Mass calibration of distant SPT galaxy clusters through expanded weak-lensing follow-up observations with HST, VLT, & Gemini-South
Monthly Notices of the Royal Astronomical Society, vol. 505, pp. 3923–3943
Abstract
ABSTRACT Expanding from previous work, we present weak-lensing (WL) measurements for a total sample of 30 distant (zmedian = 0.93) massive galaxy clusters from the South Pole Telescope Sunyaev–Zel’dovich (SPT-SZ) Survey, measuring galaxy shapes in Hubble Space Telescope (HST) Advanced Camera for Surveys images. We remove cluster members and preferentially select z ≳ 1.4 background galaxies via V − I colour, employing deep photometry from VLT/FORS2 and Gemini-South/GMOS. We apply revised calibrations for the WL shape measurements and the source redshift distribution to estimate the cluster masses. In combination with earlier Magellan/Megacam results for lower-redshifts clusters, we infer refined constraints on the scaling relation between the SZ detection significance and the cluster mass, in particular regarding its redshift evolution. The mass scale inferred from the WL data is lower by a factor $0.76^{+0.10}_{-0.14}$ (at our pivot redshift z = 0.6) compared to what would be needed to reconcile a flat Planck νΛCDM cosmology (in which the sum of the neutrino masses is a free parameter) with the observed SPT-SZ cluster counts. In order to sensitively test the level of (dis-)agreement between SPT clusters and Planck, further expanded WL follow-up samples are needed.
Authors 20
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T. Schrabback corresponding
Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
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Excellence Cluster Origins · Ludwig-Maximilians-Universität München
Affiliation as printed
Excellence Cluster ORIGINS , Boltzmannstr. 2, D-85748 Garching, Germany
Faculty of Physics, Ludwig-Maximilians University , Scheinerstr. 1, D-81679 München, Germany
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Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
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Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
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University of Bonn · Ruhr University Bochum
Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
Ruhr-University Bochum, Astronomical Institute , German Centre for Cosmological Lensing, Universitätsstr. 150, D-44801 Bochum, Germany
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Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University , Niels Bohrweg 2, NL-2300 CA Leiden, the Netherlands
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
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University of Bonn · University of Chicago
Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
Kavli Institute for Cosmological Physics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
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Affiliation as printed
Department of Physics, University of Cincinnati , Cincinnati, OH 45221, USA
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Fermi National Accelerator Laboratory · University of Chicago
Affiliation as printed
Department of Astronomy and Astrophysics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
Kavli Institute for Cosmological Physics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
Particle Physics Division, Fermi National Accelerator Laboratory , Batavia, IL 60510-0500, USA
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Argonne National Laboratory · University of Chicago
Affiliation as printed
Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, IL 60439, USA
Department of Physics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
Kavli Institute for Cosmological Physics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
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Excellence Cluster Origins · Ludwig-Maximilians-Universität München
Affiliation as printed
Excellence Cluster ORIGINS , Boltzmannstr. 2, D-85748 Garching, Germany
Faculty of Physics, Ludwig-Maximilians University , Scheinerstr. 1, D-81679 München, Germany
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University of Missouri–Kansas City
Affiliation as printed
Department of Physics and Astronomy, University of Missouri–Kansas City , 5110 Rockhill Road, Kansas City, MO 64110, USA
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Excellence Cluster Origins · Ludwig-Maximilians-Universität München
Affiliation as printed
Excellence Cluster ORIGINS , Boltzmannstr. 2, D-85748 Garching, Germany
Faculty of Physics, Ludwig-Maximilians University , Scheinerstr. 1, D-81679 München, Germany
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Affiliation as printed
Département de Physique , Université de Montréal, Montréal, QC, H3C 3J7, Canada
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Massachusetts Institute of Technology
Affiliation as printed
MIT Kavli Institute for Astrophysics and Space Research , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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University of Trieste · Istituto Nazionale di Fisica Nucleare · Trieste Astronomical Observatory · Istituto Nazionale di Fisica Nucleare, Sezione di Trieste · Institute for Fundamental Physics of the Universe
Affiliation as printed
Astronomy Unit, Department of Physics, University of Trieste , via Tiepolo 11, I-34131 Trieste, Italy
IFPU - Institute for Fundamental Physics of the Universe , Via Beirut 2, I-34014 Trieste, Italy
INAF - Osservatorio Astronomico di Trieste , Via G. B. Tiepolo 11, I-34143 Trieste, Italy
INFN - National Institute for Nuclear Physics , Via Valerio 2, I-34127 Trieste, Italy
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Center for Astrophysics Harvard & Smithsonian
Affiliation as printed
Center for Astrophysics | Harvard & Smithsonian 60 Garden Street | MS 42 | Cambridge , MA 02138, USA
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Affiliation as printed
Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
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