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Yayınlanmış 1 Ocak 2016 | Sürüm v1
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Planck 2015 results XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources

Oluşturanlar

  • 1. Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales
  • 2. Univ Paris Sud 11, CNRS, Inst Astrophys Spatiale, UMR8617, Batiment 121, F-91898 Orsay, France
  • 3. Univ Paris Diderot, CEA Saclay, CNRS, Lab AIM,IRFU,Serv Astrophys,CEA,DSM, Bat 709, F-91191 Gif Sur Yvette, France
  • 4. SISSA, Astrophys Sect, Via Bonomea 265, I-34136 Trieste, Italy
  • 5. Univ Cantabria, CSIC, Inst Fis Cantabria, Avda Castros S-N, E-39005 Santander, Spain
  • 6. Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Alan Turing Bldg,Oxford Rd, Manchester M13 9PL, Lancs, England
  • 7. Univ Joseph Fourier Grenoble I, CNRS, Inst Neel, 25 Rue Martyrs, F-38042 Grenoble, France

Açıklama

We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest systematic all-sky survey of galaxy clusters. It contains 1653 detections, of which 1203 are confirmed clusters with identified counterparts in external data sets, and is the first SZ-selected cluster survey containing > 10(3) confirmed clusters. We present a detailed analysis of the survey selection function in terms of its completeness and statistical reliability, placing a lower limit of 83% on the purity. Using simulations, we find that the estimates of the SZ strength parameter Y-5R500 are robust to pressure-profile variation and beam systematics, but accurate conversion to Y-500 requires the use of prior information on the cluster extent. We describe the multi-wavelength search for counterparts in ancillary data, which makes use of radio, microwave, infra-red, optical, and X-ray data sets, and which places emphasis on the robustness of the counterpart match. We discuss the physical properties of the new sample and identify a population of low-redshift X-ray under-luminous clusters revealed by SZ selection. These objects appear in optical and SZ surveys with consistent properties for their mass, but are almost absent from ROSAT X-ray selected samples.

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