Using Weak Lensing to find Halo Masses

Abstract

Since the strength of weak gravitational lensing is proportional to the mass along the line of sight, it might be possible to use lensing data to find the masses of individual dark matter clusters. Unfortunately, the effect on the lensing field of other matter along the line of sight is substantial. We investigate to what extent we can correct for these projection effects if we have additional information about the most massive halos along the line of sight from deep optical data. We conclude that unless we know the masses and positions of halos down to a very low mass, we can only correct for a small part of the line-of-sight projection, which makes it very hard to get accurate mass estimates of individual halos from lensing data.

arXiv comment16 pages, 9 figures, to be submitted to New Astronomy

References in corpus (22)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Profiles of dark haloes: evolution, scatter, and environment
• Analytic model for galaxy and dark matter clustering
• Simulations of X-ray Clusters
• An excursion set model of hierarchical clustering: Ellipsoidal collapse and the moving barrier
• Cluster Abundance Constraints on Quintessence Models
• The Dark Side of the Halo Occupation Distribution
• Power Spectra for Cold Dark Matter and its Variants
• Weak Gravitational Lensing by Large-Scale Structure
• Deriving the Nonlinear Cosmological Power Spectrum and Bispectrum from Analytic Dark Matter Halo Profiles and Mass Functions
• Ray Tracing Simulations of Weak Lensing by Large-Scale Structure
• The mass function
• A New Algorithm for Computing Statistics of Weak Lensing by Large-Scale Structure
• A Merged Catalog of Clusters of Galaxies from Early SDSS Data
• Simulating weak lensing by large scale structure
• Completeness in Weak Lensing Searches for Clusters
• Shear Selected Cluster Cosmology I: Tomography and Optimal Filtering
• The Effect of the Cosmic Web on Cluster Weak Lensing Mass Estimates
• Mining Weak Lensing Surveys
• Weak Lensing by Large-Scale Structure: A Dark Matter Halo Approach
• Mock Catalogs for the DEEP2 redshift survey

Cited by in corpus (28)

• A MaxBCG Catalog of 13,823 Galaxy Clusters from the Sloan Digital Sky Survey
• On the Accuracy of Weak Lensing Cluster Mass Reconstructions
• A Weak Lensing Study of X-ray Groups in the COSMOS survey: Form and Evolution of the Mass-Luminosity Relation
• Masses of galaxy clusters from gravitational lensing
• Massive Halos in Millennium Gas Simulations: Multivariate Scaling Relations
• Detailed cluster lensing profiles at large radii and the impact on cluster weak lensing studies
• Cluster Galaxy Dynamics and the Effects of Large Scale Environment
• The Cluster Mass Function from Weak Gravitational Lensing
• Effects of large-scale structure on the accuracy of weak lensing mass measurements
• Weak lensing survey of galaxy clusters in the CFHTLS Deep
• Cross-Correlation Lensing: Determining Galaxy and Cluster Mass Profiles from Statistical Weak Lensing Measurements
• Caustic and Weak Lensing Estimators of Galaxy Cluster Masses
• Measuring the Mass Distribution in Galaxy Clusters
• The cosmology dependence of weak lensing cluster counts
• The Formation Histories of Galaxy Clusters
• Combined analysis of weak lensing and X-ray blind surveys
• Calibration of the Mass-Temperature Relation for Clusters of Galaxies Using Weak Gravitational Lensing
• Measuring primordial non-Gaussianity through weak lensing peak counts
• The impact of correlated projections on weak lensing cluster counts
• Constraining Cosmology with High Convergence Regions in Weak Lensing Surveys
• Disentangling correlated scatter in cluster mass measurements
• Probing the Relation Between X-ray-Derived and Weak-Lensing-Derived Masses for Shear-Selected Galaxy Clusters: I. A781
• Constraining Dark Energy by Combining Cluster Counts and Shear-Shear Correlations in a Weak Lensing Survey
• 3D Reconstruction of the Density Field: An SVD Approach to Weak Lensing Tomography
• The geometry of the filamentary environment of galaxy clusters
• Testing Weak Lensing Maps With Redshift Surveys: A Subaru Field
• Characterizing the Shapes of Galaxy Clusters Using Moments of the Gravitational Lensing Shear
• The impact of projection effects on cluster observables: stacked lensing and projected clustering