Exploring the contamination of the DES-Y1 Cluster Sample with SPT-SZ selected clusters

Abstract

We perform a cross validation of the cluster catalog selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DES-Y1) data by matching it with the Sunyaev-Zel'dovich effect (SZE) selected cluster catalog from the South Pole Telescope SPT-SZ survey. Of the 1005 redMaPPer selected clusters with measured richness $\hat{\lambda }>40$ in the joint footprint, 207 are confirmed by SPT-SZ. Using the mass information from the SZE signal, we calibrate the richness--mass relation using a Bayesian cluster population model. We find a mass trend $\lambda \propto M^B$ consistent with a linear relation ($B\sim 1$), no significant redshift evolution and an intrinsic scatter in richness of ${\sigma }_{\lambda }=0.22\pm 0.06$. At low richness SPT-SZ confirms fewer redMaPPer clusters than expected. We interpret this richness dependent deficit in confirmed systems as due to the increased presence at low richness of low mass objects not correctly accounted for by our richness-mass scatter model, which we call contaminants. At a richness $\hat{\lambda }=40$, this population makes up $>$12$\%$ (97.5 percentile) of the total population. Extrapolating this to a measured richness $\hat{\lambda }=20$ yields $>$22$\%$ (97.5 percentile). With these contamination fractions, the predicted redMaPPer number counts in different plausible cosmologies are compatible with the measured abundance. The presence of such a population is also a plausible explanation for the different mass trends ($B\sim 0.75$) obtained from mass calibration using purely optically selected clusters. The mean mass from stacked weak lensing (WL) measurements suggests that these low mass contaminants are galaxy groups with masses $\sim 3$-$5\times 10^{13}$ M${}_{\odot }$ which are beyond the sensitivity of current SZE and X-ray surveys but a natural target for SPT-3G and eROSITA.

arXiv comment20 pages, 16 figures

References in corpus (81)

• emcee: The MCMC Hammer
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Cosmological Parameters from Observations of Galaxy Clusters
• The Dark Energy Survey: more than dark energy - an overview
• redMaPPer I: Algorithm and SDSS DR8 Catalog
• Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey
• The 10 Meter South Pole Telescope
• The ROSAT-ESO Flux Limited X-ray (REFLEX) Galaxy Cluster Survey. V. The cluster catalogue
• Properties of the Intracluster Medium in an Ensemble of Nearby Galaxy Clusters
• Scaling relations for galaxy clusters in the Millennium-XXL simulation
• eROSITA Science Book: Mapping the Structure of the Energetic Universe
• A Catalog of 200 Galaxy Clusters Serendipitously Detected in the ROSAT PSPC Pointed Observations
• Cluster Cosmology Constraints from the 2500 deg${}^2$ SPT-SZ Survey: Inclusion of Weak Gravitational Lensing Data from Magellan and the Hubble Space Telescope
• The redMaPPer Galaxy Cluster Catalog From DES Science Verification Data
• A Measurement of the Cosmic Microwave Background Damping Tail from the 2500-square-degree SPT-SZ survey
• Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations
• Planck 2015 results. XXVII. The Second Planck Catalogue of Sunyaev-Zeldovich Sources
• Weighing the Giants IV: Cosmology and Neutrino Mass
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing
• Galaxy clusters discovered via the Sunyaev-Zel'dovich effect in the first 720 square degrees of the South Pole Telescope survey
• Cosmological Constraints from Galaxy Clusters in the 2500 square-degree SPT-SZ Survey
• Cosmological Constraints from Sunyaev-Zel'dovich-Selected Clusters with X-ray Observations in the First 178 Square Degrees of the South Pole Telescope Survey
• The ROSAT-ESO Flux Limited X-Ray (REFLEX) Galaxy Cluster Survey I: The Construction of the Cluster Sample
• The Cluster-EAGLE project: global properties of simulated clusters with resolved galaxies
• Dark Energy Survey Year 1 Results: Weak Lensing Mass Calibration of redMaPPer Galaxy Clusters
• Catalog Extraction in SZ Cluster Surveys: a matched filter approach
• Dark Matter Halo Profiles of Massive Clusters: Theory vs. Observations
• The SPTpol Extended Cluster Survey
• Weak Lensing Measurement of the Mass--Richness Relation of SDSS redMaPPer Clusters
• Massive Halos in Millennium Gas Simulations: Multivariate Scaling Relations
• The Atacama Cosmology Telescope: The Two-Season ACTPol Sunyaev-Zel'dovich Effect Selected Cluster Catalog
• Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion ${\sigma }_v$ and X-ray $Y_{\text{X}}$ Measurements
• redMaPPer II: X-ray and SZ Performance Benchmarks for the SDSS Catalog
• Weighing the Giants V: Galaxy Cluster Scaling Relations
• Dark Energy Survey Year 1 Results: Methods for Cluster Cosmology and Application to the SDSS
• Constraints on the Richness-Mass Relation and the Optical-SZE Positional Offset Distribution for SZE-Selected Clusters
• X-ray Properties of SPT Selected Galaxy Clusters at 0.2<z<1.5 Observed with XMM-Newton
• Planck 2013 results. XXIX. The Planck catalogue of Sunyaev-Zeldovich sources: Addendum
• Simultaneous Falsification of LCDM and Quintessence with Massive, Distant Clusters
• The XMM Large Scale Structure survey: The X-ray pipeline and survey selection function
• Baryon Content in a Sample of 91 Galaxy Clusters Selected by the South Pole Telescope at 0.2 < z < 1.25
• Cosmological Constraints from DES Y1 Cluster Abundances and SPT Multi-wavelength data
• Cosmological hydrodynamical simulations of galaxy clusters: X-ray scaling relations and their evolution
• Constraints on the mass-richness relation from the abundance and weak lensing of SDSS clusters
• Modeling projection effects in optically-selected cluster catalogues
• redMaPPer III: A Detailed Comparison of the Planck 2013 and SDSS DR8 RedMaPPer Cluster Catalogs
• Galaxy Clusters Selected via the Sunyaev-Zel'dovich Effect in the SPTpol 100-Square-Degree Survey
• The mass-richness relation of optically-selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data
• Galaxy Cluster Mass Estimation from Stacked Spectroscopic Analysis
• A New RASS Galaxy Cluster Catalog with Low Contamination Extending to $z\sim 1$ in the DES Overlap Region
• eROSITA on SRG
• A Multi-component Matched Filter Cluster Confirmation Tool for eROSITA: Initial Application to the RASS and DES-SV Datasets
• LoCuSS: Scaling relations between galaxy cluster mass, gas, and stellar content
• Localized massive halo properties in Bahamas and Macsis simulations: scalings, log-normality, and covariance
• Galaxy Populations in Massive Galaxy Clusters to z=1.1: Color Distribution, Concentration, Halo Occupation Number and Red Sequence Fraction
• Orientation Bias of Optically Selected Galaxy Clusters and Its Impact on Stacked Weak Lensing Analyses
• The XMM-LSS survey: the Class 1 cluster sample over the extended 11 deg${}^2$ and its spatial distribution
• A Measurement of CMB Cluster Lensing with SPT and DES Year 1 Data
• Red Sequence Cluster Finding in the Millennium Simulation
• Detection of anti-correlation of hot and cold baryons in galaxy clusters
• Consistency tests in cosmology using relative entropy
• Stellar Property Statistics of Massive Halos from Cosmological Hydrodynamics Simulations: Common Kernel Shapes
• Rhapsody-G simulations: galaxy clusters as baryonic closed boxes and the covariance between hot gas and galaxies
• Mass Calibration of Optically Selected DES clusters using a Measurement of CMB-Cluster Lensing with SPTpol Data
• Spectroscopic Quantification of Projection Effects in the SDSS redMaPPer Galaxy Cluster Catalogue
• The Selection Function of SZ Cluster Surveys
• Dark Energy Survey internal consistency tests of the joint cosmological probes analysis with posterior predictive distributions
• Galaxy Kinematics and Mass Calibration in Massive SZE Selected Galaxy Clusters to z=1.3
• A Parametrized Galaxy Catalog Simulator For Testing Cluster Finding, Mass Estimation and Photometric Redshift Estimation in Optical and Near Infrared Surveys
• Mass Calibration of the CODEX Cluster Sample using SPIDERS Spectroscopy -- I. The Richness-Mass Relation
• Halo Exclusion Criteria Impacts Halo Statistics
• Mass Variance from Archival X-ray Properties of Dark Energy Survey Year-1 Galaxy Clusters
• A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol
• Weak Lensing Analysis of CODEX Clusters using Dark Energy Camera Legacy Survey : Mass-Richness Relation
• Impact of Weak Lensing Mass Calibration on eROSITA Galaxy Cluster Cosmological Studies -- a Forecast
• Optical-SZE Scaling Relations for DES Optically Selected Clusters within the SPT-SZ Survey
• On Model Selection in Cosmology
• High Frequency Cluster Radio Galaxies: Luminosity Functions and Implications for SZE Selected Cluster Samples
• Effects of Completeness and Purity on Cluster Dark Energy Constraints
• Validation of Selection Function, Sample Contamination and Mass Calibration in Galaxy Cluster Samples
• CoMaLit -- VI. Intrinsic scatter in stacked relations. The weak lensing AMICO galaxy clusters in KiDS-DR3

