Measuring the surface mass density ellipticity of redMaPPer galaxy clusters using weak-lensing

Abstract

In this work we study the shape of the projected surface mass density distribution of galaxy clusters using weak-lensing stacking techniques. In particular, we constrain the average aligned component of the projected ellipticity, $\epsilon$, for a sample of redMaPPer clusters ($0.1\le z<0.4$). We consider six different proxies for the cluster orientation and measure $\epsilon$ for three ranges of projected distances from the cluster centres. The mass distribution in the inner region (up to $700$kpc) is better traced by the cluster galaxies with a higher membership probability, while the outer region (from $700$kpc up to $5$Mpc) is better traced by the inclusion of less probable galaxy cluster members. The fitted ellipticity in the inner region is $\epsilon =0.21\pm 0.04$, in agreement with previous estimates. We also study the relation between $\epsilon$ and the cluster mean redshift and richness. By splitting the sample in two redshift ranges according to the median redshift, we obtain larger $\epsilon$ values for clusters at higher redshifts, consistent with the expectation from simulations. In addition, we obtain higher ellipticity values in the outer region of clusters at low redshifts. We discuss several systematic effects that might affect the measured lensing ellipticities and their relation to the derived ellipticity of the mass distribution.

arXiv comment16 pages, 6 figures, submitted to MNRAS

References in corpus (83)

• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• A Universal Density Profile from Hierarchical Clustering
• Bayesian photometric redshift estimation
• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• Dark matter halo concentrations in the Wilkinson Microwave Anisotropy Probe year 5 cosmology
• Cosmology and fundamental physics with the Euclid satellite
• Dancing in the dark: galactic properties trace spin swings along the cosmic web
• Formation of Galaxy Clusters
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• redMaPPer I: Algorithm and SDSS DR8 Catalog
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey
• The Structure of Dark Matter Haloes in Hierarchical Clustering Models
• The Shape of Dark Matter Halos: Dependence on Mass, Redshift, Radius, and Formation
• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• Galaxies in the Hubble Ultra Deep Field: I. Detection, Multiband Photometry, Photometric Redshifts, and Morphology
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys - III. Application to the Canada-France-Hawaii Telescope Lensing Survey
• Gravitational Lensing Analysis of the Kilo Degree Survey
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey - Imaging Data and Catalogue Products
• Internal and External Alignment of the Shapes and Angular Momenta of LCDM Halos
• The redMaPPer Galaxy Cluster Catalog From DES Science Verification Data
• CFHTLenS: Improving the quality of photometric redshifts with precision photometry
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
• Dark Energy Survey Year 1 Results: Weak Lensing Mass Calibration of redMaPPer Galaxy Clusters
• Combined strong and weak lensing analysis of 28 clusters from the Sloan Giant Arcs Survey
• Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
• Shapes and Alignments of Galaxy Cluster Halos
• CFHTLenS: The relation between galaxy dark matter haloes and baryons from weak gravitational lensing
• The Redshift Evolution of LCDM Halo Parameters: Concentration, Spin, and Shape
• Weak Lensing Measurement of the Mass--Richness Relation of SDSS redMaPPer Clusters
• CFHTLenS: Co-evolution of galaxies and their dark matter haloes
• Anisotropic Distribution of SDSS Satellite Galaxies: Planar (not Polar) Alignment
• redMaPPer II: X-ray and SZ Performance Benchmarks for the SDSS Catalog
• Calibration of weak-lensing shear in the Kilo-Degree Survey
• Direct measurement of dark matter halo ellipticity from two-dimensional lensing shear maps of 25 massive clusters
• The Shapes and Alignments of Dark Matter Halos
• Cluster Alignments and Ellipticities in LCDM Cosmology
• The Red-sequence Cluster Survey-2 (RCS-2): survey details and photometric catalog construction
• The alignment and shape of dark matter, stellar, and hot gas distributions in the EAGLE and cosmo-OWLS simulations
• Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -II. Application to Simulations
• Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons
• Ellipticity of dark matter halos with galaxy-galaxy weak lensing
• Shape of Dark Matter Haloes in the Illustris Simulation: Effects of Baryons
• KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics-I: Inference from Analytical Prediction of High Signal-to-Noise Ratio Convergence Peaks
• The Masses and Shapes of Dark Matter Halos from Galaxy-Galaxy Lensing in the CFHTLS
• Cosmological Constraints From Weak Lensing Peak Statistics With CFHT Stripe 82 Survey
• Weak Lensing by Galaxies in Groups and Clusters: I.--Theoretical Expectations
• RCSLenS: The Red Cluster Sequence Lensing Survey
• Modeling projection effects in optically-selected cluster catalogues
• A Detection of Dark Matter Halo Ellipticity using Galaxy Cluster Lensing in SDSS
• First Measurement of the Cross-Correlation of CMB Lensing and Galaxy Lensing
• RCSLenS: Testing gravitational physics through the cross-correlation of weak lensing and large-scale structure
• The Anisotropic Distribution of Satellite Galaxies
• Universality of dark matter haloes shape over six decades in mass: Insights from the Millennium XXL and SBARBINE simulations
• Shapes of clusters and groups of galaxies: Comparison of model predictions with observations
• Constraints on the shapes of galaxy dark matter haloes from weak gravitational lensing
• The Projected Dark and Baryonic Ellipsoidal Structure of 20 CLASH Galaxy Clusters
• On the shape of dark matter halos from MultiDark Planck simulations
• Weak lensing mass map and peak statistics in Canada-France-Hawaii Telescope Stripe 82 survey
• Ellipsoidal halo finders and implications for models of triaxial halo formation
• CFHTLenS and RCSLenS: Testing Photometric Redshift Distributions Using Angular Cross-Correlations with Spectroscopic Galaxy Surveys
• Orientation Bias of Optically Selected Galaxy Clusters and Its Impact on Stacked Weak Lensing Analyses
• A look to the inside of haloes: a characterisation of the halo shape as a function of overdensity in the Planck cosmology
• The ellipticity of galaxy cluster halos from satellite galaxies and weak lensing
• Halo ellipticity of GAMA galaxy groups from KiDS weak lensing
• Lensing Measurements of the Ellipticity of LRG Dark Matter Halos
• Cluster Magnification & the Mass-Richness Relation in CFHTLenS
• Two-dimensional galaxy-galaxy lensing: a direct measure of the flattening and alignment of light and mass in galaxies
• Shapes and alignments of dark matter haloes and their brightest cluster galaxies in 39 strong lensing clusters
• Weak-Lensing Halo Numbers and Dark-Matter Profiles
• The Mass-Concentration Relation and the Stellar-to-Halo Mass Ratio in the CFHT Stripe 82 Survey
• Stellar-to-halo mass relation of cluster galaxies
• CLUMP-3D: Three-dimensional Shape and Structure of 20 CLASH Galaxy Clusters from Combined Weak and Strong Lensing
• SARCS strong-lensing galaxy groups: II - mass-concentration relation and strong-lensing bias
• CFHTLenS: Weak lensing constraints on the ellipticity of galaxy-scale matter haloes and the galaxy-halo misalignment
• Projected Axis Ratios of Galaxy Clusters in the Horizon-AGN Simulation: Impact of Baryon Physics and Comparison with Observations
• The Stripe 82 Massive Galaxy Project III: A Lack of Growth Among Massive Galaxies
• Weak-lensing calibration of a stellar mass-based mass proxy for redMaPPer and Voronoi Tessellation clusters in SDSS Stripe 82
• An analysis of galaxy cluster mis-centring using cosmological hydrodynamic simulations
• Compact Groups analysis using weak gravitational lensing II: CFHT Stripe 82 data
• Weak lensing analysis of galaxy pairs using CS82 data
• The shape of relaxed galaxy clusters and the public release of a HST shape measurement code, pyRRG

Cited by in corpus (9)

• On the weak lensing masses of a new sample of galaxy groups
• The spatial distribution of satellites in galaxy clusters
• The PAU Survey: Close galaxy pairs identification and analysis
• Accurate dark matter halo elongation from weak-lensing stacking analysis
• Shape and connectivity of groups and clusters: Impact of dynamical state and accretion history
• Subhalos are Anisotropically Distributed and Aligned with the Smooth Matter Distribution of Their Host Halos
• Ellipticities of Galaxy Cluster Halos from Halo-Shear-Shear Correlations
• Halo cluster shapes: Insights from simulated galaxies and ICL with prospects for weak lensing applications
• A CMB lensing analysis of the extended mass distribution of clusters