Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys
Sunyaev-Zeldovich (SZ) surveys find massive clusters of galaxies by measuring the inverse Compton scattering of cosmic microwave background off of intra-cluster gas. The cluster selection function from such surveys is expected to be nearly independent of redshift and cluster astrophysics. In this wo...
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ftdatacite:10.48550/arxiv.1501.04650 2023-05-15T18:23:06+02:00 Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys Lin, Henry W. McDonald, Michael Benson, Bradford Miller, Eric 2015 https://dx.doi.org/10.48550/arxiv.1501.04650 https://arxiv.org/abs/1501.04650 unknown arXiv https://dx.doi.org/10.1088/0004-637x/802/1/34 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2015 ftdatacite https://doi.org/10.48550/arxiv.1501.04650 https://doi.org/10.1088/0004-637x/802/1/34 2022-04-01T12:29:51Z Sunyaev-Zeldovich (SZ) surveys find massive clusters of galaxies by measuring the inverse Compton scattering of cosmic microwave background off of intra-cluster gas. The cluster selection function from such surveys is expected to be nearly independent of redshift and cluster astrophysics. In this work, we estimate the effect on the observed SZ signal of centrally-peaked gas density profiles (cool cores) and radio emission from the brightest cluster galaxy (BCG) by creating mock observations of a sample of clusters that span the observed range of classical cooling rates and radio luminosities. For each cluster, we make simulated SZ observations by the South Pole Telescope and characterize the cluster selection function, but note that our results are broadly applicable to other SZ surveys. We find that the inclusion of a cool core can cause a change in the measured SPT significance of a cluster between 0.01% - 10% at z > 0.3, increasing with cuspiness of the cool core and angular size on the sky of the cluster (i.e., decreasing redshift, increasing mass). We provide quantitative estimates of the bias in the SZ signal as a function of a gas density cuspiness parameter, redshift, mass, and the 1.4 GHz radio luminosity of the central AGN. Based on this work, we estimate that, for the Phoenix cluster (one of the strongest cool cores known), the presence of a cool core is biasing the SZ significance high by ~ 6%. The ubiquity of radio galaxies at the centers of cool core clusters will offset the cool core bias to varying degrees. : 8 pages, 4 figures, accepted to ApJ Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Lin, Henry W. McDonald, Michael Benson, Bradford Miller, Eric Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
Sunyaev-Zeldovich (SZ) surveys find massive clusters of galaxies by measuring the inverse Compton scattering of cosmic microwave background off of intra-cluster gas. The cluster selection function from such surveys is expected to be nearly independent of redshift and cluster astrophysics. In this work, we estimate the effect on the observed SZ signal of centrally-peaked gas density profiles (cool cores) and radio emission from the brightest cluster galaxy (BCG) by creating mock observations of a sample of clusters that span the observed range of classical cooling rates and radio luminosities. For each cluster, we make simulated SZ observations by the South Pole Telescope and characterize the cluster selection function, but note that our results are broadly applicable to other SZ surveys. We find that the inclusion of a cool core can cause a change in the measured SPT significance of a cluster between 0.01% - 10% at z > 0.3, increasing with cuspiness of the cool core and angular size on the sky of the cluster (i.e., decreasing redshift, increasing mass). We provide quantitative estimates of the bias in the SZ signal as a function of a gas density cuspiness parameter, redshift, mass, and the 1.4 GHz radio luminosity of the central AGN. Based on this work, we estimate that, for the Phoenix cluster (one of the strongest cool cores known), the presence of a cool core is biasing the SZ significance high by ~ 6%. The ubiquity of radio galaxies at the centers of cool core clusters will offset the cool core bias to varying degrees. : 8 pages, 4 figures, accepted to ApJ |
format |
Text |
author |
Lin, Henry W. McDonald, Michael Benson, Bradford Miller, Eric |
author_facet |
Lin, Henry W. McDonald, Michael Benson, Bradford Miller, Eric |
author_sort |
Lin, Henry W. |
title |
Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
title_short |
Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
title_full |
Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
title_fullStr |
Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
title_full_unstemmed |
Cool Core Bias in Sunyaev-Zel'dovich Galaxy Cluster Surveys |
title_sort |
cool core bias in sunyaev-zel'dovich galaxy cluster surveys |
publisher |
arXiv |
publishDate |
2015 |
url |
https://dx.doi.org/10.48550/arxiv.1501.04650 https://arxiv.org/abs/1501.04650 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1088/0004-637x/802/1/34 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1501.04650 https://doi.org/10.1088/0004-637x/802/1/34 |
_version_ |
1766202532065968128 |