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Title: High–frequency cluster radio galaxies: Luminosity functions and implications for SZE–selected cluster samples

We study the overdensity of point sources in the direction of X-ray-selected galaxy clusters from the meta-catalogue of X-ray-detected clusters of galaxies (MCXC; < z > = 0.14) at South Pole Telescope (SPT) and Sydney University Molonglo Sky Survey (SUMSS) frequencies. Flux densities at 95, 150 and 220 GHz are extracted from the 2500 deg 2 SPT-SZ survey maps at the locations of SUMSS sources, producing a multifrequency catalogue of radio galaxies. In the direction of massive galaxy clusters, the radio galaxy flux densities at 95 and 150 GHz are biased low by the cluster Sunyaev–Zel’dovich Effect (SZE) signal, which is negative at these frequencies. We employ a cluster SZE model to remove the expected flux bias and then study these corrected source catalogues. We find that the high-frequency radio galaxies are centrally concentrated within the clusters and that their luminosity functions (LFs) exhibit amplitudes that are characteristically an order of magnitude lower than the cluster LF at 843 MHz. We use the 150 GHz LF to estimate the impact of cluster radio galaxies on an SPT-SZ like survey. The radio galaxy flux typically produces a small bias on the SZE signal and has negligible impact on the observed scattermore » in the SZE mass–observable relation. If we assume there is no redshift evolution in the radio galaxy LF then 1.8 ± 0.7 per cent of the clusters with detection significance ξ ≥ 4.5 would be lost from the sample. As a result, allowing for redshift evolution of the form (1 + z) 2.5 increases the incompleteness to 5.6 ± 1.0 per cent. Improved constraints on the evolution of the cluster radio galaxy LF require a larger cluster sample extending to higher redshift.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [2] ;  [5] ;  [6] ;  [7] ;  [8] ;  [2] ;  [2] ;  [9] ;  [10] ;  [2] ;  [11]
  1. Ludwig-Maximilians-Univ., Munich (Germany); Excellence Cluster Universe, Garching (Germany); Max Planck Institute for Extraterrestrial Physics, Garching (Germany)
  2. Ludwig-Maximilians-Univ., Munich (Germany); Excellence Cluster Universe, Garching (Germany)
  3. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Ludwig-Maximilians-Univ., Munich (Germany); Excellence Cluster Universe, Garching (Germany); Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Ludwig-Maximilians-Univ., Munich (Germany); Excellence Cluster Universe, Garching (Germany); Academia Sinica Institute of Astronomy and Astrophysics, Taipei (Taiwan)
  7. Univ. of Chicago, Chicago, IL (United States)
  8. Univ. of California, Berkeley, CA (United States); McGill Univ., Montreal, QC (Canada)
  9. Univ. of California, Berkeley, CA (United States)
  10. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  11. Univ. of Melbourne, Parkville, VIC (Australia)
Publication Date:
Report Number(s):
FERMILAB-PUB-16-209-AE-PPD
Journal ID: ISSN 0035-8711; 127894; TRN: US1702462
Grant/Contract Number:
AC02-06CH11357; AC02-07CH11359; PLR-1248097; PHY-1125897; GBMF 947
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 467; Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
Gordon and Betty Moore Foundation; National Science Foundation (NSF); German Research Foundation (DFG); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
SPT Collaboration
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: active; galaxies: clusters: general; galaxies: luminosity function; mass function; cosmology: observations; submillimetre: galaxies
OSTI Identifier:
1363627
Alternate Identifier(s):
OSTI ID: 1366529