Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters
We present a quantitative study of the X-ray morphology of galaxy clusters, as a function of their detection method and redshift. We analyze two separate samples of galaxy clusters: a sample of 36 clusters at $0.35\lt z\lt 0.9$ selected in the X-ray with the ROSAT PSPC 400 deg(2) survey, and a sampl...
Published in: | The Astrophysical Journal |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Language: | unknown |
Published: |
2022
|
Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1373304 https://www.osti.gov/biblio/1373304 https://doi.org/10.3847/1538-4357/aa6db4 |
id |
ftosti:oai:osti.gov:1373304 |
---|---|
record_format |
openpolar |
spelling |
ftosti:oai:osti.gov:1373304 2023-07-30T04:06:55+02:00 Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters Nurgaliev, D. McDonald, M. Benson, B. A. Bleem, L. Bocquet, S. Forman, W. R. Garmire, G. P. Gupta, N. Hlavacek-Larrondo, J. Mohr, J. J. Nagai, D. Rapetti, D. Stark, A. A. Stubbs, C. W. Vikhlinin, A. 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1373304 https://www.osti.gov/biblio/1373304 https://doi.org/10.3847/1538-4357/aa6db4 unknown http://www.osti.gov/servlets/purl/1373304 https://www.osti.gov/biblio/1373304 https://doi.org/10.3847/1538-4357/aa6db4 doi:10.3847/1538-4357/aa6db4 79 ASTRONOMY AND ASTROPHYSICS 2022 ftosti https://doi.org/10.3847/1538-4357/aa6db4 2023-07-11T09:20:05Z We present a quantitative study of the X-ray morphology of galaxy clusters, as a function of their detection method and redshift. We analyze two separate samples of galaxy clusters: a sample of 36 clusters at $0.35\lt z\lt 0.9$ selected in the X-ray with the ROSAT PSPC 400 deg(2) survey, and a sample of 90 clusters at $0.25\lt z\lt 1.2$ selected via the Sunyaev–Zel’dovich (SZ) effect with the South Pole Telescope. Clusters from both samples have similar-quality Chandra observations, which allow us to quantify their X-ray morphologies via two distinct methods: centroid shifts (w) and photon asymmetry (${A}_{\mathrm{phot}}$). The latter technique provides nearly unbiased morphology estimates for clusters spanning a broad range of redshift and data quality. We further compare the X-ray morphologies of X-ray- and SZ-selected clusters with those of simulated clusters. We do not find a statistically significant difference in the measured X-ray morphology of X-ray and SZ-selected clusters over the redshift range probed by these samples, suggesting that the two are probing similar populations of clusters. We find that the X-ray morphologies of simulated clusters are statistically indistinguishable from those of X-ray- or SZ-selected clusters, implying that the most important physics for dictating the large-scale gas morphology (outside of the core) is well-approximated in these simulations. Finally, we find no statistically significant redshift evolution in the X-ray morphology (both for observed and simulated clusters), over the range of $z\sim 0.3$ to $z\sim 1$, seemingly in contradiction with the redshift-dependent halo merger rate predicted by simulations. Other/Unknown Material South pole SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) South Pole The Astrophysical Journal 841 1 5 |
institution |
Open Polar |
collection |
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
79 ASTRONOMY AND ASTROPHYSICS |
spellingShingle |
79 ASTRONOMY AND ASTROPHYSICS Nurgaliev, D. McDonald, M. Benson, B. A. Bleem, L. Bocquet, S. Forman, W. R. Garmire, G. P. Gupta, N. Hlavacek-Larrondo, J. Mohr, J. J. Nagai, D. Rapetti, D. Stark, A. A. Stubbs, C. W. Vikhlinin, A. Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
topic_facet |
79 ASTRONOMY AND ASTROPHYSICS |
description |
We present a quantitative study of the X-ray morphology of galaxy clusters, as a function of their detection method and redshift. We analyze two separate samples of galaxy clusters: a sample of 36 clusters at $0.35\lt z\lt 0.9$ selected in the X-ray with the ROSAT PSPC 400 deg(2) survey, and a sample of 90 clusters at $0.25\lt z\lt 1.2$ selected via the Sunyaev–Zel’dovich (SZ) effect with the South Pole Telescope. Clusters from both samples have similar-quality Chandra observations, which allow us to quantify their X-ray morphologies via two distinct methods: centroid shifts (w) and photon asymmetry (${A}_{\mathrm{phot}}$). The latter technique provides nearly unbiased morphology estimates for clusters spanning a broad range of redshift and data quality. We further compare the X-ray morphologies of X-ray- and SZ-selected clusters with those of simulated clusters. We do not find a statistically significant difference in the measured X-ray morphology of X-ray and SZ-selected clusters over the redshift range probed by these samples, suggesting that the two are probing similar populations of clusters. We find that the X-ray morphologies of simulated clusters are statistically indistinguishable from those of X-ray- or SZ-selected clusters, implying that the most important physics for dictating the large-scale gas morphology (outside of the core) is well-approximated in these simulations. Finally, we find no statistically significant redshift evolution in the X-ray morphology (both for observed and simulated clusters), over the range of $z\sim 0.3$ to $z\sim 1$, seemingly in contradiction with the redshift-dependent halo merger rate predicted by simulations. |
author |
Nurgaliev, D. McDonald, M. Benson, B. A. Bleem, L. Bocquet, S. Forman, W. R. Garmire, G. P. Gupta, N. Hlavacek-Larrondo, J. Mohr, J. J. Nagai, D. Rapetti, D. Stark, A. A. Stubbs, C. W. Vikhlinin, A. |
author_facet |
Nurgaliev, D. McDonald, M. Benson, B. A. Bleem, L. Bocquet, S. Forman, W. R. Garmire, G. P. Gupta, N. Hlavacek-Larrondo, J. Mohr, J. J. Nagai, D. Rapetti, D. Stark, A. A. Stubbs, C. W. Vikhlinin, A. |
author_sort |
Nurgaliev, D. |
title |
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
title_short |
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
title_full |
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
title_fullStr |
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
title_full_unstemmed |
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters |
title_sort |
testing for x-ray–sz differences and redshift evolution in the x-ray morphology of galaxy clusters |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1373304 https://www.osti.gov/biblio/1373304 https://doi.org/10.3847/1538-4357/aa6db4 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://www.osti.gov/servlets/purl/1373304 https://www.osti.gov/biblio/1373304 https://doi.org/10.3847/1538-4357/aa6db4 doi:10.3847/1538-4357/aa6db4 |
op_doi |
https://doi.org/10.3847/1538-4357/aa6db4 |
container_title |
The Astrophysical Journal |
container_volume |
841 |
container_issue |
1 |
container_start_page |
5 |
_version_ |
1772819883418976256 |