TY - JOUR
T1 - Planck 2015 results. XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources
AU - Ade, P.A.R.
AU - Aghanim, N.
AU - Arnaud, M.
AU - Ashdown, M.
AU - Aumont, J.
AU - Baccigalupi, C.
AU - Banday, A.J.
AU - Barreiro, R.B.
AU - Barrena, R.
AU - Bartlett, J. G.
AU - Nasselski, Pavel
AU - Christensen, Per Rex
AU - Frejsel, Anne Mette
AU - Novikov, Igor Dmitrievich
AU - Nørgaard-Nielsen, Hans Ulrik
PY - 2016/10/1
Y1 - 2016/10/1
N2 - 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 >103 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 Y5R500are robust to pressure-profile variation and beam systematics, but accurate conversion to Y500 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.
AB - 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 >103 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 Y5R500are robust to pressure-profile variation and beam systematics, but accurate conversion to Y500 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.
U2 - 10.1051/0004-6361/201525823
DO - 10.1051/0004-6361/201525823
M3 - Journal article
SN - 0004-6361
VL - 594
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
M1 - A27
ER -