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 eight 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 Sunyaev-Zel’d...
Published in: | The Astrophysical Journal |
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Online Access: | https://hdl.handle.net/11380/1338377 https://hdl.handle.net/20.500.12386/29225 https://doi.org/10.3847/1538-4357/aa7740 |
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ftunivmodena:oai:iris.unimore.it:11380/1338377 2024-06-23T07:56:51+00:00 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, MASSIMO Gladders, M. D. Mantz, A. B. Murray, S. S. 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, Massimo Gladders, M. D. Mantz, A. B. Murray, S. S. 2017 https://hdl.handle.net/11380/1338377 https://hdl.handle.net/20.500.12386/29225 https://doi.org/10.3847/1538-4357/aa7740 eng eng volume:843 issue:1 firstpage:28 lastpage:N/A journal:THE ASTROPHYSICAL JOURNAL https://hdl.handle.net/11380/1338377 doi:10.3847/1538-4357/aa7740 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85021762514 http://hdl.handle.net/20.500.12386/29225 info:eu-repo/semantics/closedAccess galaxies: clusters: general galaxies: clusters: intracluster medium galaxies: high-redshift X-rays: galaxies: cluster info:eu-repo/semantics/article 2017 ftunivmodena https://doi.org/20.500.12386/2922510.3847/1538-4357/aa7740 2024-06-10T23:48:57Z We present the results of a Chandra X-ray survey of the eight 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 Sunyaev-Zel’dovich-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>0.2 R_500 scaling like E(z)^2. In the centers of clusters (r≲ 0.01 R_500), we find significant deviations from self-similarity (n_e \propto E(z)^0.2+/-0.5), consistent with no redshift dependence. When we isolate clusters with overdense cores (I.e., cool cores), we find that the average overdensity 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. Article in Journal/Newspaper South pole Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) South Pole The Astrophysical Journal 843 1 28 |
institution |
Open Polar |
collection |
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
op_collection_id |
ftunivmodena |
language |
English |
topic |
galaxies: clusters: general galaxies: clusters: intracluster medium galaxies: high-redshift X-rays: galaxies: cluster |
spellingShingle |
galaxies: clusters: general galaxies: clusters: intracluster medium galaxies: high-redshift X-rays: galaxies: cluster 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, MASSIMO 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 |
galaxies: clusters: general galaxies: clusters: intracluster medium galaxies: high-redshift X-rays: galaxies: cluster |
description |
We present the results of a Chandra X-ray survey of the eight 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 Sunyaev-Zel’dovich-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>0.2 R_500 scaling like E(z)^2. In the centers of clusters (r≲ 0.01 R_500), we find significant deviations from self-similarity (n_e \propto E(z)^0.2+/-0.5), consistent with no redshift dependence. When we isolate clusters with overdense cores (I.e., cool cores), we find that the average overdensity 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. |
author2 |
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, Massimo Gladders, M. D. Mantz, A. B. Murray, S. S. |
format |
Article in Journal/Newspaper |
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, MASSIMO 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, MASSIMO 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 |
2017 |
url |
https://hdl.handle.net/11380/1338377 https://hdl.handle.net/20.500.12386/29225 https://doi.org/10.3847/1538-4357/aa7740 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
volume:843 issue:1 firstpage:28 lastpage:N/A journal:THE ASTROPHYSICAL JOURNAL https://hdl.handle.net/11380/1338377 doi:10.3847/1538-4357/aa7740 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85021762514 http://hdl.handle.net/20.500.12386/29225 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/20.500.12386/2922510.3847/1538-4357/aa7740 |
container_title |
The Astrophysical Journal |
container_volume |
843 |
container_issue |
1 |
container_start_page |
28 |
_version_ |
1802650211278913536 |