Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters
We present a detection of the enhancement in the number densities of background galaxies induced from lensing magnification and use it to test the Sunyaev-Zel'dovich effect (SZE-) inferred masses in a sample of 19 galaxy clusters with median redshift z ≃ 0.42 selected from the South Pole Telesc...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Online Access: | http://hdl.handle.net/11368/2962582 https://doi.org/10.1093/mnras/stw190 https://academic.oup.com/mnras/article/457/3/3050/2588975 |
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ftunitriestiris:oai:arts.units.it:11368/2962582 2023-05-15T18:23:06+02:00 Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. McDonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. Mcdonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. 2016 http://hdl.handle.net/11368/2962582 https://doi.org/10.1093/mnras/stw190 https://academic.oup.com/mnras/article/457/3/3050/2588975 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000373583900058 volume:457 issue:3 firstpage:3050 lastpage:3065 numberofpages:16 journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY http://hdl.handle.net/11368/2962582 doi:10.1093/mnras/stw190 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84976873470 https://academic.oup.com/mnras/article/457/3/3050/2588975 info:eu-repo/semantics/closedAccess Cluster Cosmology Gravitational lensing Individual Observations - large-scale structure of Universe Weak - galaxie Astronomy and Astrophysic Space and Planetary Science info:eu-repo/semantics/article 2016 ftunitriestiris https://doi.org/10.1093/mnras/stw190 2023-04-09T06:16:39Z We present a detection of the enhancement in the number densities of background galaxies induced from lensing magnification and use it to test the Sunyaev-Zel'dovich effect (SZE-) inferred masses in a sample of 19 galaxy clusters with median redshift z ≃ 0.42 selected from the South Pole Telescope SPT-SZ survey. These clusters are observed by the Megacam on the Magellan Clay Telescope though gri filters. Two background galaxy populations are selected for this study through their photometric colours; they have median redshifts zmedian ≃ 0.9 (low-z background) and zmedian ≃ 1.8 (high-z background). Stacking these populations, we detect the magnification bias effect at 3.3σ and 1.3σ for the low- and high-z backgrounds, respectively. We fit Navarro, Frenk and White models simultaneously to all observed magnification bias profiles to estimate the multiplicative factor η that describes the ratio of the weak lensing mass to the mass inferred from the SZE observable-mass relation. We further quantify systematic uncertainties in η resulting from the photometric noise and bias, the cluster galaxy contamination and the estimations of the background properties. The resulting η for the combined background populations with 1σ uncertainties is 0.83 ± 0.24(stat) ± 0.074(sys), indicating good consistency between the lensing and the SZE-inferred masses. We use our best-fitting η to predict the weak lensing shear profiles and compare these predictions with observations, showing agreement between the magnification and shear mass constraints. This work demonstrates the promise of using the magnification as a complementary method to estimate cluster masses in large surveys. Article in Journal/Newspaper South pole Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) Navarro ENVELOPE(-62.167,-62.167,-64.650,-64.650) South Pole Monthly Notices of the Royal Astronomical Society 457 3 3050 3065 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
Cluster Cosmology Gravitational lensing Individual Observations - large-scale structure of Universe Weak - galaxie Astronomy and Astrophysic Space and Planetary Science |
spellingShingle |
Cluster Cosmology Gravitational lensing Individual Observations - large-scale structure of Universe Weak - galaxie Astronomy and Astrophysic Space and Planetary Science Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. McDonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
topic_facet |
Cluster Cosmology Gravitational lensing Individual Observations - large-scale structure of Universe Weak - galaxie Astronomy and Astrophysic Space and Planetary Science |
description |
We present a detection of the enhancement in the number densities of background galaxies induced from lensing magnification and use it to test the Sunyaev-Zel'dovich effect (SZE-) inferred masses in a sample of 19 galaxy clusters with median redshift z ≃ 0.42 selected from the South Pole Telescope SPT-SZ survey. These clusters are observed by the Megacam on the Magellan Clay Telescope though gri filters. Two background galaxy populations are selected for this study through their photometric colours; they have median redshifts zmedian ≃ 0.9 (low-z background) and zmedian ≃ 1.8 (high-z background). Stacking these populations, we detect the magnification bias effect at 3.3σ and 1.3σ for the low- and high-z backgrounds, respectively. We fit Navarro, Frenk and White models simultaneously to all observed magnification bias profiles to estimate the multiplicative factor η that describes the ratio of the weak lensing mass to the mass inferred from the SZE observable-mass relation. We further quantify systematic uncertainties in η resulting from the photometric noise and bias, the cluster galaxy contamination and the estimations of the background properties. The resulting η for the combined background populations with 1σ uncertainties is 0.83 ± 0.24(stat) ± 0.074(sys), indicating good consistency between the lensing and the SZE-inferred masses. We use our best-fitting η to predict the weak lensing shear profiles and compare these predictions with observations, showing agreement between the magnification and shear mass constraints. This work demonstrates the promise of using the magnification as a complementary method to estimate cluster masses in large surveys. |
author2 |
Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. Mcdonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. |
format |
Article in Journal/Newspaper |
author |
Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. McDonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. |
author_facet |
Chiu, I. Dietrich, J. P. Mohr, J. Applegate, D. E. Benson, B. A. Bleem, L. E. Bayliss, M. B. Bocquet, S. Carlstrom, J. E. Capasso, R. Desai, S. Gangkofner, C. Gonzalez, A. H. Gupta, N. Hennig, C. Hoekstra, H. von der Linden, A. Liu, J. McDonald, M. Reichardt, C. L. Saro, A. Schrabback, T. Strazzullo, V. Stubbs, C. W. Zenteno, A. |
author_sort |
Chiu, I. |
title |
Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
title_short |
Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
title_full |
Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
title_fullStr |
Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
title_full_unstemmed |
Detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
title_sort |
detection of enhancement in number densities of background galaxies due to magnification by massive galaxy clusters |
publishDate |
2016 |
url |
http://hdl.handle.net/11368/2962582 https://doi.org/10.1093/mnras/stw190 https://academic.oup.com/mnras/article/457/3/3050/2588975 |
long_lat |
ENVELOPE(-62.167,-62.167,-64.650,-64.650) |
geographic |
Navarro South Pole |
geographic_facet |
Navarro South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000373583900058 volume:457 issue:3 firstpage:3050 lastpage:3065 numberofpages:16 journal:MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY http://hdl.handle.net/11368/2962582 doi:10.1093/mnras/stw190 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84976873470 https://academic.oup.com/mnras/article/457/3/3050/2588975 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/mnras/stw190 |
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457 |
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