The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters
We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral-field spectrograph Galaxy Survey. The clusters cover a mass range of 14.2log(M200/M☉) <15.2 and we measure spatially resolved stellar kinematics for 315 member galaxi...
Published in: | The Astrophysical Journal |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2018
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Online Access: | http://hdl.handle.net/10023/12535 https://doi.org/10.3847/1538-4357/aa7a11 http://arxiv.org/abs/1704.01169v2 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/12535 |
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Open Polar |
collection |
University of St Andrews: Digital Research Repository |
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ftstandrewserep |
language |
English |
topic |
Galaxies: clusters: general Galaxies: elliptical and lenticular cD Galaxies: evolution Galaxies: groups: general Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC |
spellingShingle |
Galaxies: clusters: general Galaxies: elliptical and lenticular cD Galaxies: evolution Galaxies: groups: general Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC Brough, Sarah Sande, Jesse van de Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bland-Hawthorn, Joss Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory López-Sánchez, Á. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
topic_facet |
Galaxies: clusters: general Galaxies: elliptical and lenticular cD Galaxies: evolution Galaxies: groups: general Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC |
description |
We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral-field spectrograph Galaxy Survey. The clusters cover a mass range of 14.2log(M200/M☉) <15.2 and we measure spatially resolved stellar kinematics for 315 member galaxies with stellar masses 10.0 < log(M*/M☉) ≤ 11.7 within 1 R 200 of the cluster centers. We calculate the spin parameter, λ R , and use this to classify the kinematic morphology of the galaxies as fast or slow rotators (SRs). The total fraction of SRs in the ETG population is F SR = 0.14 ± 0.02 and does not depend on host cluster mass. Across the eight clusters, the fraction of SRs increases with increasing local overdensity. We also find that the slow-rotator fraction increases at small clustercentric radii (R cl < 0.3 R 200), and note that there is also an increase in the slow-rotator fraction at R cl ~ 0.6 R 200. The SRs at these larger radii reside in the cluster substructure. We find that the strongest increase in the slow-rotator fraction occurs with increasing stellar mass. After accounting for the strong correlation with stellar mass, we find no significant relationship between spin parameter and local overdensity in the cluster environment. We conclude that the primary driver for the kinematic morphology–density relationship in galaxy clusters is the changing distribution of galaxy stellar mass with the local environment. The presence of SRs in the substructure suggests that the cluster kinematic morphology–density relationship is a result of mass segregation of slow-rotating galaxies forming in groups that later merge with clusters and sink to the cluster center via dynamical friction. Publisher PDF Peer reviewed |
author2 |
University of St Andrews. School of Physics and Astronomy |
format |
Article in Journal/Newspaper |
author |
Brough, Sarah Sande, Jesse van de Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bland-Hawthorn, Joss Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory López-Sánchez, Á. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. |
author_facet |
Brough, Sarah Sande, Jesse van de Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bland-Hawthorn, Joss Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory López-Sánchez, Á. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. |
author_sort |
Brough, Sarah |
title |
The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
title_short |
The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
title_full |
The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
title_fullStr |
The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
title_full_unstemmed |
The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters |
title_sort |
sami galaxy survey : mass as the driver of the kinematic morphology - density relation in clusters |
publishDate |
2018 |
url |
http://hdl.handle.net/10023/12535 https://doi.org/10.3847/1538-4357/aa7a11 http://arxiv.org/abs/1704.01169v2 |
genre |
sami |
genre_facet |
sami |
op_relation |
