Details

Autor(en) / Beteiligte

• Ade, P A R
• Aghanim, N
• Arnaud, M
• Ashdown, M
• Aumont, J
• Baccigalupi, C
• Banday, A J
• Barreiro, R B
• Barrena, R

Titel

Planck 2015 results: XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources

Ist Teil von

• Astronomy and astrophysics (Berlin), 2016-10, Vol.594, p.A27

Ort / Verlag

United States: EDP Sciences

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 surveyof 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 super(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 sub(5)R500are robust to pressure-profile variation and beam systematics, but accurate conversion to Y sub(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.