Optical galaxy cluster mock catalogs with realistic projection effects: Validations with the SDSS clusters
arXiv:2410.02497 · doi:10.1103/PhysRevD.111.063502
Abstract
Galaxy clusters identified in optical imaging surveys suffer from projection effects: Physically unassociated galaxies along a cluster's line of sight can be counted as its members and boost the observed richness (the number of cluster members). To model the impact of projection on cluster cosmology analyses, we apply a halo occupation distribution model to N-body simulations to simulate the red galaxies contributing to cluster members, and we use the number of galaxies in a cylinder along the line of sight (counts in cylinders) to model the impact of projection on cluster richness. We compare three projection models: uniform, quadratic, and Gaussian, and we convert between them by matching their effective cylinder volumes. We validate our mock catalogs using SDSS redMaPPer clusters' data vectors, including counts vs. richness, stacked lensing signal, spectroscopic redshift distribution of member galaxies, and richness remeasured on a redshift grid. We find the former two are insensitive to the projection model, while the latter two favor a quadratic projection model with a width of approximately 180 Mpc/h (equivalent to the volume of a uniform model with a width of 100 Mpc/h and a Gaussian model with a width of 110 Mpc/h, or a Gaussian redshift error of 0.04). Our framework provides an efficient and flexible way to model optical cluster data vectors, paving the way for a simulation-based joint analysis for clusters, galaxies, and shear.
12 pages, 9 figures; replaced to match published version
References in corpus (49)
- Planck 2015 results. XIII. Cosmological parameters
- The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
- Observational Probes of Cosmic Acceleration
- The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
- The Dark Side of the Halo Occupation Distribution
- Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies
- redMaPPer I: Algorithm and SDSS DR8 Catalog
- Transients from Initial Conditions in Cosmological Simulations
- Scaling relations for galaxy clusters in the Millennium-XXL simulation
- GAMA: towards a physical understanding of galaxy formation
- The Halo Occupation Distribution and the Physics of Galaxy Formation
- Virial Scaling of Massive Dark Matter Halos: Why Clusters Prefer a High Normalization Cosmology
- The redMaPPer Galaxy Cluster Catalog From DES Science Verification Data
- Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances and Weak Lensing
- The Uchuu Simulations: Data Release 1 and Dark Matter Halo Concentrations
- Linking Early and Late Type Galaxies to their Dark Matter Haloes
- Dark Matter Halo Profiles of Massive Clusters: Theory vs. Observations
- redMaGiC: Selecting Luminous Red Galaxies from the DES Science Verification Data
- Robust Optical Richness Estimation with Reduced Scatter
- Growth of Cosmic Structure: Probing Dark Energy Beyond Expansion
- Optical-to-virial velocity ratios of local disk galaxies from combined kinematics and galaxy-galaxy lensing
- redMaPPer IV: Photometric Membership Identification of Cluster Galaxies with 1% Precision
- GreeM : Massively Parallel TreePM Code for Large Cosmological N-body Simulations
- On the Level of Cluster Assembly Bias in SDSS
- Populating Dark Matter Haloes with Galaxies: Comparing the 2dFGRS with Mock Galaxy Redshift Surveys
- Dark Energy Survey Year 1 Results: Cosmological Constraints from Cluster Abundances, Weak Lensing, and Galaxy Correlations
- Modeling projection effects in optically-selected cluster catalogues
- Assembly Bias and Splashback in Galaxy Clusters
- Dark Energy Survey Year 1 Results: Calibration of Cluster Mis-centering in the redMaPPer Catalogs
- The three-year shear catalog of the Subaru Hyper Suprime-Cam SSP Survey
- Galaxy Cluster Mass Estimation from Stacked Spectroscopic Analysis
- Optical selection bias and projection effects in stacked galaxy cluster weak lensing
- Red Sequence Cluster Finding in the Millennium Simulation
- On the measurements of assembly bias and splashback radius using optically selected galaxy clusters
- Spectroscopic Quantification of Projection Effects in the SDSS redMaPPer Galaxy Cluster Catalogue
- Galaxy Cluster Mass Reconstruction Project - IV. Understanding the effects of imperfect membership on cluster mass estimation
- Cosmology with Stacked Cluster Weak Lensing and Cluster-Galaxy Cross-Correlations
- Disentangling correlated scatter in cluster mass measurements
- Combination of cluster number counts and two-point correlations: Validation on Mock Dark Energy Survey
- The HectoMAP Cluster Survey - I. redMaPPer Clusters
- The geometry of the filamentary environment of galaxy clusters
- Influence of Projection in Cluster Cosmology Studies
- Localizing Transformations of the Galaxy-Galaxy Lensing Observable
- Cosmology with galaxy cluster weak lensing: statistical limits and experimental design
- Velocity Dispersions of Clusters in the Dark Energy Survey Y3 redMaPPer Catalog
- Observational constraints of an anisotropic boost due to the projection effects using redMaPPer clusters
- Self-calibrating optical galaxy cluster selection bias using cluster, galaxy, and shear cross-correlations
- The picasso gas model: Painting intracluster gas on gravity-only simulations
- Optimization and Quality Assessment of Baryon Pasting for Intracluster Gas using the Borg Cube Simulation