The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence
We study the balance in dynamical support of 384 galaxies with stellar kinematics out to ≥1.5R e in the Sydney AAO Multi-object Integral Field (SAMI) Galaxy Survey. We present radial dynamical profiles of the local rotation dominance parameter, V/σ, and local spin, λ loc. Although there is a broad r...
Published in: | Monthly Notices of the Royal Astronomical Society |
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2018
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Online Access: | https://researchers.mq.edu.au/en/publications/a38e225e-e279-4aef-96b1-b3a639d7c8a8 https://doi.org/10.1093/MNRAS/STY2059 http://www.scopus.com/inward/record.url?scp=85055264264&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE170100013 |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/a38e225e-e279-4aef-96b1-b3a639d7c8a8 2024-09-15T18:33:22+00:00 The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence Foster, C. van de Sande, J. Cortese, L. Croom, S. M. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Goodwin, M. Lawrence, J. S. Lorente, N. Medling, A. M. Owers, M. Richards, S. N. Scott, N. 2018-11-01 https://researchers.mq.edu.au/en/publications/a38e225e-e279-4aef-96b1-b3a639d7c8a8 https://doi.org/10.1093/MNRAS/STY2059 http://www.scopus.com/inward/record.url?scp=85055264264&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE170100013 eng eng info:eu-repo/semantics/closedAccess Foster , C , van de Sande , J , Cortese , L , Croom , S M , Bland-Hawthorn , J , Brough , S , Bryant , J J , Goodwin , M , Lawrence , J S , Lorente , N , Medling , A M , Owers , M , Richards , S N & Scott , N 2018 , ' The SAMI Galaxy Survey : embedded discs and radial trends in outer dynamical support across the Hubble sequence ' , Monthly Notices of the Royal Astronomical Society , vol. 480 , no. 3 , pp. 3105-3116 . https://doi.org/10.1093/MNRAS/STY2059 Galaxies: fundamental parameters Galaxies: kinematics and dynamics article 2018 ftmacquarieunicr https://doi.org/10.1093/MNRAS/STY2059 2024-08-28T23:47:18Z We study the balance in dynamical support of 384 galaxies with stellar kinematics out to ≥1.5R e in the Sydney AAO Multi-object Integral Field (SAMI) Galaxy Survey. We present radial dynamical profiles of the local rotation dominance parameter, V/σ, and local spin, λ loc. Although there is a broad range in amplitude, most kinematic profiles monotonically increase across the probed radial range. We do not find many galaxies with kinematic transitions such as those expected between the inner in situ and outer accreted stars within the radial range probed. We compare the V/σ gradient and maximum values to the visual morphologies of the galaxies to better understand the link between visual and kinematic morphologies. We find that the radial distribution of dynamical support in galaxies is linked to their visual morphology. Late-type systems have higher rotational support at all radii and steeper V/σ gradients compared to earlytype galaxies. We perform a search for embedded discs, which are rotationally supported discy structures embedded within large scale slowly or non-rotating structures. Visual inspection of the kinematics reveals at most 3 galaxies (out of 384) harbouring embedded discs. This is more than an order of magnitude fewer than the observed fraction in some local studies. Our tests suggest that this tension can be attributed to differences in the sample selection, spatial sampling, and beam smearing due to seeing. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 480 3 3105 3116 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
Galaxies: fundamental parameters Galaxies: kinematics and dynamics |
spellingShingle |
Galaxies: fundamental parameters Galaxies: kinematics and dynamics Foster, C. van de Sande, J. Cortese, L. Croom, S. M. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Goodwin, M. Lawrence, J. S. Lorente, N. Medling, A. M. Owers, M. Richards, S. N. Scott, N. The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
topic_facet |
Galaxies: fundamental parameters Galaxies: kinematics and dynamics |
description |
We study the balance in dynamical support of 384 galaxies with stellar kinematics out to ≥1.5R e in the Sydney AAO Multi-object Integral Field (SAMI) Galaxy Survey. We present radial dynamical profiles of the local rotation dominance parameter, V/σ, and local spin, λ loc. Although there is a broad range in amplitude, most kinematic profiles monotonically increase across the probed radial range. We do not find many galaxies with kinematic transitions such as those expected between the inner in situ and outer accreted stars within the radial range probed. We compare the V/σ gradient and maximum values to the visual morphologies of the galaxies to better understand the link between visual and kinematic morphologies. We find that the radial distribution of dynamical support in galaxies is linked to their visual morphology. Late-type systems have higher rotational support at all radii and steeper V/σ gradients compared to earlytype galaxies. We perform a search for embedded discs, which are rotationally supported discy structures embedded within large scale slowly or non-rotating structures. Visual inspection of the kinematics reveals at most 3 galaxies (out of 384) harbouring embedded discs. This is more than an order of magnitude fewer than the observed fraction in some local studies. Our tests suggest that this tension can be attributed to differences in the sample selection, spatial sampling, and beam smearing due to seeing. |
format |
Article in Journal/Newspaper |
author |
Foster, C. van de Sande, J. Cortese, L. Croom, S. M. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Goodwin, M. Lawrence, J. S. Lorente, N. Medling, A. M. Owers, M. Richards, S. N. Scott, N. |
author_facet |
Foster, C. van de Sande, J. Cortese, L. Croom, S. M. Bland-Hawthorn, J. Brough, S. Bryant, J. J. Goodwin, M. Lawrence, J. S. Lorente, N. Medling, A. M. Owers, M. Richards, S. N. Scott, N. |
author_sort |
Foster, C. |
title |
The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
title_short |
The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
title_full |
The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
title_fullStr |
The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
title_full_unstemmed |
The SAMI Galaxy Survey:embedded discs and radial trends in outer dynamical support across the Hubble sequence |
title_sort |
sami galaxy survey:embedded discs and radial trends in outer dynamical support across the hubble sequence |
publishDate |
2018 |
url |
https://researchers.mq.edu.au/en/publications/a38e225e-e279-4aef-96b1-b3a639d7c8a8 https://doi.org/10.1093/MNRAS/STY2059 http://www.scopus.com/inward/record.url?scp=85055264264&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/FT140100255 http://purl.org/au-research/grants/arc/CE170100013 |
genre |
sami |
genre_facet |
sami |
op_source |
Foster , C , van de Sande , J , Cortese , L , Croom , S M , Bland-Hawthorn , J , Brough , S , Bryant , J J , Goodwin , M , Lawrence , J S , Lorente , N , Medling , A M , Owers , M , Richards , S N & Scott , N 2018 , ' The SAMI Galaxy Survey : embedded discs and radial trends in outer dynamical support across the Hubble sequence ' , Monthly Notices of the Royal Astronomical Society , vol. 480 , no. 3 , pp. 3105-3116 . https://doi.org/10.1093/MNRAS/STY2059 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/MNRAS/STY2059 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
480 |
container_issue |
3 |
container_start_page |
3105 |
op_container_end_page |
3116 |
_version_ |
1810475081070018560 |