Cited by in corpus (20)

• Euclid. I. Overview of the Euclid mission
• The DECam Local Volume Exploration Survey: Overview and First Data Release
• The SRG/eROSITA all-sky survey: Cosmology constraints from cluster abundances in the western Galactic hemisphere
• Optical selection bias and projection effects in stacked galaxy cluster weak lensing
• The SRG/eROSITA All-Sky Survey: Dark Energy Survey Year 3 Weak Gravitational Lensing by eRASS1 selected Galaxy Clusters
• A measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel'dovich effect with SPT-3G and DES
• The SRG/eROSITA All-Sky Survey: Constraints on AGN Feedback in Galaxy Groups
• The SRG-eROSITA All-Sky Survey : Constraints on f(R) Gravity from Cluster Abundance
• Atacama Cosmology Telescope measurements of a large sample of candidates from the Massive and Distant Clusters of WISE Survey: Sunyaev-Zeldovich effect confirmation of MaDCoWS candidates using ACT
• Velocity Dispersions of Clusters in the Dark Energy Survey Y3 redMaPPer Catalog
• The XMM Cluster Survey analysis of the SDSS DR8 redMaPPer Catalogue: Implications for scatter, selection bias, and isotropy in cluster scaling relations
• The SRG/eROSITA all-sky survey. X-ray emission from the warm-hot phase gas in long cosmic filaments
• The PSZ-MCMF catalogue of Planck clusters over the DES region
• The effect of selection -- a tale of cluster mass measurement bias induced by correlation and projection
• Miscentering of Optical Galaxy Clusters Based on Sunyaev-Zeldovich Counterparts
• The XMM Cluster Survey: Exploring scaling relations and completeness of the Dark Energy Survey Year 3 redMaPPer cluster catalogue
• Improving Galaxy Cluster Selection with the Outskirt Stellar Mass of Galaxies
• Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections
• Strong Conformity and Assembly Bias: Towards a Physical Understanding of the Galaxy-Halo Connection in SDSS Clusters
• Dark Energy Survey Year 3 Results: Mis-centering calibration and X-ray-richness scaling relations in redMaPPer clusters