The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9
We present the results of a Chandra X-ray survey of the 8 most massive galaxy clusters at z>1.2 in the South Pole Telescope 2500 deg^2 survey. We combine this sample with previously-published Chandra observations of 49 massive X-ray-selected clusters at 0<z<0.1 and 90 SZ-selected clusters a...
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Online Access: | http://www.osti.gov/servlets/purl/1352199 https://www.osti.gov/biblio/1352199 https://doi.org/10.3847/1538-4357/aa7740 |
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ftosti:oai:osti.gov:1352199 2023-07-30T04:06:55+02:00 The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 McDonald, M. Allen, S. W. Bayliss, M. Benson, B. A. Bleem, L. E. Brodwin, M. Bulbul, E. Carlstrom, J. E. Forman, W. R. Hlavacek-Larrondo, J. Garmire, G. P. Gaspari, M. Gladders, M. D. Mantz, A. B. Murray, S. S. 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1352199 https://www.osti.gov/biblio/1352199 https://doi.org/10.3847/1538-4357/aa7740 unknown http://www.osti.gov/servlets/purl/1352199 https://www.osti.gov/biblio/1352199 https://doi.org/10.3847/1538-4357/aa7740 doi:10.3847/1538-4357/aa7740 79 ASTRONOMY AND ASTROPHYSICS 2022 ftosti https://doi.org/10.3847/1538-4357/aa7740 2023-07-11T09:18:09Z We present the results of a Chandra X-ray survey of the 8 most massive galaxy clusters at z>1.2 in the South Pole Telescope 2500 deg^2 survey. We combine this sample with previously-published Chandra observations of 49 massive X-ray-selected clusters at 0<z<0.1 and 90 SZ-selected clusters at 0.25<z<1.2 to constrain the evolution of the intracluster medium (ICM) over the past ~10 Gyr. We find that the bulk of the ICM has evolved self similarly over the full redshift range probed here, with the ICM density at r>0.2R500 scaling like E(z)^2. In the centers of clusters (r<0.1R500), we find significant deviations from self similarity (n_e ~ E(z)^{0.1+/-0.5}), consistent with no redshift dependence. When we isolate clusters with over-dense cores (i.e., cool cores), we find that the average over-density profile has not evolved with redshift -- that is, cool cores have not changed in size, density, or total mass over the past ~9-10 Gyr. We show that the evolving "cuspiness" of clusters in the X-ray, reported by several previous studies, can be understood in the context of a cool core with fixed properties embedded in a self similarly-evolving cluster. We find no measurable evolution in the X-ray morphology of massive clusters, seemingly in tension with the rapidly-rising (with redshift) rate of major mergers predicted by cosmological simulations. We show that these two results can be brought into agreement if we assume that the relaxation time after a merger is proportional to the crossing time, since the latter is proportional to H(z)^(-1). Other/Unknown Material South pole SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) South Pole The Astrophysical Journal 843 1 28 |
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 McDonald, M. Allen, S. W. Bayliss, M. Benson, B. A. Bleem, L. E. Brodwin, M. Bulbul, E. Carlstrom, J. E. Forman, W. R. Hlavacek-Larrondo, J. Garmire, G. P. Gaspari, M. Gladders, M. D. Mantz, A. B. Murray, S. S. The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
topic_facet |
79 ASTRONOMY AND ASTROPHYSICS |
description |
We present the results of a Chandra X-ray survey of the 8 most massive galaxy clusters at z>1.2 in the South Pole Telescope 2500 deg^2 survey. We combine this sample with previously-published Chandra observations of 49 massive X-ray-selected clusters at 0<z<0.1 and 90 SZ-selected clusters at 0.25<z<1.2 to constrain the evolution of the intracluster medium (ICM) over the past ~10 Gyr. We find that the bulk of the ICM has evolved self similarly over the full redshift range probed here, with the ICM density at r>0.2R500 scaling like E(z)^2. In the centers of clusters (r<0.1R500), we find significant deviations from self similarity (n_e ~ E(z)^{0.1+/-0.5}), consistent with no redshift dependence. When we isolate clusters with over-dense cores (i.e., cool cores), we find that the average over-density profile has not evolved with redshift -- that is, cool cores have not changed in size, density, or total mass over the past ~9-10 Gyr. We show that the evolving "cuspiness" of clusters in the X-ray, reported by several previous studies, can be understood in the context of a cool core with fixed properties embedded in a self similarly-evolving cluster. We find no measurable evolution in the X-ray morphology of massive clusters, seemingly in tension with the rapidly-rising (with redshift) rate of major mergers predicted by cosmological simulations. We show that these two results can be brought into agreement if we assume that the relaxation time after a merger is proportional to the crossing time, since the latter is proportional to H(z)^(-1). |
author |
McDonald, M. Allen, S. W. Bayliss, M. Benson, B. A. Bleem, L. E. Brodwin, M. Bulbul, E. Carlstrom, J. E. Forman, W. R. Hlavacek-Larrondo, J. Garmire, G. P. Gaspari, M. Gladders, M. D. Mantz, A. B. Murray, S. S. |
author_facet |
McDonald, M. Allen, S. W. Bayliss, M. Benson, B. A. Bleem, L. E. Brodwin, M. Bulbul, E. Carlstrom, J. E. Forman, W. R. Hlavacek-Larrondo, J. Garmire, G. P. Gaspari, M. Gladders, M. D. Mantz, A. B. Murray, S. S. |
author_sort |
McDonald, M. |
title |
The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
title_short |
The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
title_full |
The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
title_fullStr |
The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
title_full_unstemmed |
The Remarkable Similarity of Massive Galaxy Clusters from z ~ 0 to z ~ 1.9 |
title_sort |
remarkable similarity of massive galaxy clusters from z ~ 0 to z ~ 1.9 |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1352199 https://www.osti.gov/biblio/1352199 https://doi.org/10.3847/1538-4357/aa7740 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://www.osti.gov/servlets/purl/1352199 https://www.osti.gov/biblio/1352199 https://doi.org/10.3847/1538-4357/aa7740 doi:10.3847/1538-4357/aa7740 |
op_doi |
https://doi.org/10.3847/1538-4357/aa7740 |
container_title |
The Astrophysical Journal |
container_volume |
843 |
container_issue |
1 |
container_start_page |
28 |
_version_ |
1772819880739864576 |