Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data
We present weak-lensing (WL) mass constraints for a sample of massive galaxy clusters detected by the South Pole Telescope (SPT) via the Sunyaev–Zel’dovich effect (SZE). We use griz imaging data obtained from the Science Verification (SV) phase of the Dark Energy Survey (DES) to fit the WL shear sig...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/343601 2023-11-12T04:26:23+01:00 Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data DES and SPT Collaborations Stern, C. Kacprzak, Tomasz 2019-05 application/application/pdf https://hdl.handle.net/20.500.11850/343601 https://doi.org/10.3929/ethz-b-000343601 en eng Oxford University Press info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stz234 info:eu-repo/semantics/altIdentifier/wos/000466786400005 http://hdl.handle.net/20.500.11850/343601 doi:10.3929/ethz-b-000343601 info:eu-repo/semantics/openAccess http://rightsstatements.org/page/InC-NC/1.0/ In Copyright - Non-Commercial Use Permitted Monthly Notices of the Royal Astronomical Society, 485 (1) gravitational lensing: weak galaxies: clusters: general cosmology: observations info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftethz https://doi.org/20.500.11850/34360110.3929/ethz-b-00034360110.1093/mnras/stz234 2023-10-22T23:51:11Z We present weak-lensing (WL) mass constraints for a sample of massive galaxy clusters detected by the South Pole Telescope (SPT) via the Sunyaev–Zel’dovich effect (SZE). We use griz imaging data obtained from the Science Verification (SV) phase of the Dark Energy Survey (DES) to fit the WL shear signal of 33 clusters in the redshift range 0.25 ≤ z ≤ 0.8 with NFW profiles and to constrain a four-parameter SPT mass–observable relation. To account for biases in WL masses, we introduce a WL mass to true mass scaling relation described by a mean bias and an intrinsic, lognormal scatter. We allow for correlated scatter within the WL and SZE mass–observable relations and use simulations to constrain priors on nuisance parameters related to bias and scatter from WL. We constrain the normalization of the ζ−M₅₀₀ relation, A_SZ=12.0₋₆.₇⁺².⁶ when using a prior on the mass slope BSZ from the latest SPT cluster cosmology analysis. Without this prior, we recover ASZ=10.8₋₅.₂⁺².³ and BSZ=1.30₋₀.₄₄⁺⁰.²². Results in both cases imply lower cluster masses than measured in previous work with and without WL, although the uncertainties are large. The WL derived value of B_SZ is ≈20 per cent lower than the value preferred by the most recent SPT cluster cosmology analysis. The method demonstrated in this work is designed to constrain cluster masses and cosmological parameters simultaneously and will form the basis for subsequent studies that employ the full SPT cluster sample together with the DES data. ISSN:0035-8711 ISSN:1365-2966 Article in Journal/Newspaper South pole ETH Zürich Research Collection South Pole |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
gravitational lensing: weak galaxies: clusters: general cosmology: observations |
spellingShingle |
gravitational lensing: weak galaxies: clusters: general cosmology: observations DES and SPT Collaborations Stern, C. Kacprzak, Tomasz Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
topic_facet |
gravitational lensing: weak galaxies: clusters: general cosmology: observations |
description |
We present weak-lensing (WL) mass constraints for a sample of massive galaxy clusters detected by the South Pole Telescope (SPT) via the Sunyaev–Zel’dovich effect (SZE). We use griz imaging data obtained from the Science Verification (SV) phase of the Dark Energy Survey (DES) to fit the WL shear signal of 33 clusters in the redshift range 0.25 ≤ z ≤ 0.8 with NFW profiles and to constrain a four-parameter SPT mass–observable relation. To account for biases in WL masses, we introduce a WL mass to true mass scaling relation described by a mean bias and an intrinsic, lognormal scatter. We allow for correlated scatter within the WL and SZE mass–observable relations and use simulations to constrain priors on nuisance parameters related to bias and scatter from WL. We constrain the normalization of the ζ−M₅₀₀ relation, A_SZ=12.0₋₆.₇⁺².⁶ when using a prior on the mass slope BSZ from the latest SPT cluster cosmology analysis. Without this prior, we recover ASZ=10.8₋₅.₂⁺².³ and BSZ=1.30₋₀.₄₄⁺⁰.²². Results in both cases imply lower cluster masses than measured in previous work with and without WL, although the uncertainties are large. The WL derived value of B_SZ is ≈20 per cent lower than the value preferred by the most recent SPT cluster cosmology analysis. The method demonstrated in this work is designed to constrain cluster masses and cosmological parameters simultaneously and will form the basis for subsequent studies that employ the full SPT cluster sample together with the DES data. ISSN:0035-8711 ISSN:1365-2966 |
format |
Article in Journal/Newspaper |
author |
DES and SPT Collaborations Stern, C. Kacprzak, Tomasz |
author_facet |
DES and SPT Collaborations Stern, C. Kacprzak, Tomasz |
author_sort |
DES and SPT Collaborations |
title |
Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
title_short |
Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
title_full |
Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
title_fullStr |
Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
title_full_unstemmed |
Weak-lensing analysis of SPT-selected galaxy clusters using Dark Energy Survey Science Verification data |
title_sort |
weak-lensing analysis of spt-selected galaxy clusters using dark energy survey science verification data |
publisher |
Oxford University Press |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11850/343601 https://doi.org/10.3929/ethz-b-000343601 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Monthly Notices of the Royal Astronomical Society, 485 (1) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stz234 info:eu-repo/semantics/altIdentifier/wos/000466786400005 http://hdl.handle.net/20.500.11850/343601 doi:10.3929/ethz-b-000343601 |
op_rights |
info:eu-repo/semantics/openAccess http://rightsstatements.org/page/InC-NC/1.0/ In Copyright - Non-Commercial Use Permitted |
op_doi |
https://doi.org/20.500.11850/34360110.3929/ethz-b-00034360110.1093/mnras/stz234 |
_version_ |
1782340383803441152 |