The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry
In order to determine the causes of kinematic asymmetry in the Hα gas in the SAMI (Sydney- AAO Multi-object IFS) Galaxy Survey sample, we investigate the comparative influences of environment and intrinsic properties of galaxies on perturbation. We use spatially resolved Hα velocity fields from the...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Online Access: | https://researchers.mq.edu.au/en/publications/bafc1e89-e04f-413e-a2b8-0fea4dd7cf77 https://doi.org/10.1093/MNRAS/STY273 http://www.scopus.com/inward/record.url?scp=85052470050&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/bafc1e89-e04f-413e-a2b8-0fea4dd7cf77 2024-06-23T07:56:31+00:00 The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry Bloom, J. V. Croom, S. M. Bryant, J. J. Schaefer, A. L. Bland-Hawthorn, J. Brough, S. Callingham, J. Cortese, L. Federrath, C. Scott, N. van de Sande, J. D'Eugenio, F. Sweet, S. Tonini, C. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. Lorente, N. Medling, A. M. Owers, M. S. Richards, S. N. Sharp, R. 2018-05-11 https://researchers.mq.edu.au/en/publications/bafc1e89-e04f-413e-a2b8-0fea4dd7cf77 https://doi.org/10.1093/MNRAS/STY273 http://www.scopus.com/inward/record.url?scp=85052470050&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 eng eng info:eu-repo/semantics/closedAccess Bloom , J V , Croom , S M , Bryant , J J , Schaefer , A L , Bland-Hawthorn , J , Brough , S , Callingham , J , Cortese , L , Federrath , C , Scott , N , van de Sande , J , D'Eugenio , F , Sweet , S , Tonini , C , Allen , J T , Goodwin , M , Green , A W , Konstantopoulos , I S , Lawrence , J , Lorente , N , Medling , A M , Owers , M S , Richards , S N & Sharp , R 2018 , ' The SAMI Galaxy Survey : gas content and interaction as the drivers of kinematic asymmetry ' , Monthly Notices of the Royal Astronomical Society , vol. 476 , no. 2 , pp. 2339-2351 . https://doi.org/10.1093/MNRAS/STY273 Galaxies: evolution Galaxies: interactions Galaxies: kinematics and dynamics Galaxies: structure Techniques: imaging spectroscopy article 2018 ftmacquarieunicr https://doi.org/10.1093/MNRAS/STY273 2024-05-29T23:48:43Z In order to determine the causes of kinematic asymmetry in the Hα gas in the SAMI (Sydney- AAO Multi-object IFS) Galaxy Survey sample, we investigate the comparative influences of environment and intrinsic properties of galaxies on perturbation. We use spatially resolved Hα velocity fields from the SAMI Galaxy Survey to quantify kinematic asymmetry (v asym ) in nearby galaxies and environmental and stellar mass data from the Galaxy And Mass Assembly survey. We find that local environment, measured as distance to nearest neighbour, is inversely correlated with kinematic asymmetry for galaxies with log (M*/M ⊙ ) > 10.0, but there is no significant correlation for galaxies with log (M*/M ⊙ ) < 10.0. Moreover, lowmass galaxies [log (M*/M ⊙ ) < 9.0] have greater kinematic asymmetry at all separations, suggesting a different physical source of asymmetry is important in low-mass galaxies. We propose that secular effects derived from gas fraction and gas mass may be the primary causes of asymmetry in low-mass galaxies. High gas fraction is linked to high σm/V (where σm is Hα velocity dispersion and V the rotation velocity), which is strongly correlated with v asym , and galaxies with log (M*/M ⊙ ) < 9.0 have offset σm/V from the rest of the sample. Further, asymmetry as a fraction of dispersion decreases for galaxies with log (M*/M ⊙ ) < 9.0. Gas mass and asymmetry are also inversely correlated in our sample. We propose that low gas masses in dwarf galaxies may lead to asymmetric distribution of gas clouds, leading to increased relative turbulence. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 476 2 2339 2351 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
Galaxies: evolution Galaxies: interactions Galaxies: kinematics and dynamics Galaxies: structure Techniques: imaging spectroscopy |
spellingShingle |
Galaxies: evolution Galaxies: interactions Galaxies: kinematics and dynamics Galaxies: structure Techniques: imaging spectroscopy Bloom, J. V. Croom, S. M. Bryant, J. J. Schaefer, A. L. Bland-Hawthorn, J. Brough, S. Callingham, J. Cortese, L. Federrath, C. Scott, N. van de Sande, J. D'Eugenio, F. Sweet, S. Tonini, C. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. Lorente, N. Medling, A. M. Owers, M. S. Richards, S. N. Sharp, R. The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
