The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399
We examine the kinematic morphology of early-type galaxies (ETGs) in three galaxy clusters Abell 85, 168 and 2399. Using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) we measured spatially-resolved kinematics for 79 ETGs in these clusters. We calculate $λ_{R}$, a proxy for...
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ftdatacite:10.48550/arxiv.1406.3899 2023-05-15T18:11:52+02:00 The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 Fogarty, L. M. R. Scott, Nicholas Owers, Matt S. Brough, S. Croom, Scott M. Pracy, Michael B. Houghton, R. C. W. Bland-Hawthorn, Joss Colless, Matthew Davies, Roger L. Jones, D. Heath Allen, J. T. Bryant, Julia J. Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Cortese, Luca Sharp, Rob 2014 https://dx.doi.org/10.48550/arxiv.1406.3899 https://arxiv.org/abs/1406.3899 unknown arXiv https://dx.doi.org/10.1093/mnras/stu1165 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2014 ftdatacite https://doi.org/10.48550/arxiv.1406.3899 https://doi.org/10.1093/mnras/stu1165 2022-04-01T12:46:34Z We examine the kinematic morphology of early-type galaxies (ETGs) in three galaxy clusters Abell 85, 168 and 2399. Using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) we measured spatially-resolved kinematics for 79 ETGs in these clusters. We calculate $λ_{R}$, a proxy for the projected specific stellar angular momentum, for each galaxy and classify the 79 ETGs in our samples as fast or slow rotators. We calculate the fraction of slow rotators in the ETG populations ($f_{SR}$) of the clusters to be $0.21\pm0.08$, $0.08\pm0.08$ and $0.12\pm0.06$ for Abell 85, 168 and 2399 respectively, with an overall fraction of $0.15\pm0.04$. These numbers are broadly consistent with the values found in the literature, confirming recent work asserting that the fraction of slow rotators in the ETG population is constant across many orders of magnitude in global environment. We examine the distribution of kinematic classes in each cluster as a function of environment using the projected density of galaxies: the kinematic morphology-density relation. We find that in Abell 85 $f_{SR}$ increases in higher density regions but in Abell 168 and Abell 2399 this trend is not seen. We examine the differences between the individual clusters to explain this. In addition, we find slow rotators on the outskirts of two of the clusters studied, Abell 85 and 2399. These galaxies reside in intermediate to low density regions and have clearly not formed at the centre of a cluster environment. We hypothesise that they formed at the centres of groups and are falling into the clusters for the first time. : 21 pages, 13 figures, accepted for publication in MNRAS Text sami DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Fogarty, L. M. R. Scott, Nicholas Owers, Matt S. Brough, S. Croom, Scott M. Pracy, Michael B. Houghton, R. C. W. Bland-Hawthorn, Joss Colless, Matthew Davies, Roger L. Jones, D. Heath Allen, J. T. Bryant, Julia J. Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Cortese, Luca Sharp, Rob The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We examine the kinematic morphology of early-type galaxies (ETGs) in three galaxy clusters Abell 85, 168 and 2399. Using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) we measured spatially-resolved kinematics for 79 ETGs in these clusters. We calculate $λ_{R}$, a proxy for the projected specific stellar angular momentum, for each galaxy and classify the 79 ETGs in our samples as fast or slow rotators. We calculate the fraction of slow rotators in the ETG populations ($f_{SR}$) of the clusters to be $0.21\pm0.08$, $0.08\pm0.08$ and $0.12\pm0.06$ for Abell 85, 168 and 2399 respectively, with an overall fraction of $0.15\pm0.04$. These numbers are broadly consistent with the values found in the literature, confirming recent work asserting that the fraction of slow rotators in the ETG population is constant across many orders of magnitude in global environment. We examine the distribution of kinematic classes in each cluster as a function of environment using the projected density of galaxies: the kinematic morphology-density relation. We find that in Abell 85 $f_{SR}$ increases in higher density regions but in Abell 168 and Abell 2399 this trend is not seen. We examine the differences between the individual clusters to explain this. In addition, we find slow rotators on the outskirts of two of the clusters studied, Abell 85 and 2399. These galaxies reside in intermediate to low density regions and have clearly not formed at the centre of a cluster environment. We hypothesise that they formed at the centres of groups and are falling into the clusters for the first time. : 21 pages, 13 figures, accepted for publication in MNRAS |
format |
Text |
author |
Fogarty, L. M. R. Scott, Nicholas Owers, Matt S. Brough, S. Croom, Scott M. Pracy, Michael B. Houghton, R. C. W. Bland-Hawthorn, Joss Colless, Matthew Davies, Roger L. Jones, D. Heath Allen, J. T. Bryant, Julia J. Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Cortese, Luca Sharp, Rob |
author_facet |
Fogarty, L. M. R. Scott, Nicholas Owers, Matt S. Brough, S. Croom, Scott M. Pracy, Michael B. Houghton, R. C. W. Bland-Hawthorn, Joss Colless, Matthew Davies, Roger L. Jones, D. Heath Allen, J. T. Bryant, Julia J. Goodwin, Michael Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, J. S. Richards, Samuel Cortese, Luca Sharp, Rob |
author_sort |
Fogarty, L. M. R. |
title |
The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
title_short |
The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
title_full |
The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
title_fullStr |
The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
title_full_unstemmed |
The SAMI Pilot Survey: The Kinematic Morphology-Density Relation in Abell 85, Abell 168 and Abell 2399 |
title_sort |
sami pilot survey: the kinematic morphology-density relation in abell 85, abell 168 and abell 2399 |
publisher |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1406.3899 https://arxiv.org/abs/1406.3899 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/stu1165 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1406.3899 https://doi.org/10.1093/mnras/stu1165 |
_version_ |
1766184473830883328 |