The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation
We study the properties of kinematically disturbed galaxies in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey using a quantitative criterion, based on kinemetry (Krajnović et al.). The approach, similar to the application of kinemetry by Shapiro et al., uses ionized gas...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Oxford University Press
2017
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Online Access: | http://hdl.handle.net/1959.3/435233 https://doi.org/10.1093/mnras/stw2605 |
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ftswinburne:tle:f122b2d5-9cf3-45d9-80ea-1a0dce882329:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T18:11:13+02:00 The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation Bloom, J. V. Fogarty, L. M. R. Croom, S. M. Schaefer, A. Bryant, J. J. Cortese, L. Richards, S. Bland-Hawthorn, J. Ho, I. T. Scott, N. Goldstein, G. Medling, A. Brough, S. Sweet, S. M. Cecil, G. Lopez-Sanchez, A. Glazebrook, K. Parker, Q. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. Owers, M. S. Sharp, R. Swinburne University of Technology 2017 http://hdl.handle.net/1959.3/435233 https://doi.org/10.1093/mnras/stw2605 unknown Oxford University Press http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/DP130100664 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT140100255 http://hdl.handle.net/1959.3/435233 https://doi.org/10.1093/mnras/stw2605 This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society ©: 2016 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. Monthly Notices of the Royal Astronomical Society, Vol. 465, no. 1 (Feb 2017), pp. 123-148 Journal article 2017 ftswinburne https://doi.org/10.1093/mnras/stw2605 2019-09-07T21:30:28Z We study the properties of kinematically disturbed galaxies in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey using a quantitative criterion, based on kinemetry (Krajnović et al.). The approach, similar to the application of kinemetry by Shapiro et al., uses ionized gas kinematics, probed by Ha emission. By this method, 23 ± 7 per cent of our 360-galaxy sub-sample of the SAMI Galaxy Survey are kinematically asymmetric. Visual classifications agree with our kinemetric results for 90 per cent of asymmetric and 95 per cent of normal galaxies.We find that stellar mass and kinematic asymmetry are inversely correlated and that kinematic asymmetry is both more frequent and stronger in low-mass galaxies. This builds on previous studies that found high fractions of kinematic asymmetry in low-mass galaxies using a variety of different methods. Concentration of star formation and kinematic disturbance are found to be correlated, confirming results found in previous work. This effect is stronger for high-mass galaxies (log(M*) > 10) and indicates that kinematic disturbance is linked to centrally concentrated star formation. Comparison of the inner (within 0.5Re) and outer Ha equivalent widths of asymmetric and normal galaxies shows a small but significant increase in inner equivalent width for asymmetric galaxies. Article in Journal/Newspaper sami Swinburne University of Technology: Swinburne Research Bank Monthly Notices of the Royal Astronomical Society 465 1 123 148 |
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Swinburne University of Technology: Swinburne Research Bank |
op_collection_id |
ftswinburne |
language |
unknown |
description |
We study the properties of kinematically disturbed galaxies in the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey using a quantitative criterion, based on kinemetry (Krajnović et al.). The approach, similar to the application of kinemetry by Shapiro et al., uses ionized gas kinematics, probed by Ha emission. By this method, 23 ± 7 per cent of our 360-galaxy sub-sample of the SAMI Galaxy Survey are kinematically asymmetric. Visual classifications agree with our kinemetric results for 90 per cent of asymmetric and 95 per cent of normal galaxies.We find that stellar mass and kinematic asymmetry are inversely correlated and that kinematic asymmetry is both more frequent and stronger in low-mass galaxies. This builds on previous studies that found high fractions of kinematic asymmetry in low-mass galaxies using a variety of different methods. Concentration of star formation and kinematic disturbance are found to be correlated, confirming results found in previous work. This effect is stronger for high-mass galaxies (log(M*) > 10) and indicates that kinematic disturbance is linked to centrally concentrated star formation. Comparison of the inner (within 0.5Re) and outer Ha equivalent widths of asymmetric and normal galaxies shows a small but significant increase in inner equivalent width for asymmetric galaxies. |
author2 |
Swinburne University of Technology |
format |
Article in Journal/Newspaper |
author |
Bloom, J. V. Fogarty, L. M. R. Croom, S. M. Schaefer, A. Bryant, J. J. Cortese, L. Richards, S. Bland-Hawthorn, J. Ho, I. T. Scott, N. Goldstein, G. Medling, A. Brough, S. Sweet, S. M. Cecil, G. Lopez-Sanchez, A. Glazebrook, K. Parker, Q. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. Owers, M. S. Sharp, R. |
spellingShingle |
Bloom, J. V. Fogarty, L. M. R. Croom, S. M. Schaefer, A. Bryant, J. J. Cortese, L. Richards, S. Bland-Hawthorn, J. Ho, I. T. Scott, N. Goldstein, G. Medling, A. Brough, S. Sweet, S. M. Cecil, G. Lopez-Sanchez, A. Glazebrook, K. Parker, Q. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. Owers, M. S. Sharp, R. The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
author_facet |
Bloom, J. V. Fogarty, L. M. R. Croom, S. M. Schaefer, A. Bryant, J. J. Cortese, L. Richards, S. Bland-Hawthorn, J. Ho, I. T. Scott, N. Goldstein, G. Medling, A. Brough, S. Sweet, S. M. Cecil, G. Lopez-Sanchez, A. Glazebrook, K. Parker, Q. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. S. Lorente, N. Owers, M. S. Sharp, R. |
author_sort |
Bloom, J. V. |
title |
The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
title_short |
The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
title_full |
The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
title_fullStr |
The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
title_full_unstemmed |
The SAMI galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
title_sort |
sami galaxy survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
publisher |
Oxford University Press |
publishDate |
2017 |
url |
http://hdl.handle.net/1959.3/435233 https://doi.org/10.1093/mnras/stw2605 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, Vol. 465, no. 1 (Feb 2017), pp. 123-148 |
op_relation |
http://purl.org/au-research/grants/arc/CE110001020 http://purl.org/au-research/grants/arc/FT100100457 http://purl.org/au-research/grants/arc/DP130100664 http://purl.org/au-research/grants/arc/FT140101166 http://purl.org/au-research/grants/arc/FT140100255 http://hdl.handle.net/1959.3/435233 https://doi.org/10.1093/mnras/stw2605 |
op_rights |
This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society ©: 2016 the authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
op_doi |
https://doi.org/10.1093/mnras/stw2605 |
container_title |
Monthly Notices of the Royal Astronomical Society |
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465 |
container_issue |
1 |
container_start_page |
123 |
op_container_end_page |
148 |
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1766183908218503168 |