topic_facet |
Galaxies: evolution Galaxies: interactions Galaxies: kinematics and dynamics Galaxies: structure Techniques: imaging spectroscopy |
description |
In order to determine the causes of kinematic asymmetry in the Hα gas in the SAMI (Sydney- AAO Multi-object IFS) Galaxy Survey sample, we investigate the comparative influences of environment and intrinsic properties of galaxies on perturbation. We use spatially resolved Hα velocity fields from the SAMI Galaxy Survey to quantify kinematic asymmetry (v asym ) in nearby galaxies and environmental and stellar mass data from the Galaxy And Mass Assembly survey. We find that local environment, measured as distance to nearest neighbour, is inversely correlated with kinematic asymmetry for galaxies with log (M*/M ⊙ ) > 10.0, but there is no significant correlation for galaxies with log (M*/M ⊙ ) < 10.0. Moreover, lowmass galaxies [log (M*/M ⊙ ) < 9.0] have greater kinematic asymmetry at all separations, suggesting a different physical source of asymmetry is important in low-mass galaxies. We propose that secular effects derived from gas fraction and gas mass may be the primary causes of asymmetry in low-mass galaxies. High gas fraction is linked to high σm/V (where σm is Hα velocity dispersion and V the rotation velocity), which is strongly correlated with v asym , and galaxies with log (M*/M ⊙ ) < 9.0 have offset σm/V from the rest of the sample. Further, asymmetry as a fraction of dispersion decreases for galaxies with log (M*/M ⊙ ) < 9.0. Gas mass and asymmetry are also inversely correlated in our sample. We propose that low gas masses in dwarf galaxies may lead to asymmetric distribution of gas clouds, leading to increased relative turbulence. |
format |
Article in Journal/Newspaper |
author |
Bloom, J. V. Croom, S. M. Bryant, J. J. Schaefer, A. L. Bland-Hawthorn, J. Brough, S. Callingham, J. Cortese, L. Federrath, C. Scott, N. van de Sande, J. D'Eugenio, F. Sweet, S. Tonini, C. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. Lorente, N. Medling, A. M. Owers, M. S. Richards, S. N. Sharp, R. |
author_facet |
Bloom, J. V. Croom, S. M. Bryant, J. J. Schaefer, A. L. Bland-Hawthorn, J. Brough, S. Callingham, J. Cortese, L. Federrath, C. Scott, N. van de Sande, J. D'Eugenio, F. Sweet, S. Tonini, C. Allen, J. T. Goodwin, M. Green, A. W. Konstantopoulos, I. S. Lawrence, J. Lorente, N. Medling, A. M. Owers, M. S. Richards, S. N. Sharp, R. |
author_sort |
Bloom, J. V. |
title |
The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
title_short |
The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
title_full |
The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
title_fullStr |
The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
title_full_unstemmed |
The SAMI Galaxy Survey:gas content and interaction as the drivers of kinematic asymmetry |
title_sort |
sami galaxy survey:gas content and interaction as the drivers of kinematic asymmetry |
publishDate |
2018 |
url |
https://researchers.mq.edu.au/en/publications/bafc1e89-e04f-413e-a2b8-0fea4dd7cf77 https://doi.org/10.1093/MNRAS/STY273 http://www.scopus.com/inward/record.url?scp=85052470050&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 |
genre |
sami |
genre_facet |
sami |
op_source |
Bloom , J V , Croom , S M , Bryant , J J , Schaefer , A L , Bland-Hawthorn , J , Brough , S , Callingham , J , Cortese , L , Federrath , C , Scott , N , van de Sande , J , D'Eugenio , F , Sweet , S , Tonini , C , Allen , J T , Goodwin , M , Green , A W , Konstantopoulos , I S , Lawrence , J , Lorente , N , Medling , A M , Owers , M S , Richards , S N & Sharp , R 2018 , ' The SAMI Galaxy Survey : gas content and interaction as the drivers of kinematic asymmetry ' , Monthly Notices of the Royal Astronomical Society , vol. 476 , no. 2 , pp. 2339-2351 . https://doi.org/10.1093/MNRAS/STY273 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/MNRAS/STY273 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
476 |
container_issue |
2 |
container_start_page |
2339 |
op_container_end_page |
2351 |
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1802649662918754304 |