Mass calibration of distant SPT galaxy clusters through expanded weak-lensing follow-up observations with HST, VLT, & Gemini-South

Author:

Schrabback T1ORCID,Bocquet S23,Sommer M1ORCID,Zohren H1ORCID,van den Busch J L14,Hernández-Martín B1,Hoekstra H5ORCID,Raihan S F1ORCID,Schirmer M6ORCID,Applegate D17,Bayliss M8,Benson B A7910,Bleem L E71112,Dietrich J P23,Floyd B13ORCID,Hilbert S23,Hlavacek-Larrondo J14,McDonald M15,Saro A16171819ORCID,Stark A A20,Weissgerber N1

Affiliation:

1. Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany

2. Faculty of Physics, Ludwig-Maximilians University, Scheinerstr. 1, D-81679 München, Germany

3. Excellence Cluster ORIGINS, Boltzmannstr. 2, D-85748 Garching, Germany

4. Ruhr-University Bochum, Astronomical Institute, German Centre for Cosmological Lensing, Universitätsstr. 150, D-44801 Bochum, Germany

5. Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2300 CA Leiden, the Netherlands

6. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany

7. Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

8. Department of Physics, University of Cincinnati, Cincinnati, OH 45221, USA

9. Particle Physics Division, Fermi National Accelerator Laboratory, Batavia, IL 60510-0500, USA

10. Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

11. Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA

12. Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA

13. Department of Physics and Astronomy, University of Missouri–Kansas City, 5110 Rockhill Road, Kansas City, MO 64110, USA

14. Département de Physique, Université de Montréal, Montréal, QC, H3C 3J7, Canada

15. MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

16. Astronomy Unit, Department of Physics, University of Trieste, via Tiepolo 11, I-34131 Trieste, Italy

17. IFPU - Institute for Fundamental Physics of the Universe, Via Beirut 2, I-34014 Trieste, Italy

18. INAF - Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, I-34143 Trieste, Italy

19. INFN - National Institute for Nuclear Physics, Via Valerio 2, I-34127 Trieste, Italy

20. Center for Astrophysics | Harvard & Smithsonian 60 Garden Street | MS 42 | Cambridge, MA 02138, USA

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.

Funder

NASA

ESA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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