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...
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Oxford University Press
2016
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:af6b27f 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. López-Sánchez, 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. 2016-10-12 https://espace.library.uq.edu.au/view/UQ:af6b27f/UQaf6b27f_OA.pdf https://espace.library.uq.edu.au/view/UQ:af6b27f unknown Oxford University Press doi:10.1093/mnras/stw2605 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 DP130100664 %7C CE110001020 Journal Article 2016 ftunivqespace https://doi.org/10.1093/mnras/stw2605 2020-08-06T19:56:53Z 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 H α 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 H α 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 The University of Queensland: UQ eSpace Monthly Notices of the Royal Astronomical Society 465 1 123 148 |
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The University of Queensland: UQ eSpace |
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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 H α 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 H α equivalent widths of asymmetric and normal galaxies shows a small but significant increase in inner equivalent width for asymmetric galaxies. |
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. López-Sánchez, 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. López-Sánchez, 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. López-Sánchez, 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 |
2016 |
url |
https://espace.library.uq.edu.au/view/UQ:af6b27f/UQaf6b27f_OA.pdf https://espace.library.uq.edu.au/view/UQ:af6b27f |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.1093/mnras/stw2605 issn:0035-8711 issn:1365-2966 orcid:0000-0002-1576-2505 DP130100664 %7C CE110001020 |
op_doi |
https://doi.org/10.1093/mnras/stw2605 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
465 |
container_issue |
1 |
container_start_page |
123 |
op_container_end_page |
148 |
_version_ |
1766183906886811648 |