Anisotropic Halo Model

Abstract

In the present work, we extend the classic halo model for the large-scale matter distribution including a triaxial model for the halo profiles and their alignments. In particular, we derive general expressions for the halo-matter cross correlation function. In addition, by numerical integration, we obtain instances of the cross-correlation function depending on the directions given by halo shape axes. These functions are called anisotropic cross-correlations. With the aim of comparing our theoretical results with the simulations, we compute averaged anisotropic correlations in cones with their symmetry axis along each shape direction of the centre halo. From these comparisons we characterise and quantify the alignment of dark matter haloes on the $\Lambda$CDM context by means of the presented anisotropic halo model. As our model requires multidimensional integral computation we implement a Monte Carlo method on GPU hardware which allows us to increase the precision of the results whereas it improves the performance of the computation.

arXiv comment10 pages, 5 figures. Accepted for publication in MNRAS

References in corpus (48)

• A Universal Density Profile from Hierarchical Clustering
• The cosmological simulation code GADGET-2
• Halo Models of Large Scale Structure
• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
• How Filaments are Woven into the Cosmic Web
• Analytic model for galaxy and dark matter clustering
• Halo occupation numbers and galaxy bias
• Power Spectra for Cold Dark Matter and its Variants
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• The Shape of Dark Matter Halos: Dependence on Mass, Redshift, Radius, and Formation
• Properties of Dark Matter Haloes in Clusters, Filaments, Sheets and Voids
• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys
• Spin alignment of dark matter haloes in filaments and walls
• NEXUS: Tracing the Cosmic Web Connection
• Measurement of intrinsic alignments in galaxy ellipticities
• Inter-cluster filaments in a $\Lambda$CDM Universe
• Shapes and Alignments of Galaxy Cluster Halos
• Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations
• A halo model for intrinsic alignments of galaxy ellipticities
• Intrinsic correlation of halo ellipticity and its implications for large-scale weak lensing surveys
• Weak lensing with COMBO-17: estimation and removal of intrinsic alignments
• Weak gravitational lensing: reducing the contamination by intrinsic alignments
• The Shapes and Alignments of Dark Matter Halos
• Separating cosmic shear from intrinsic galaxy alignments: correlation function tomography
• Angular momentum-Large-scale structure alignments in LCDM models and the SDSS
• Tomography of lensing cross power spectra
• The Influence of Large-Scale Structure on Halo Shapes and Alignments
• Alignment between galaxies and large-scale structure
• The orientation of galaxy dark matter haloes around cosmic voids
• Cosmic shear as a tool for precision cosmology: minimising intrinsic galaxy alignment-lensing interference
• Alignments of Galaxy Group Shapes with Large Scale Structure
• Shapes of Gas, Gravitational Potential and Dark Matter in Lambda-CDM Clusters
• Shapes of clusters and groups of galaxies: Comparison of model predictions with observations
• The Shape-Alignment relation in $\Lambda$CDM Cosmic Structures
• Triaxial haloes, intrinsic alignments and the dark matter power spectrum
• Detection of intrinsic cluster alignments to 100 Mpc/h in the SDSS
• The impact of halo shapes on the bispectrum in cosmology
• Spin alignment of dark matter haloes in the shells of the largest voids
• The effects of halo alignment and shape on the clustering of galaxies
• An Analytic Model for the Axis-Ratio Distribution of Dark Matter Halos from the Primordial Gaussian Density Field
• The galaxy-galaxy lensing contribution to the cosmic shear two point function
• The geometry of the filamentary environment of galaxy clusters
• Controlling intrinsic-shear alignment in three-point weak lensing statistics
• Cosmic magnification: nulling the intrinsic clustering signal
• Anisotropy in the matter distribution beyond the baryonic acoustic oscillation scale
• Intrinsic alignment boosting: Direct measurement of intrinsic alignments in cosmic shear data

Cited by in corpus (7)

• Anisotropic Models for Globular Clusters, Galactic Bulges and Dark Halos
• Correlations between Triaxial Shapes and Formation History of Dark Matter Haloes
• Taking advantage of photometric galaxy catalogues to determine the halo occupation distribution
• Possible features of galactic halo with electric field and observational constraints
• Differentiable Predictions for Large Scale Structure with SHAMNet
• The Global Environment of Small Galaxy Systems
• Distribution functions for a family of general-relativistic Hypervirial models in collisionless regime