Weak lensing reconstructions in 2D & 3D: implications for cluster studies

Abstract

We compare the efficiency with which 2D and 3D weak lensing mass mapping techniques are able to detect clusters of galaxies using two state-of-the-art mass reconstruction techniques: MRLens in 2D and GLIMPSE in 3D. We simulate otherwise-empty cluster fields for 96 different virial mass-redshift combinations spanning the ranges $3\times 10^{13}{h}^{-1}{M}_{\odot }\le M_{vir}\le 10^{15}{h}^{-1}{M}_{\odot }$ and $0.05\le z_{\mathrm{cl}}\le 0.75$, and for each generate 1000 realisations of noisy shear data in 2D and 3D. For each field, we then compute the cluster (false) detection rate as the mean number of cluster (false) detections per reconstruction over the sample of 1000 reconstructions. We show that both MRLens and GLIMPSE are effective tools for the detection of clusters from weak lensing measurements, and provide comparable quality reconstructions at low redshift. At high redshift, GLIMPSE reconstructions offer increased sensitivity in the detection of clusters, yielding cluster detection rates up to a factor of $\sim 10\times$ that seen in 2D reconstructions using MRLens. We conclude that 3D mass mapping techniques are more efficient for the detection of clusters of galaxies in weak lensing surveys than 2D methods, particularly since 3D reconstructions yield unbiased estimators of both the mass and redshift of the detected clusters directly.

13 pages, 9 figures; Accepted for publication in MNRAS

References in corpus (20)

• Tracing cosmic evolution with clusters of galaxies
• Cosmology with the shear-peak statistics
• Galaxy clustering in the CFHTLS-Wide: the changing relationship between galaxies and haloes since z ~ 1.2
• Probing dark energy with the shear-ratio geometric test
• Cosmological parameters from combined second- and third-order aperture mass statistics of cosmic shear
• Weak Lensing Mass Reconstruction using Wavelets
• Mass distribution in nearby Abell clusters
• Optimal capture of non-Gaussianity in weak lensing surveys: power spectrum, bispectrum and halo counts
• 3D Photometric Cosmic Shear
• Unfolding the matter distribution using 3-D weak gravitational lensing
• Kinematic deprojection and mass inversion of spherical systems of known velocity anisotropy
• Cosmological constraints from the capture of non-Gaussianity in Weak Lensing data
• A new method to measure the mass of galaxy clusters
• GLIMPSE: Accurate 3D weak lensing reconstructions using sparsity
• Weak Lensing Galaxy Cluster Field Reconstruction
• 3D Reconstruction of the Density Field: An SVD Approach to Weak Lensing Tomography
• A Compressed Sensing Approach to 3D Weak Lensing
• Fast Calculation of the Weak Lensing Aperture Mass Statistic
• Spatial matter density mapping of the STAGES Abell A901/2 supercluster field with 3D lensing
• Improving three-dimensional mass mapping with weak gravitational lensing using galaxy clustering

Cited by in corpus (5)

• Kernel-Based Emulator for the 3D Matter Power Spectrum from CLASS
• Fast multiscale galaxy cluster detection with weak lensing: towards a mass-selected sample
• Mapping dark matter and finding filaments: calibration of lensing analysis techniques on simulated data
• Peaks in weak lensing mass maps for cluster astrophysics and cosmology
• AMICO-WL: an optimal filtering algorithm for galaxy cluster detections with weak lensing