The Contribution of Radio Galaxy Contamination to Measurements of the Sunyaev-Zel'dovich Decrement in Massive Galaxy Clusters at 140 GHz with Bolocam

Abstract

We describe in detail our characterization of the compact radio source population in 140 GHz Bolocam observations of a set of 45 massive galaxy clusters. We use a combination of 1.4 and 30 GHz data to select a total of 28 probable cluster-member radio galaxies and also to predict their 140 GHz flux densities. All of these galaxies are steep-spectrum radio sources and they are found preferentially in the cool-core clusters within our sample. In particular, 11 of the 12 brightest cluster member radio sources are associated with cool-core systems. Although none of the individual galaxies are robustly detected in the Bolocam data, the ensemble-average flux density at 140 GHz is consistent with, but slightly lower than, the extrapolation from lower frequencies assuming a constant spectral index. In addition, our data indicate an intrinsic scatter of 30 percent around the power-law extrapolated flux densities at 140 GHz, although our data do not tightly constrain this scatter. For our cluster sample, which is composed of high-mass and moderate-redshift systems, we find that the maximum fractional change in the Sunyaev-Zel'dovich signal integrated over any single cluster due to the presence of these radio sources is 20 percent, and only 1/4 of the clusters show a fractional change of more than 1 percent. The amount of contamination is strongly dependent on cluster morphology, and nearly all of the clusters with more than 1 percent contamination are cool-core systems. This result indicates that radio contamination is not significant compared to current noise levels in 140 GHz images of massive clusters and is in good agreement with the level of radio contamination found in previous results based on lower frequency data or simulations.

arXiv commentUpdated per referee's comments

References in corpus (49)

• The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the Y_SZ-M_500 relation
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. II. The Source Catalogue
• Galaxy cluster X-ray luminosity scaling relations from a representative local sample (REXCESS)
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission
• The VLA Low-frequency Sky Survey
• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. I. Science goals, survey design and instrumentation
• Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample
• Extragalactic millimeter-wave sources in South Pole Telescope survey data: source counts, catalog, and statistics for an 87 square-degree field
• Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations
• Radio and Millimeter Continuum Surveys and their Astrophysical Implications
• The Atacama Cosmology Telescope: Sunyaev Zel'dovich Selected Galaxy Clusters at 148 GHz in the 2008 Survey
• Images, structural properties and metal abundances of galaxy clusters observed with Chandra ACIS-I at 0.1<z<1.3
• The Observed Growth of Massive Galaxy Clusters II: X-ray Scaling Relations
• A measurement of secondary cosmic microwave background anisotropies with two years of South Pole Telescope observations
• The Molonglo Galactic Plane Survey (MGPS-2): Compact Source Catalogue
• Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zel'dovich Effect
• Simulations of the Microwave Sky
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectrum at 148 and 218 GHz from the 2008 Southern Survey
• X-ray Properties of the First SZE-selected Galaxy Cluster Sample from the South Pole Telescope
• Self-similar scaling and evolution in the galaxy cluster X-ray Luminosity-Temperature relation
• AGN heating and ICM cooling in the HIFLUGCS sample of galaxy clusters
• Every BCG with a strong radio AGN has an X-ray cool core: is the cool core - noncool core dichotomy too simple?
• Modeling the evolution of infrared galaxies: A Parametric backwards evolution model
• Substructure of the galaxy clusters in the REXCESS sample: observed statistics and comparison to numerical simulations
• Planck Early Results: Statistical properties of extragalactic radio sources in the Planck Early Release Compact Source Catalogue
• The properties of extragalactic radio sources selected at 20 GHz
• High--frequency predictions for number counts and spectral properties of extragalactic radio sources. New evidences of a break at mm wavelengths in spectra of bright blazar sources
• A Panoramic Mid-infrared Survey of Two Distant Clusters
• The Relation Between Cool Cluster Cores and Herschel-Detected Star Formation in Brightest Cluster Galaxies
• The Atacama Cosmology Telescope: Extragalactic Sources at 148 GHz in the 2008 Survey
• Observations of High-Redshift X-Ray Selected Clusters with the Sunyaev-Zel'dovich Array
• A model for the cosmological evolution of low frequency radio sources
• IR observations of MS 1054-03: Star Formation and its Evolution in Rich Galaxy Clusters
• Strong dusty bursts of star formation in galaxies falling into the cluster RXJ0152.7-1357
• Comparison of Pressure Profiles of Massive Relaxed Galaxy Clusters using Sunyaev-Zel'dovich and X-ray Data
• Radio Sources Toward Galaxy Clusters at 30 GHz
• Spectral Energy Distribution of Radio Sources in Nearby Clusters of Galaxies: Implications for Sunyaev-Zel'dovich Effect Surveys
• Radio Sources in Galaxy Clusters at 28.5 GHz
• Submillimeter detection of the Sunyaev -- Zel'dovich effect toward the most luminous X-ray cluster at z=0.45
• Cluster morphologies and model-independent Y_SZ estimates from Bolocam Sunyaev-Zel'dovich images
• Extended SZ map of the most luminous X-ray cluster, RXJ1347-1145
• The extragalactic radio-source population at 95 GHz
• Dust-Obscured Star-Formation in Intermediate Redshift Galaxy Clusters
• High-frequency radio observations of the Kuehr sample and the epoch-dependent luminosity function of the flat-spectrum quasars
• Origin of the Counter-Rotating Gas in NGC 1596
• 143 GHz brightness measurements of Uranus, Neptune, and other secondary calibrators with Bolocam between 2003 and 2010
• Radio Sources from a 31 GHz Sky Survey with the Sunyaev-Zel'dovich Array
• Bolocam Observations of Two Unconfirmed Galaxy Cluster Candidates from the Planck Early SZ Sample
• Radio source contamination of the Sunyaev-Zeldovich effect in galaxy clusters

