to features in the primordial spectrum
• Running from Features: Optimized Evaluation of Inflationary Power Spectra
• Nonlinear Excitations in Inflationary Power Spectra
• Generic inference of inflation models by non-Gaussianity and primordial power spectrum reconstruction

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• Reionization in the dark and the light from Cosmic Microwave Background
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