Scale Dependence of Halo Bispectrum from Non-Gaussian Initial Conditions in Cosmological N-body Simulations

Abstract

We study the halo bispectrum from non-Gaussian initial conditions. Based on a set of large $N$-body simulations starting from initial density fields with local type non-Gaussianity, we find that the halo bispectrum exhibits a strong dependence on the shape and scale of Fourier space triangles near squeezed configurations at large scales. The amplitude of the halo bispectrum roughly scales as $f_n{l}^2$. The resultant scaling on the triangular shape is consistent with that predicted by Jeong & Komatsu based on perturbation theory. We systematically investigate this dependence with varying redshifts and halo mass thresholds. It is shown that the $f_{n}l$ dependence of the halo bispectrum is stronger for more massive haloes at higher redshifts. This feature can be a useful discriminator of inflation scenarios in future deep and wide galaxy redshift surveys.

27 pages, 10 figures; revised argument in section 6, added appendix C, JCAP accepted version

References in corpus (15)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• The imprints of primordial non-gaussianities on large-scale structure: scale dependent bias and abundance of virialized objects
• Transients from Initial Conditions in Cosmological Simulations
• Effects of Scale-Dependent Non-Gaussianity on Cosmological Structures
• The bispectrum of galaxies from high-redshift galaxy surveys: primordial non-Gaussianity and non-linear galaxy bias
• Primordial non-gaussianity, statistics of collapsed objects, and the Integrated Sachs-Wolfe effect
• 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
• Primordial non-Gaussianity, scale-dependent bias, and the bispectrum of galaxies
• Simulations of Baryon Acoustic Oscillations II: Covariance matrix of the matter power spectrum
• Signature of Primordial Non-Gaussianity on Matter Power Spectrum
• How Very Massive Metal Free Stars Start Cosmological Reionization
• Signatures of Primordial non-Gaussianities in the Matter Power-Spectrum and Bispectrum: the Time-RG Approach

Cited by in corpus (40)

• Large-Scale Galaxy Bias
• DESI and other dark energy experiments in the era of neutrino mass measurements
• Primordial non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure
• Large-scale Bias and Efficient Generation of Initial Conditions for Non-Local Primordial Non-Gaussianity
• Primordial non-Gaussianity in the Bispectrum of the Halo Density Field
• Non-Gaussian statistics of critical sets in 2 and 3D: Peaks, voids, saddles, genus and skeleton
• Effects and Detectability of Quasi-Single Field Inflation in the Large-Scale Structure and Cosmic Microwave Background
• Non-Gaussian Halo Bias Re-examined: Mass-dependent Amplitude from the Peak-Background Split and Thresholding
• Primordial Non-Gaussianity from Biased Tracers: Likelihood Analysis of Real-Space Power Spectrum and Bispectrum
• Non-Gaussian Minkowski functionals & extrema counts in redshift space
• N-body simulations with generic non-Gaussian initial conditions II: Halo bias
• On the impact of galaxy bias uncertainties on primordial non-Gaussianity constraints
• Primordial non-Gaussianity in the large scale structure of the Universe
• The Halo Bispectrum in N-body Simulations with non-Gaussian Initial Conditions
• Nonlinear clustering in models with primordial non-Gaussianity: the halo model approach
• Matter bispectrum of large-scale structure: Three-dimensional comparison between theoretical models and numerical simulations
• Modelling large-scale halo bias using the bispectrum
• Signatures of Primordial non-Gaussianities in the Matter Power-Spectrum and Bispectrum: the Time-RG Approach
• Limits on Second-Order Non-Gaussianity from Minkowski Functionals of WMAP Data
• Measuring primordial non-Gaussianity with weak-lensing surveys
• Strong orientation dependence of surface mass density profiles of dark haloes at large scales
• Combining perturbation theories with halo models for the matter bispectrum
• Magnification effect on the detection of primordial non-Gaussianity from photometric surveys
• The squeezed matter bispectrum covariance with responses
• Investigating Cluster Astrophysics and Cosmology with Cross-Correlation of the Thermal Sunyaev-Zel'dovich Effect and Weak Lensing
• Graph Database Solution for Higher Order Spatial Statistics in the Era of Big Data
• Large Scale Anisotropic Bias from Primordial non-Gaussianity
• Primordial non-Gaussianity in the bispectra of large-scale structure
• PNG-UNITsims: Halo clustering response to primordial non-Gaussianities as a function of mass
• Probing Primordial Non-Gaussianity with Weak Lensing Minkowski Functionals
• Halo statistics in non-Gaussian cosmologies: the collapsed fraction, conditional mass function, and halo bias from the path-integral excursion set method
• Halo/Galaxy Bispectrum with Primordial non-Gaussianity from integrated Perturbation Theory (iPT)
• Effect of primordial non-Gaussianities on the far-UV luminosity function of high-redshift galaxies: implications for cosmic reionization
• Measuring the Energy Scale of Inflation with Large Scale Structures
• Scale Dependence of the Halo Bias in General Local-Type Non-Gaussian Models I: Analytical Predictions and Consistency Relations
• $\text{PineTree}$: A generative, fast, and differentiable halo model for wide-field galaxy surveys
• Constraining higher-order parameters for primordial non-Gaussianities from power spectra and bispectra of imaging survey
• The pairwise velocity probability density function in models with local primordial non-Gaussianity
• Testing primordial non-Gaussianities on galactic scales at high redshift
• Halo/Galaxy Bispectrum with Equilateral-type Primordial Trispectrum