Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters
Grandis, S., et al. (DES Colaboration) We perform a cross validation of the cluster catalogue selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DES-Y1) data by matching it with the Sunyaev-Zel'dovich effect (SZE) selected c...
Published in: | Monthly Notices of the Royal Astronomical Society |
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2021
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Online Access: | http://hdl.handle.net/10261/256655 https://doi.org/10.1093/mnras/stab869 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002809 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100000001 |
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ftcsic:oai:digital.csic.es:10261/256655 2024-02-11T10:08:43+01:00 Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters Grandis, S. Castander, Francisco J. Fosalba, Pablo García-Bellido, Juan Gaztañaga, Enrique Serrano, S. Wu, H. DES Collaboration National Science Foundation (US) Ministerio de Economía y Competitividad (España) European Commission Generalitat de Catalunya Instituto Nacional de Ciência e Tecnologia (Brasil) 2021-03-25 http://hdl.handle.net/10261/256655 https://doi.org/10.1093/mnras/stab869 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002809 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100000001 unknown Oxford University Press #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO//AYA2015-71825-P/ES/COSMOLOGIA CON MAPAS DE GALAXIAS/ info:eu-repo/grantAgreement/MINECO//MDM-2015-0509/ES/CIEMAT - Física de Partículas/ info:eu-repo/grantAgreement/EC/FP7/240672 info:eu-repo/grantAgreement/EC/FP7/291329 info:eu-repo/grantAgreement/EC/FP7/306478 Publisher's version http://doi.org/10.1093/mnras/stab869 Sí doi:10.1093/mnras/stab869 issn: 1365-2966 Monthly Notices of the Royal Astronomical Society 504(1): 1253-1272 (2021) http://hdl.handle.net/10261/256655 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002809 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100000001 open Methods: statistical Galaxies: clusters: general Large-scale structure of Universe artículo http://purl.org/coar/resource_type/c_6501 2021 ftcsic https://doi.org/10.1093/mnras/stab86910.13039/50110000078010.13039/50110000280910.13039/50110000332910.13039/100000001 2024-01-16T11:16:45Z Grandis, S., et al. (DES Colaboration) We perform a cross validation of the cluster catalogue selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DES-Y1) data by matching it with the Sunyaev-Zel'dovich effect (SZE) selected cluster catalogue from the South Pole Telescope SPT-SZ survey. Of the 1005 redMaPPer selected clusters with measured richness $\hat{\lambda }\gt 40$ in the joint footprint, 207 are confirmed by SPT-SZ. Using the mass information from the SZE signal, we calibrate the richness-mass relation using a Bayesian cluster population model. We find a mass trend λ ∝ MB consistent with a linear relation (B ∼1), no significant redshift evolution and an intrinsic scatter in richness of σλ = 0.22 ± 0.06. By considering two error models, we explore the impact of projection effects on the richness-mass modelling, confirming that such effects are not detectable at the current level of systematic uncertainties. At low richness SPT-SZ confirms fewer redMaPPer clusters than expected. We interpret this richness dependent deficit in confirmed systems as due to the increased presence at low richness of low-mass objects not correctly accounted for by our richness-mass scatter model, which we call contaminants. At a richness $\hat{\lambda }=40$, this population makes up ${\gt}12{{\ \rm per\ cent}}$ (97.5 percentile) of the total population. Extrapolating this to a measured richness $\hat{\lambda }=20$ yields ${\gt}22{{\ \rm per\ cent}}$ (97.5 percentile). With these contamination fractions, the predicted redMaPPer number counts in different plausible cosmologies are compatible with the measured abundance. The presence of such a population is also a plausible explanation for the different mass trends (B ∼0.75) obtained from mass calibration using purely optically selected clusters. The mean mass from stacked weak lensing (WL) measurements suggests that these low-mass contaminants are galaxy groups with masses ∼3-5 × 1013 M⊙ which are beyond the ... Article in Journal/Newspaper South pole Digital.CSIC (Spanish National Research Council) Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) South Pole Monthly Notices of the Royal Astronomical Society 504 1 1253 1272 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Methods: statistical Galaxies: clusters: general Large-scale structure of Universe |
spellingShingle |
