Fingerprints of Anomalous Primordial Universe on the Abundance of Large Scale Structures

Abstract

We study the predictions of anomalous inflationary models on the abundance of structures in large scale structure observations. The anomalous features encoded in primordial curvature perturbation power spectrum are (a): localized feature in momentum space, (b): hemispherical asymmetry and (c): statistical anisotropies. We present a model-independent expression relating the number density of structures to the changes in the matter density variance. Models with localized feature can alleviate the tension between observations and numerical simulations of cold dark matter structures on galactic scales as a possible solution to the missing satellite problem. In models with hemispherical asymmetry we show that the abundance of structures becomes asymmetric depending on the direction of observation to sky. In addition, we study the effects of scale-dependent dipole amplitude on the abundance of structures and, using the quasars data, we find the upper bound $n_A<0.6$ for the spectral index of the dipole asymmetry. In all cases there is a critical mass scale $M_c$ in which for $M<M_c(M>M_c)$ the enhancement in variance induced from anomalous feature decreases (increases) the abundance of dark matter structures in Universe.

arXiv comment15 pages, 6 figures, published in JCAP, Final Version

References in corpus (76)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Cosmological parameters from SDSS and WMAP
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Large scale bias and the peak background split
• Where are the missing galactic satellites?
• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• The 3D power spectrum of galaxies from the SDSS
• An analytic model for the spatial clustering of dark matter haloes
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Hybrid Inflation
• Planck 2013 results. XXII. Constraints on inflation
• False Vacuum Inflation with Einstein Gravity
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• The Dark Side of the Halo Occupation Distribution
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• Primordial Non-Gaussianities from Inflation Models
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Are There Cosmic Microwave Background Anomalies?
• Towards a Precise Measurement of Matter Clustering: Lyman-alpha Forest Data at Redshifts 2-4
• Dark matter and cosmic structure
• Inflationary Universe with Anisotropic Hair
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• The Cluster Abundance in Flat and Open Cosmologies
• Imprints of a Primordial Preferred Direction on the Microwave Background
• Hemispherical power asymmetry in the three-year Wilkinson Microwave Anisotropy Probe sky maps
• Increasing evidence for hemispherical power asymmetry in the five-year WMAP data
• The Excursion Set Theory of Halo Mass Functions, Halo Clustering, and Halo Growth
• Hunting for Primordial Non-Gaussianity in the Cosmic Microwave Background
• The bispectrum of galaxies from high-redshift galaxy surveys: primordial non-Gaussianity and non-linear galaxy bias
• A Baryonic Solution to the Missing Satellites Problem
• Estimators for CMB Statistical Anisotropy
• The anisotropic power spectrum and bispectrum in the f(phi) F^2 mechanism
• The Nature of Primordial Fluctuations from Anisotropic Inflation
• A Hemispherical Power Asymmetry from Inflation
• Cosmic Microwave Background Statistics for a Direction-Dependent Primordial Power Spectrum
• Scalar-Scalar, Scalar-Tensor, and Tensor-Tensor Correlators from Anisotropic Inflation
• Power Asymmetry in Cosmic Microwave Background Fluctuations from Full Sky to Sub-degree Scales: Is the Universe Isotropic?
• Power asymmetry in WMAP and Planck temperature sky maps as measured by a local variance estimator
• Separating the Early Universe from the Late Universe: cosmological parameter estimation beyond the black box
• Matter Power Spectrum from the Lyman-Alpha Forest: Myth or Reality?
• Inflation, Cosmic Perturbations and Non-Gaussianities
• Bayesian analysis of sparse anisotropic universe models and application to the 5-yr WMAP data
• Primordial Power Spectra from Anisotropic Inflation
• Limits on anisotropic inflation from the Planck data
• The Halo Mass Function from Excursion Set Theory. II. The Diffusing Barrier
• Signatures of anisotropic sources in the squeezed-limit bispectrum of the cosmic microwave background
• Asymmetric Beams and CMB Statistical Anisotropy
• Constraints on cosmic hemispherical power anomalies from quasars
• Bayesian analysis of an anisotropic universe model: systematics and polarization
• The Pesky Power Asymmetry
• The Halo Mass Function from Excursion Set Theory. III. Non-Gaussian Fluctuations
• Broken Isotropy from a Linear Modulation of the Primordial Perturbations
• The CMB asymmetry from inflation
• δN Formalism in Anisotropic Inflation and Large Anisotropic Bispectrum and Trispectrum
• Combining clustering and abundances of galaxy clusters to test cosmology and primordial non-Gaussianity
• Prospects for Detecting Dark Matter Halo Substructure with Pulsar Timing
• Constraining anisotropic models of the early Universe with WMAP9 data
• Hemispherical Asymmetry and Local non-Gaussianity: a Consistency Condition
• Asymmetric Sky from the Long Mode Modulations
• Curvature Perturbations in Anisotropic Inflation with Symmetry Breaking
• The Knotted Sky I: Planck constraints on the primordial power spectrum
• The small scale power asymmetry in the cosmic microwave background
• Cold dark matter models with high baryon content
• Excursion Set Theory for generic moving barriers and non-Gaussian initial conditions
• An Improved Calculation of the Non-Gaussian Halo Mass Function
• The statistically anisotropic curvature perturbation generated by f(ϕ)^2 F^2
• Galaxy Formation: Warm Dark Matter, Missing Satellites, and the Angular Momentum Problem
• CMB Hemispherical Asymmetry: Long Mode Modulation and non-Gaussianity
• Large Scale Anisotropic Bias from Primordial non-Gaussianity
• Changes in the halo formation rates due to features in the primordial spectrum
• Running with BICEP2: Implications for Small-Scale Problems in CDM
• CMB Aberration and Doppler Effects as a Source of Hemispherical Asymmetries
• Local Features with Large Spiky non-Gaussianities during Inflation
• Transient Weak-Lensing by Cosmological Dark Matter Microhaloes
• Constraints on small-scale cosmological perturbations from gamma-ray searches for dark matter

Cited by in corpus (10)

• Constraints on small-scale primordial power by annihilation signals from extragalactic dark matter minihalos
• Expected dipole asymmetry in CMB polarization
• Late time sky as a probe of steps and oscillations in primordial Universe
• Testing physical models for dipolar asymmetry with CMB polarization
• Lensing as a Probe of Early Universe: from CMB to Galaxies
• Primordial anisotropies from cosmic strings during inflation
• Modified initial power spectrum and too big to fail problem
• Closing in on the large-scale CMB power asymmetry
• 21-cm power spectrum and ionization bias as a probe of long-mode modulated non Gaussian sky
• Addressing the too-big-to-fail problem and the void phenomenon through a modified initial power spectrum