GALAXY CLUSTERS DISCOVERED VIA THE SUNYAEV–ZEL'DOVICH EFFECT IN THE 2500-SQUARE-DEGREE SPT-SZ SURVEY

By L. Bleem, B. Stalder, T. Haan, K. Aird, S. Allen, D. Applegate, M. Ashby, M. Bautz, M. Bayliss, B. Benson and 64 more. 2014

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We present a catalog of galaxy clusters selected via their Sunyaev–Zel'dovich (SZ) effect signature from 2500 deg2 of South Pole Telescope (SPT) data. This work represents the complete sample of clusters detected at high significance in the 2500 deg2 SPT-SZ survey, which was completed in 2011. A total of 677 (409) cluster candidates are identified above a signal-to-noise threshold of ξ = 4.5 (5.0). Ground- and space-based optical and near-infrared (NIR) imaging confirms overdensities of similarly colored galaxies in the direction of 516 (or 76%) of the ξ > 4.5 candidates and 387 (or 95%) of the ξ > 5 candidates; the measured purity is consistent with expectations from simulations. Of these confirmed clusters, 415 were first identified in SPT data, including 251 new discoveries reported in this work. We estimate photometric redshifts for all candidates with identified optical and/or NIR counterparts; we additionally report redshifts derived from spectroscopic observations for 141 of these systems. The mass threshold of the catalog is roughly independent of redshift above z ∼ 0.25 leading to a sample of massive clusters that extends to high redshift. The median mass of the sample is M500c(ρcrit) , the median redshift is zmed = 0.55, and the highest-redshift systems are at z > 1.4. The combination of large redshift extent, clean selection, and high typical mass makes this cluster sample of particular interest for cosmological analyses and studies of cluster formation and evolution.

Subfields: Astronomy and Astrophysics, Instrumentation

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Citations in the corpus

Weak Lensing Measurement of the Mass--Richness Relation of SDSS redMaPPer Clusters (2016, methodology): “Saro et al. (2015, hereafter referred to simply as Saro) calibrated the richness–mass relation for redMaPPer clusters in the Dark Energy Survey Science (DES) Verification data by cross-matching DES redMaPPer clusters to clusters found by the South Pole Telescope (SPT Bleem et al. 2015).”
CMB-S4 Science Case, Reference Design, and Project Plan (2019, background): “Cumulative number of clusters above a fixed redshift for published (solid [431, 432, 433]), and upcoming (dashed [429, 49]) CMB cluster samples.”
SPT-3G: a next-generation cosmic microwave background polarization experiment on the South Pole telescope (2014, background): “The spt-sz survey observed 2500 deg(2) of sky with an unprecedented combination of angular resolution (∼1 arcmin) and depth at mm-wavelengths, achieving a noise level of approximately 36, 16, and 62 μK-arcmin∗ at 95, 150, and 220 GHz, respectively .(8) The spt-pol survey observes at 95 and 150 GHz, ”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, background): “…of galaxy clusters with relatively well-defined selection functions through the thermal Sunyaev–Zel’dovich effect (e.g. Hasselfield et al. 2013; Bleem et al. 2015; Planck Collaboration et al. 2016c), and improvements in the calibration of cluster masses (Applegate et al. 2014; Hoekstra et…”
Weighing the giants – IV. Cosmology and neutrino mass (2014, methodology): “…measurements out to z ≈ 1.5 by combining the RASS X-ray survey with an SZ survey with similar area and depth to the 2500 square degree SPT survey (Bleem et al. 2014), and including available X-ray and lensing follow-up data, should improve the dark energy constraints shown in Figure 6 by a…”
The SPTpol Extended Cluster Survey (2019, methodology): “We separate bright stars and galaxies using the SG statistic (Bleem et al. 2015a) and use these stars to calibrate the photometry with stellar locus regression (High et al. 2009); absolute magnitudes are set using the Two Micron All Sky Survey (2MASS) point-source catalog (Skrutskie et al. 2006).”
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COSMOLOGICAL CONSTRAINTS FROM GALAXY CLUSTERS IN THE 2500 SQUARE-DEGREE SPT-SZ SURVEY (2016, methodology): “In this work, we have taken a well-defined subsample of the SPT cluster catalog from Bleem et al. (2015), selecting only for redshift z > 0.25 and SPT-SZ detection significance ξ > 5.”
The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters (2020, methodology): “In particular, we used redshifts from previously published SZ surveys by ACT (Menanteau et al. 2013; Sifón et al. 2016; Hilton et al. 2018), Planck (Planck Collaboration et al. 2016b), and SPT (Bleem et al. 2015b, 2020; Bocquet et al. 2019); optically selected cluster catalogs based on SDSS (Wen et ”
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Diffuse Radio Emission from Galaxy Clusters (2019, background): “Low-resolution stud- ies measuring the bulk SZ signal have been very successful at selecting large samples of both relaxed and disturbed clusters up to z ∼1.5 (e.g., Planck Collaboration et al. 2016; Bleem et al. 2015).”
Baryon impact on the halo mass function: Fitting formulae and implications for cluster cosmology (2015, unknown): “4 and cf. Bleem et al. 2015).”