Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey
We present spectroscopic confirmation of five galaxy clusters at 1.25 < z < 1.5, discovered in the 2500 deg2 South Pole Telescope Sunyaev-Zel’dovich (SZ) survey. These clusters, taken from a mass-limited sample with a nearly redshift-independent selection function, have multiwavelength follow-...
Published in: | The Astrophysical Journal |
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Online Access: | http://hdl.handle.net/11368/2962500 https://doi.org/10.3847/1538-4357/aaeed0 https://iopscience.iop.org/article/10.3847/1538-4357/aaeed0/meta |
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ftunitriestiris:oai:arts.units.it:11368/2962500 2023-05-15T18:22:14+02:00 Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. McDonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo J. Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. Mcdonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo, J., Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. 2019 http://hdl.handle.net/11368/2962500 https://doi.org/10.3847/1538-4357/aaeed0 https://iopscience.iop.org/article/10.3847/1538-4357/aaeed0/meta eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000454541100007 volume:870 issue:1 firstpage:- lastpage:- numberofpages:16 journal:THE ASTROPHYSICAL JOURNAL info:eu-repo/grantAgreement/EC/H2020/71676 http://hdl.handle.net/11368/2962500 doi:10.3847/1538-4357/aaeed0 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85059864208 https://iopscience.iop.org/article/10.3847/1538-4357/aaeed0/meta info:eu-repo/semantics/openAccess galaxies: clusters: general galaxies: distances and redshift galaxies: evolution galaxies: kinematics and dynamic galaxies: high-redshift Astrophysics - Astrophysics of Galaxies info:eu-repo/semantics/article 2019 ftunitriestiris https://doi.org/10.3847/1538-4357/aaeed0 2023-04-09T06:18:11Z We present spectroscopic confirmation of five galaxy clusters at 1.25 < z < 1.5, discovered in the 2500 deg2 South Pole Telescope Sunyaev-Zel’dovich (SZ) survey. These clusters, taken from a mass-limited sample with a nearly redshift-independent selection function, have multiwavelength follow-up imaging data from the X-ray to near-IR and currently form the most homogeneous massive high-redshift cluster sample known. We identify 44 member galaxies, along with 25 field galaxies, among the five clusters, and describe the full set of observations and data products from Magellan/LDSS3 multiobject spectroscopy of these cluster fields. We briefly describe the analysis pipeline and present ensemble analyses of cluster member galaxies that demonstrate the reliability of the measured redshifts. We report z = 1.259, 1.288, 1.316, 1.401, and 1.474 for the five clusters from a combination of absorption-line (Ca II H&K doublet—λλ3968, 3934) and emission-line ([O II] λλ3727, 3729) spectral features. Moreover, the calculated velocity dispersions yield dynamical cluster masses in good agreement with the SZ masses for these clusters. We discuss the velocity and spatial distributions of passive and [O II]-emitting galaxies in these clusters, showing that they are consistent with velocity segregation and biases observed in lower redshift South Pole Telescope clusters. We identify modest [O II] emission and pronounced CN and Hδ absorption in a stacked spectrum of 28 passive galaxies with Ca II H&K-derived redshifts. This work increases the number of spectroscopically confirmed SZ-selected galaxy clusters at z > 1.25 from three to eight, further demonstrating the efficacy of SZ selection for the highest redshift massive clusters and enabling detailed study of these systems. Article in Journal/Newspaper South pole Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) South Pole The Astrophysical Journal 870 1 7 |
institution |
Open Polar |
collection |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
galaxies: clusters: general galaxies: distances and redshift galaxies: evolution galaxies: kinematics and dynamic galaxies: high-redshift Astrophysics - Astrophysics of Galaxies |
spellingShingle |
galaxies: clusters: general galaxies: distances and redshift galaxies: evolution galaxies: kinematics and dynamic galaxies: high-redshift Astrophysics - Astrophysics of Galaxies Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. McDonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo J. Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
