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 (SAMI) Galaxy Survey. The clusters cover a mass range of 14.2〈log(M_200/M_sun)〈15.2 and we measure spatially-resolved stellar kinematics for 293 clust...
Published in: | The Astrophysical Journal |
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Format: | Article in Journal/Newspaper |
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Institute of Physics Publishing, Inc.
2017
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Online Access: | http://hdl.handle.net/1959.3/435910 https://doi.org/10.3847/1538-4357/aa7a11 |
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ftswinburne:tle:295a308e-bb2f-4fc8-89ed-dd917f711931:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T18:11:52+02:00 The SAMI galaxy survey: mass as the driver of the kinematic morphology - density relation in clusters Brough, Sarah van de Sande, Jesse Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory Lopez-Sanchez, A. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. Swinburne University of Technology 2017 http://hdl.handle.net/1959.3/435910 https://doi.org/10.3847/1538-4357/aa7a11 unknown Institute of Physics Publishing, Inc. http://purl.org/au-research/grants/arc/FF0776384 http://purl.org/au-research/grants/arc/LE130100198 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT100100457 http://hdl.handle.net/1959.3/435910 https://doi.org/10.3847/1538-4357/aa7a11 Copyright © 2017. The American Astronomical Society. All rights reserved. The published version is reproduced in accordance with the copyright policy of the publisher. The Astrophysical Journal, Vol. 844, no. 1 (Jul 2017), article no. 59 Journal article 2017 ftswinburne https://doi.org/10.3847/1538-4357/aa7a11 2019-09-07T21:31:25Z We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. The clusters cover a mass range of 14.2〈log(M_200/M_sun)〈15.2 and we measure spatially-resolved stellar kinematics for 293 cluster members within 1R_200 of the cluster centers. We calculate the spin parameter, lambda_R for these galaxies and use that to classify the kinematic morphology of the galaxies as fast (high spin parameter) or slow (low spin parameter) rotators. The total fraction of slow rotators in the early-type galaxy population, F_SR=0.14+/-0.02 and does not depend on host cluster mass. Across the eight clusters, the fraction of slow rotators increases with increasing local environmental overdensity. We also find that the slow-rotator fraction increases at small clustercentric radii (R_cl〈0.3R_200), and note that there is also an enhancement in slow-rotator fraction at R_cl~0.6R_200 in cluster substructure. We find the strongest increase in 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 therefore conclude that the primary driver for the kinematic morphology--density relationship in galaxy clusters is the changing distribution of galaxy stellar mass with local environment. The presence of slow rotators in cluster substructure suggests that the cluster kinematic morphology--density relationship is a result of mass segregation of slow-rotating galaxies forming in galaxy groups that later merge with clusters and sink to the cluster center via dynamical friction. Article in Journal/Newspaper sami Swinburne University of Technology: Swinburne Research Bank The Astrophysical Journal 844 1 59 |
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Swinburne University of Technology: Swinburne Research Bank |
op_collection_id |
ftswinburne |
language |
unknown |
description |
We examine the kinematic morphology of early-type galaxies (ETGs) in eight galaxy clusters in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. The clusters cover a mass range of 14.2〈log(M_200/M_sun)〈15.2 and we measure spatially-resolved stellar kinematics for 293 cluster members within 1R_200 of the cluster centers. We calculate the spin parameter, lambda_R for these galaxies and use that to classify the kinematic morphology of the galaxies as fast (high spin parameter) or slow (low spin parameter) rotators. The total fraction of slow rotators in the early-type galaxy population, F_SR=0.14+/-0.02 and does not depend on host cluster mass. Across the eight clusters, the fraction of slow rotators increases with increasing local environmental overdensity. We also find that the slow-rotator fraction increases at small clustercentric radii (R_cl〈0.3R_200), and note that there is also an enhancement in slow-rotator fraction at R_cl~0.6R_200 in cluster substructure. We find the strongest increase in 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 therefore conclude that the primary driver for the kinematic morphology--density relationship in galaxy clusters is the changing distribution of galaxy stellar mass with local environment. The presence of slow rotators in cluster substructure suggests that the cluster kinematic morphology--density relationship is a result of mass segregation of slow-rotating galaxies forming in galaxy groups that later merge with clusters and sink to the cluster center via dynamical friction. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Brough, Sarah van de Sande, Jesse Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory Lopez-Sanchez, A. R. Medling, Anne M. Sweet, Sarah M. Taranu, Dan S. Tonini, Chiara Yi, Sukyoung K. Goodwin, Michael Lawrence, J. S. Richards, Samuel N. |
spellingShingle |
Brough, Sarah van de Sande, Jesse Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory Lopez-Sanchez, A. 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 |
author_facet |
Brough, Sarah van de Sande, Jesse Owers, Matt S. d'Eugenio, Francesco Sharp, Rob Cortese, Luca Scott, Nicholas Croom, Scott M. Bassett, Rob Bekki, Kenji Bryant, Julia J. Davies, Roger Drinkwater, Michael J. Driver, Simon P. Foster, Caroline Goldstein, Gregory Lopez-Sanchez, A. 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 |
publisher |
Institute of Physics Publishing, Inc. |
publishDate |
2017 |
url |
http://hdl.handle.net/1959.3/435910 https://doi.org/10.3847/1538-4357/aa7a11 |
genre |
sami |
genre_facet |
sami |
op_source |
The Astrophysical Journal, Vol. 844, no. 1 (Jul 2017), article no. 59 |
op_relation |
http://purl.org/au-research/grants/arc/FF0776384 http://purl.org/au-research/grants/arc/LE130100198 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FL140100278 http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/FT100100457 http://hdl.handle.net/1959.3/435910 https://doi.org/10.3847/1538-4357/aa7a11 |
op_rights |
Copyright © 2017. The American Astronomical Society. All rights reserved. The published version is reproduced in accordance with the copyright policy of the publisher. |
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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1766184474206273536 |