Astrophysical Journal Brough , S , Sande , J V D , Owers , M S , d'Eugenio , F , Sharp , R , Cortese , L , Scott , N , Croom , S M , Bassett , R , Bekki , K , Bland-Hawthorn , J , Bryant , J J , Davies , R , Drinkwater , M J , Driver , S P , Foster , C , Goldstein , G , López-Sánchez , Á R , Medling , A M , Sweet , S M , Taranu , D S , Tonini , C , Yi , S K , Goodwin , M , Lawrence , J S & Richards , S N 2017 , ' The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters ' , Astrophysical Journal , vol. 844 , no. 1 , 59 . https://doi.org/10.3847/1538-4357/aa7a11 0004-637X PURE: 252096446 PURE UUID: 9e926bb4-ba93-4c11-aa26-c18e9d7ff422 ArXiv: http://arxiv.org/abs/1704.01169v2 Scopus: 85026359665 http://hdl.handle.net/10023/12535 https://doi.org/10.3847/1538-4357/aa7a11 http://arxiv.org/abs/1704.01169v2 |
op_rights |
© 2017, American Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.3847/1538-4357/aa7a11 |
op_doi |
https://doi.org/10.3847/1538-4357/aa7a11 |
container_title |
The Astrophysical Journal |
container_volume |
844 |
container_issue |
1 |
container_start_page |
59 |
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1770273696344178688 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/12535 2023-07-02T03:33:39+02:00 The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters Brough, Sarah Sande, Jesse van de Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bland-Hawthorn, Joss Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory López-Sánchez, Á. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. University of St Andrews. School of Physics and Astronomy 2018-01-19T16:30:13Z 12 application/pdf http://hdl.handle.net/10023/12535 https://doi.org/10.3847/1538-4357/aa7a11 http://arxiv.org/abs/1704.01169v2 eng eng Astrophysical Journal Brough , S , Sande , J V D , Owers , M S , d'Eugenio , F , Sharp , R , Cortese , L , Scott , N , Croom , S M , Bassett , R , Bekki , K , Bland-Hawthorn , J , Bryant , J J , Davies , R , Drinkwater , M J , Driver , S P , Foster , C , Goldstein , G , López-Sánchez , Á R , Medling , A M , Sweet , S M , Taranu , D S , Tonini , C , Yi , S K , Goodwin , M , Lawrence , J S & Richards , S N 2017 , ' The SAMI Galaxy Survey : mass as the driver of the kinematic morphology - density relation in clusters ' , Astrophysical Journal , vol. 844 , no. 1 , 59 . https://doi.org/10.3847/1538-4357/aa7a11 0004-637X PURE: 252096446 PURE UUID: 9e926bb4-ba93-4c11-aa26-c18e9d7ff422 ArXiv: http://arxiv.org/abs/1704.01169v2 Scopus: 85026359665 http://hdl.handle.net/10023/12535 https://doi.org/10.3847/1538-4357/aa7a11 http://arxiv.org/abs/1704.01169v2 © 2017, American Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.3847/1538-4357/aa7a11 Galaxies: clusters: general Galaxies: elliptical and lenticular cD Galaxies: evolution Galaxies: groups: general Galaxies: kinematics and dynamics QB Astronomy QC Physics 3rd-DAS QB QC Journal article 2018 ftstandrewserep https://doi.org/10.3847/1538-4357/aa7a11 2023-06-13T18:28:48Z We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral-field spectrograph Galaxy Survey. The clusters cover a mass range of 14.2log(M200/M☉) <15.2 and we measure spatially resolved stellar kinematics for 315 member galaxies with stellar masses 10.0 < log(M*/M☉) ≤ 11.7 within 1 R 200 of the cluster centers. We calculate the spin parameter, λ R , and use this to classify the kinematic morphology of the galaxies as fast or slow rotators (SRs). The total fraction of SRs in the ETG population is F SR = 0.14 ± 0.02 and does not depend on host cluster mass. Across the eight clusters, the fraction of SRs increases with increasing local overdensity. We also find that the slow-rotator fraction increases at small clustercentric radii (R cl < 0.3 R 200), and note that there is also an increase in the slow-rotator fraction at R cl ~ 0.6 R 200. The SRs at these larger radii reside in the cluster substructure. We find that the strongest increase in the slow-rotator fraction occurs with increasing stellar mass. After accounting for the strong correlation with stellar mass, we find no significant relationship between spin parameter and local overdensity in the cluster environment. We conclude that the primary driver for the kinematic morphology–density relationship in galaxy clusters is the changing distribution of galaxy stellar mass with the local environment. The presence of SRs in the substructure suggests that the cluster kinematic morphology–density relationship is a result of mass segregation of slow-rotating galaxies forming in groups that later merge with clusters and sink to the cluster center via dynamical friction. Publisher PDF Peer reviewed Article in Journal/Newspaper sami University of St Andrews: Digital Research Repository The Astrophysical Journal 844 1 59 |