Methods: statistical Galaxies: clusters: general Large-scale structure of Universe Grandis, S. Castander, Francisco J. Fosalba, Pablo García-Bellido, Juan Gaztañaga, Enrique Serrano, S. Wu, H. DES Collaboration Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
topic_facet |
Methods: statistical Galaxies: clusters: general Large-scale structure of Universe |
description |
Grandis, S., et al. (DES Colaboration) We perform a cross validation of the cluster catalogue selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DES-Y1) data by matching it with the Sunyaev-Zel'dovich effect (SZE) selected cluster catalogue from the South Pole Telescope SPT-SZ survey. Of the 1005 redMaPPer selected clusters with measured richness $\hat{\lambda }\gt 40$ in the joint footprint, 207 are confirmed by SPT-SZ. Using the mass information from the SZE signal, we calibrate the richness-mass relation using a Bayesian cluster population model. We find a mass trend λ ∝ MB consistent with a linear relation (B ∼1), no significant redshift evolution and an intrinsic scatter in richness of σλ = 0.22 ± 0.06. By considering two error models, we explore the impact of projection effects on the richness-mass modelling, confirming that such effects are not detectable at the current level of systematic uncertainties. At low richness SPT-SZ confirms fewer redMaPPer clusters than expected. We interpret this richness dependent deficit in confirmed systems as due to the increased presence at low richness of low-mass objects not correctly accounted for by our richness-mass scatter model, which we call contaminants. At a richness $\hat{\lambda }=40$, this population makes up ${\gt}12{{\ \rm per\ cent}}$ (97.5 percentile) of the total population. Extrapolating this to a measured richness $\hat{\lambda }=20$ yields ${\gt}22{{\ \rm per\ cent}}$ (97.5 percentile). With these contamination fractions, the predicted redMaPPer number counts in different plausible cosmologies are compatible with the measured abundance. The presence of such a population is also a plausible explanation for the different mass trends (B ∼0.75) obtained from mass calibration using purely optically selected clusters. The mean mass from stacked weak lensing (WL) measurements suggests that these low-mass contaminants are galaxy groups with masses ∼3-5 × 1013 M⊙ which are beyond the ... |
author2 |
National Science Foundation (US) Ministerio de Economía y Competitividad (España) European Commission Generalitat de Catalunya Instituto Nacional de Ciência e Tecnologia (Brasil) |
format |
Article in Journal/Newspaper |
author |
Grandis, S. Castander, Francisco J. Fosalba, Pablo García-Bellido, Juan Gaztañaga, Enrique Serrano, S. Wu, H. DES Collaboration |
author_facet |
Grandis, S. Castander, Francisco J. Fosalba, Pablo García-Bellido, Juan Gaztañaga, Enrique Serrano, S. Wu, H. DES Collaboration |
author_sort |
Grandis, S. |
title |
Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
title_short |
Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
title_full |
Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
title_fullStr |
Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
title_full_unstemmed |
Exploring the contamination of the DES-Y1 cluster sample with SPT-SZ selected clusters |
title_sort |
exploring the contamination of the des-y1 cluster sample with spt-sz selected clusters |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/256655 https://doi.org/10.1093/mnras/stab869 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002809 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/100000001 |
long_lat |
ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
Lambda South Pole |
geographic_facet |
Lambda South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO//AYA2015-71825-P/ES/COSMOLOGIA CON MAPAS DE GALAXIAS/ info:eu-repo/grantAgreement/MINECO//MDM-2015-0509/ES/CIEMAT - Física de Partículas/ info:eu-repo/grantAgreement/EC/FP7/240672 info:eu-repo/grantAgreement/EC/FP7/291329 info:eu-repo/grantAgreement/EC/FP7/306478 Publisher's version http://doi.org/10.1093/mnras/stab869 Sí doi:10.1093/mnras/stab869 issn: 1365-2966 Monthly Notices of the Royal Astronomical Society 504(1): 1253-1272 (2021) http://hdl.handle.net/10261/256655 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002809 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100000001 |
op_rights |
open |
op_doi |
https://doi.org/10.1093/mnras/stab86910.13039/50110000078010.13039/50110000280910.13039/50110000332910.13039/100000001 |
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Monthly Notices of the Royal Astronomical Society |
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504 |
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1 |
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1253 |
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1272 |
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