Cited by in corpus (25)

• The Atacama Cosmology Telescope: Sunyaev-Zel'dovich Selected Galaxy Clusters at 148 GHz from Three Seasons of Data
• The Growth of Cool Cores and Evolution of Cooling Properties in a Sample of 83 Galaxy Clusters at 0.3 < z < 1.2 Selected from the SPT-SZ Survey
• The cool core state of Planck SZ-selected clusters versus X-ray selected samples: evidence for cool core bias
• Sunyaev-Zel'dovich-Measured Pressure Profiles from the Bolocam X-ray/SZ Galaxy Cluster Sample
• High angular resolution Sunyaev-Zel'dovich observations of MACS J1423.8+2404 with NIKA: Multiwavelength analysis
• A Measurement of the Kinetic Sunyaev-Zel'dovich Signal Toward MACS J0717.5+3745
• Galaxy Cluster Scaling Relations between Bolocam Sunyaev-Zel'dovich Effect and Chandra X-ray Measurements
• High Radio Frequency Properties and Variability of Brightest Cluster Galaxies
• Imaging the Thermal and Kinematic Sunyaev-Zel'dovich Effect Signals in a Sample of Ten Massive Galaxy Clusters: Constraints on Internal Velocity Structures and Bulk Velocities
• A Measurement of the Millimeter Emission and the Sunyaev-Zel'dovich Effect Associated with Low-Frequency Radio Sources
• A comparative study of radio halo occurrence in SZ and X-ray selected galaxy cluster samples
• Galaxy Cluster Pressure Profiles as Determined by Sunyaev Zel'dovich Effect Observations with MUSTANG and Bolocam II: Joint Analysis of Fourteen Clusters
• Constraints on the Mass, Concentration, and Nonthermal Pressure Support of Six CLASH Clusters from a Joint Analysis of X-ray, SZ, and Lensing Data
• Thermodynamic Profiles of Galaxy Clusters from a Joint X-ray/SZ Analysis
• Peculiar Velocity Constraints from Five-Band SZ Effect Measurements Towards RX J1347.5-1145 with MUSIC and Bolocam from the CSO
• Exploiting NIKA2/XMM-Newton imaging synergy for intermediate mass, high-$z$ galaxy clusters within the NIKA2 SZ Large Program
• Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters
• Optimizing measurements of cluster velocities and temperatures for CCAT-prime and future surveys
• 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
• JVLA 1.5GHz continuum observation of CLASH clusters I: radio properties of the BCGs
• Measurement of the Relativistic Sunyaev-Zeldovich Corrections in RX J1347.5-1145
• CHEX-MATE: CLUster Multi-Probes in Three Dimensions (CLUMP-3D), I. Gas Analysis Method using X-ray and Sunyaev-Zel'dovich Effect Data
• The Atacama Cosmology Telescope: The LABOCA/ACT Survey of Clusters at All Redshifts
• CARMA observations of massive Planck-discovered cluster candidates at z>0.5 associated with WISE overdensities: Breaking the size-flux degeneracy
• Resolving the Merging Planck Cluster PLCK G147.3-16.6 with GISMO