Effects of halo substructure on the power spectrum and bispectrum

Abstract

We study the effects of halo substructure and a distribution in the concentration parameter of haloes on large-scale structure statistics. The effects on the power spectrum and bispectrum are studied on the smallest scales accessible from future surveys. We compare halo-model predictions with results based on N-body simulations, but also extend our predictions to 10-kpc scales which will be probed by future simulations. We find that weak-lensing surveys proposed for the coming decade can probe the power spectrum on small enough scales to detect substructure in massive haloes. We discuss the prospects of constraining the mass fraction in substructure in view of partial degeneracies with parameters such as the tilt and running of the primordial power spectrum.

arXiv comment9 pages, 10 figures; replaced with version published in MNRAS; removed grey-scale versions of figures which were being included at the end by the server

References in corpus (30)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• A Universal Density Profile from Hierarchical Clustering
• Dark Matter Substructure in Galactic Halos
• Large scale bias and the peak background split
• Where are the missing galactic satellites?
• Weak Gravitational Lensing
• Profiles of dark haloes: evolution, scatter, and environment
• Stable clustering, the halo model and nonlinear cosmological power spectra
• Halo Models of Large Scale Structure
• Cold collapse and the core catastrophe
• Analytic model for galaxy and dark matter clustering
• Halo occupation numbers and galaxy bias
• How Many Galaxies Fit in a Halo? Constraints on Galaxy Formation Efficiency from Spatial Clustering
• Density profiles and substructure of dark matter halos: converging results at ultra-high numerical resolution
• Evidence for substructure in lens galaxies?
• Cosmic Background Anisotropies in CDM Cosmology
• Sample Variance Considerations for Cluster Surveys
• Deriving the Nonlinear Cosmological Power Spectrum and Bispectrum from Analytic Dark Matter Halo Profiles and Mass Functions
• Cosmic Complementarity: Joint Parameter Estimation from CMB Experiments and Redshift Surveys
• On Departures From a Power Law in the Galaxy Correlation Function
• The density profile of equilibrium and non-equilibrium dark matter halos
• Measuring Cosmological Parameters from the Evolution of Cluster X-ray Temperatures
• The mass function
• Survival of Substructure within Dark Matter Haloes
• The Three-Point Correlation Function in Cosmology
• Power Spectrum Covariance of Weak Gravitational Lensing
• The Growth of Correlations in the Matter Power Spectrum
• Lensing Optical Depth for Substructure and Isolated Dark Matter Halos
• Substructure and the halo model of large-scale structure
• Halo Concentration and the Dark Matter Power Spectrum

Cited by in corpus (20)

• Gravitational Lensing
• Cosmology with Weak Lensing Surveys
• Dark Matter from Early Decays
• Cosmological baryonic and matter densities from 600,000 SDSS Luminous Red Galaxies with photometric redshifts
• Cosmology with photometric redshift surveys
• Halo-model signatures from 380,000 SDSS Luminous Red Galaxies with photometric redshifts
• Self Calibration of Tomographic Weak Lensing for the Physics of Baryons to Constrain Dark Energy
• The halo model for cosmology: a pedagogical review
• A Realistic Model for Spatial and Mass Distributions of Dark Halo Substructures: An Analytic Approach
• Triaxial haloes, intrinsic alignments and the dark matter power spectrum
• Reducing the shear
• The impact of halo shapes on the bispectrum in cosmology
• Cosmological Three-Point Function: Testing The Halo Model Against Simulations
• A fitting formula for the non-Gaussian contribution to the lensing power spectrum covariance
• The Influence of Galaxy Formation Physics on Weak Lensing Tests of General Relativity
• Impact of Dark Matter Substructure on the Matter and Weak Lensing Power Spectra
• Forecasting neutrino masses from galaxy clustering in the Dark Energy Survey combined with the Planck Measurements
• Weak lensing of gravitational waves in wave optics: Beyond the Born approximation
• Cosmology with Weak Lensing Surveys
• Explicit computation of shear three-point correlation functions: the one-halo model case