Testing the Running of non-Gaussianity through the CMB mu-distortion and the Halo Bias

Abstract

The primordial non-Gaussianity parameters fNL and tauNL may be scale-dependent. We investigate the capability of future measurements of the CMB mu-distortion, which is very sensitive to small scales, and of the large-scale halo bias to test the running of local non-Gaussianity. We show that, for an experiment such as PIXIE, a measurement of the mu-temperature correlation can pin down the spectral indices n_fNL and n_tauNL to values of the order of 0.3 if fNL = 20 and tauNL = 5000. A similar value can be achieved with an all-sky survey extending to redshift z ~ 1. In the particular case in which the two spectral indices are equal, as predicted in models where the cosmological perturbations are generated by a single-field other than the inflaton, then the 1-sigma error on the scale-dependence of the non-linearity parameters goes down to 0.2.

arXiv comment11 pages, 7 figures

References in corpus (46)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• Non-Gaussianity from Inflation: Theory and Observations
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
• Constraints on local primordial non-Gaussianity from large scale structure
• The evolution of CMB spectral distortions in the early Universe
• Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures
• Non-Gaussianity in the modulated reheating scenario
• Running Non-Gaussianities in DBI Inflation
• Primordial non-gaussianity, statistics of collapsed objects, and the Integrated Sachs-Wolfe effect
• Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
• Constraining primordial non-Gaussianity with future galaxy surveys
• Primordial non-Gaussianity: large-scale structure signature in the perturbative bias model
• Structure formation from non-Gaussian initial conditions: multivariate biasing, statistics, and comparison with N-body simulations
• Operator Product Expansion of Inflationary Correlators and Conformal Symmetry of de Sitter
• Constraining Running Non-Gaussianity
• Scale-dependent non-Gaussianity probes inflationary physics
• Rapidly-Varying Speed of Sound, Scale Invariance and Non-Gaussian Signatures
• CMB Constraints on Primordial non-Gaussianity from the Bispectrum (f_{NL}) and Trispectrum (g_{NL} and τ_{NL}) and a New Consistency Test of Single-Field Inflation
• Halo Clustering with Non-Local Non-Gaussianity
• A New Window on Primordial non-Gaussianity
• Scale-dependent bias of galaxies and mu-type distortion of the cosmic microwave background spectrum from single-field inflation with a modified initial state
• Optimal Constraints on Local Primordial Non-Gaussianity from the Two-Point Statistics of Large-Scale Structure
• Conformal invariance of scalar perturbations in inflation
• A generalized local ansatz and its effect on halo bias
• Non-Gaussian Halo Bias Re-examined: Mass-dependent Amplitude from the Peak-Background Split and Thresholding
• Stochastic Bias from Non-Gaussian Initial Conditions
• Primordial non-Gaussianity in the large scale structure of the Universe
• The Four-point Correlator in Multifield Inflation, the Operator Product Expansion and the Symmetries of de Sitter
• Non-Gaussianity and large-scale structure in a two-field inflationary model
• Halo clustering and g_{NL}-type primordial non-Gaussianity
• Strongly Scale-dependent Non-Gaussianity
• Large non-Gaussian Halo Bias from Single Field Inflation
• Scale-Dependent Non-Gaussianity as a Generalization of the Local Model
• Optimal dataset combining in f_nl constraints from large scale structure in an idealised case
• Strongly scale-dependent polyspectra from curvaton self-interactions
• First constraints on the running of non-Gaussianity
• Negative spectral index of $f_{NL}$ in the axion-type curvaton model
• Constraining Scale-Dependent Non-Gaussianity with Future Large-Scale Structure and the CMB
• Scale dependent bias from primordial non-Gaussianity with trispectrum
• Loop corrections and a new test of inflation
• Scale-dependent bias with higher order primordial non-Gaussianity: Use of the Integrated Perturbation Theory
• Testing Multi-Field Inflation with Galaxy Bias
• Scale dependence of $f_{NL}$ in N-flation

Cited by in corpus (32)

• Features and New Physical Scales in Primordial Observables: Theory and Observation
• PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An Extended White Paper
• Exploring Cosmic Origins with CORE: Inflation
• Teasing bits of information out of the CMB energy spectrum
• Which spectral distortions does $\Lambda$CDM actually predict?
• Distinguishing different scenarios of early energy release with spectral distortions of the cosmic microwave background
• CMB spectral distortions revisited: a new take on $\mu$ distortions and primordial non-Gaussianities from FIRAS data
• Probing the scale dependence of non-Gaussianity with spectral distortions of the cosmic microwave background
• High-redshift JWST Observations and Primordial Non-Gaussianity
• The Hunt for Primordial Interactions in the Large Scale Structures of the Universe
• Shot noise and biased tracers: a new look at the halo model
• Spectral distortions from the dissipation of tensor perturbations
• Evolution of CMB spectral distortion anisotropies and tests of primordial non-Gaussianity
• Extracting foreground-obscured $\mu$-distortion anisotropies to constrain primordial non-Gaussianity
• Primordial trispectra and CMB spectral distortions
• Induced superhorizon tensor perturbations from anisotropic non-Gaussianity
• Primordial non-Gaussianity with $\mu$-type and $y$-type spectral distortions: exploiting Cosmic Microwave Background polarization and dealing with secondary sources
• Correlating CMB Spectral Distortions with Temperature: what do we learn on Inflation?
• Constraints on Gravitino Decay and the Scale of Inflation using CMB spectral distortions
• CMB constraints on running non-Gaussianity
• Angular dependence of primordial trispectra and CMB spectral distortions
• CMB $\mu T$ cross-correlations as a probe of PBH scenarios
• Measuring primordial anisotropic correlators with CMB spectral distortions
• Primordial Power Spectrum features and $f_{NL}$ constraints
• Scale-dependent bias from multiple-field inflation
• Influence of Reheating on the Trispectrum and its Scale Dependence
• New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
• Constraints on Running of Non-Gaussianity from Large Scale Structure Probes
• Test of the Einstein equivalence principle with spectral distortions in the cosmic microwave background
• CMB spectroscopy at third-order in cosmological perturbations
• Generalized local ansatz for scale-dependent primordial non-Gaussianities and future galaxy surveys
• Probing the Running of Primordial Bispectrum and Trispectrum using CMB Spectral Distortions