topic_facet |
galaxies: clusters: general galaxies: distances and redshift galaxies: evolution galaxies: kinematics and dynamic galaxies: high-redshift Astrophysics - Astrophysics of Galaxies |
description |
We present spectroscopic confirmation of five galaxy clusters at 1.25 < z < 1.5, discovered in the 2500 deg2 South Pole Telescope Sunyaev-Zel’dovich (SZ) survey. These clusters, taken from a mass-limited sample with a nearly redshift-independent selection function, have multiwavelength follow-up imaging data from the X-ray to near-IR and currently form the most homogeneous massive high-redshift cluster sample known. We identify 44 member galaxies, along with 25 field galaxies, among the five clusters, and describe the full set of observations and data products from Magellan/LDSS3 multiobject spectroscopy of these cluster fields. We briefly describe the analysis pipeline and present ensemble analyses of cluster member galaxies that demonstrate the reliability of the measured redshifts. We report z = 1.259, 1.288, 1.316, 1.401, and 1.474 for the five clusters from a combination of absorption-line (Ca II H&K doublet—λλ3968, 3934) and emission-line ([O II] λλ3727, 3729) spectral features. Moreover, the calculated velocity dispersions yield dynamical cluster masses in good agreement with the SZ masses for these clusters. We discuss the velocity and spatial distributions of passive and [O II]-emitting galaxies in these clusters, showing that they are consistent with velocity segregation and biases observed in lower redshift South Pole Telescope clusters. We identify modest [O II] emission and pronounced CN and Hδ absorption in a stacked spectrum of 28 passive galaxies with Ca II H&K-derived redshifts. This work increases the number of spectroscopically confirmed SZ-selected galaxy clusters at z > 1.25 from three to eight, further demonstrating the efficacy of SZ selection for the highest redshift massive clusters and enabling detailed study of these systems. |
author2 |
Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. Mcdonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo, J., Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. |
format |
Article in Journal/Newspaper |
author |
Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. McDonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo J. Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. |
author_facet |
Khullar, G. Bleem, L. E. Bayliss, M. B. Gladders, M. D. Benson, B. A. McDonald, M. Allen, S. W. Applegate, D. E. Ashby, M. L. N. Bocquet, S. Brodwin, M. Bulbul, E. Canning, R. E. A. Capasso, R. Chiu, I. Crawford, T. M. de Haan, T. Dietrich, J. P. Gonzalez, A. H. Hlavacek-Larrondo J. Hoekstra Holzapfel, W. L. von der Linden, A. Mantz, A. B. Patil, S. Reichardt, C. L. Saro, A. Sharon, K. Stalder, B. Stanford, S. A. Stark, A. A. Strazzullo, V. |
author_sort |
Khullar, G. |
title |
Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
title_short |
Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
title_full |
Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
title_fullStr |
Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
title_full_unstemmed |
Spectroscopic Confirmation of Five Galaxy Clusters at z > 1.25 in the 2500 deg2 SPT-SZ Survey |
title_sort |
spectroscopic confirmation of five galaxy clusters at z > 1.25 in the 2500 deg2 spt-sz survey |
publishDate |
2019 |
url |
http://hdl.handle.net/11368/2962500 https://doi.org/10.3847/1538-4357/aaeed0 https://iopscience.iop.org/article/10.3847/1538-4357/aaeed0/meta |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000454541100007 volume:870 issue:1 firstpage:- lastpage:- numberofpages:16 journal:THE ASTROPHYSICAL JOURNAL info:eu-repo/grantAgreement/EC/H2020/71676 http://hdl.handle.net/11368/2962500 doi:10.3847/1538-4357/aaeed0 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85059864208 https://iopscience.iop.org/article/10.3847/1538-4357/aaeed0/meta |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3847/1538-4357/aaeed0 |
container_title |
The Astrophysical Journal |
container_volume |
870 |
container_issue |
1 |
container_start_page |
7 |
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1766201612210012160 |