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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ftcarolinadr:cdr.lib.unc.edu:qj72pd35v 2023-12-03T10:29:45+01:00 The SAMI Galaxy Survey: asymmetry in gas kinematics and its links to stellar mass and star formation Bloom, Fogarty, Croom, Schaefer, Bryant, Cortese, Richards, Bland-Hawthorn, Ho, Scott, Goldstein, Medling, Brough, Sweet, Cecil, López-Sánchez, Glazebrook, Parker, Allen, Goodwin, Green, Konstantopoulos, Lawrence, Lorente, Owers, Sharp 2017 https://doi.org/10.17615/2qv9-2474 https://cdr.lib.unc.edu/downloads/th83m427f?file=thumbnail https://cdr.lib.unc.edu/downloads/th83m427f English eng https://doi.org/10.17615/2qv9-2474 https://cdr.lib.unc.edu/downloads/th83m427f?file=thumbnail https://cdr.lib.unc.edu/downloads/th83m427f http://rightsstatements.org/vocab/InC/1.0/ Monthly Notices of the Royal Astronomical Society, 465(1) Macquarie University. Department of Physics and Astronomy galaxies: interactions techniques: imaging spectroscopy methods: data analysis galaxies: evolution galaxies: structure galaxies: kinematics and dynamics Article 2017 ftcarolinadr https://doi.org/10.17615/2qv9-2474 2023-11-04T23:29:05Z 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 Carolina Digital Repository (UNC - University of North Carolina) Migration and Diversity 2 2 221 226 |
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Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Macquarie University. Department of Physics and Astronomy galaxies: interactions techniques: imaging spectroscopy methods: data analysis galaxies: evolution galaxies: structure galaxies: kinematics and dynamics |
spellingShingle |
Macquarie University. Department of Physics and Astronomy galaxies: interactions techniques: imaging spectroscopy methods: data analysis galaxies: evolution galaxies: structure galaxies: kinematics and dynamics Bloom, Fogarty, Croom, Schaefer, Bryant, Cortese, Richards, Bland-Hawthorn, Ho, Scott, Goldstein, Medling, Brough, Sweet, Cecil, López-Sánchez, Glazebrook, Parker, Allen, Goodwin, Green, Konstantopoulos, Lawrence, Lorente, Owers, Sharp The SAMI Galaxy Survey: asymmetry in gas kinematics and its links to stellar mass and star formation |
topic_facet |
Macquarie University. Department of Physics and Astronomy galaxies: interactions techniques: imaging spectroscopy methods: data analysis galaxies: evolution galaxies: structure galaxies: kinematics and dynamics |
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, Fogarty, Croom, Schaefer, Bryant, Cortese, Richards, Bland-Hawthorn, Ho, Scott, Goldstein, Medling, Brough, Sweet, Cecil, López-Sánchez, Glazebrook, Parker, Allen, Goodwin, Green, Konstantopoulos, Lawrence, Lorente, Owers, Sharp |
author_facet |
Bloom, Fogarty, Croom, Schaefer, Bryant, Cortese, Richards, Bland-Hawthorn, Ho, Scott, Goldstein, Medling, Brough, Sweet, Cecil, López-Sánchez, Glazebrook, Parker, Allen, Goodwin, Green, Konstantopoulos, Lawrence, Lorente, Owers, Sharp |
author_sort |
Bloom, |
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 |
publishDate |
2017 |
url |
https://doi.org/10.17615/2qv9-2474 https://cdr.lib.unc.edu/downloads/th83m427f?file=thumbnail https://cdr.lib.unc.edu/downloads/th83m427f |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, 465(1) |
op_relation |
https://doi.org/10.17615/2qv9-2474 https://cdr.lib.unc.edu/downloads/th83m427f?file=thumbnail https://cdr.lib.unc.edu/downloads/th83m427f |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/2qv9-2474 |
container_title |
Migration and Diversity |
container_volume |
2 |
container_issue |
2 |
container_start_page |
221 |
op_container_end_page |
226 |
_version_ |
1784255279197585408 |