The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations
We explore local and global dynamical differences between the kinematics of ionized gas and stars in a sample of galaxies from Data Release 3 of the SAMI Galaxy Survey. We find better agreement between local (i.e. comparing on a spaxel-to-spaxel basis) velocities and dispersion of gas and stars in y...
Published in: | Monthly Notices of the Royal Astronomical Society |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
|
Subjects: | |
Online Access: | https://researchers.mq.edu.au/en/publications/7c385ba9-db3a-465d-bb75-59cb2eb25abb https://doi.org/10.1093/mnras/stad487 http://www.scopus.com/inward/record.url?scp=85150605882&partnerID=8YFLogxK |
id |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/7c385ba9-db3a-465d-bb75-59cb2eb25abb |
---|---|
record_format |
openpolar |
spelling |
ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/7c385ba9-db3a-465d-bb75-59cb2eb25abb 2024-06-23T07:56:32+00:00 The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations Foster, Caroline Vaughan, Sam Fraser-McKelvie, Amelia Brough, Sarah Bryant, Julia J. Croom, Scott M D’Eugenio, Francesco Groves, Brent Konstantopoulos, Iraklis S. López-Sánchez, Ángel R. Oh, Sree Owers, Matt S. Sweet, Sarah M. van de Sande, Jesse Wisnioski, Emily Yi, Sukyoung K Zovaro, Henry R. M. 2023-05-01 https://researchers.mq.edu.au/en/publications/7c385ba9-db3a-465d-bb75-59cb2eb25abb https://doi.org/10.1093/mnras/stad487 http://www.scopus.com/inward/record.url?scp=85150605882&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Foster , C , Vaughan , S , Fraser-McKelvie , A , Brough , S , Bryant , J J , Croom , S M , D’Eugenio , F , Groves , B , Konstantopoulos , I S , López-Sánchez , Á R , Oh , S , Owers , M S , Sweet , S M , van de Sande , J , Wisnioski , E , Yi , S K & Zovaro , H R M 2023 , ' The SAMI survey : evidence for dynamical coupling of ionized gas and young stellar populations ' , Monthly Notices of the Royal Astronomical Society , vol. 521 , no. 1 , pp. 84-98 . https://doi.org/10.1093/mnras/stad487 galaxies: evolution galaxies: kinematics and dynamics galaxies: stellar content article 2023 ftmacquarieunicr https://doi.org/10.1093/mnras/stad487 2024-06-12T23:47:26Z We explore local and global dynamical differences between the kinematics of ionized gas and stars in a sample of galaxies from Data Release 3 of the SAMI Galaxy Survey. We find better agreement between local (i.e. comparing on a spaxel-to-spaxel basis) velocities and dispersion of gas and stars in younger systems as with previous work on the asymmetric drift in galaxies, suggesting that the dynamics of stars and ionized gas are initially coupled. The intrinsic scatter around the velocity and dispersion relations increases with increasing stellar age and mass, suggesting that subsequent mechanisms, such as internal processes, divergent star formation, and assembly histories, also play a role in setting and altering the dynamics of galaxies. The global (flux-weighted) dynamical support of older galaxies is hotter than in younger systems. We find that the ionized gas in galaxies is almost always dynamically colder than the stars with a steeper velocity gradient. In absolute terms, the local difference in velocity dispersion is more pronounced than the local difference in velocity, possibly reflecting inherent differences in the impact of turbulence, inflow and/or feedback on gas compared to stars. We suggest how these findings may be taken into account when comparing high and low redshift galaxy samples to infer dynamical evolution. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 521 1 84 98 |
institution |
Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
topic |
galaxies: evolution galaxies: kinematics and dynamics galaxies: stellar content |
spellingShingle |
galaxies: evolution galaxies: kinematics and dynamics galaxies: stellar content Foster, Caroline Vaughan, Sam Fraser-McKelvie, Amelia Brough, Sarah Bryant, Julia J. Croom, Scott M D’Eugenio, Francesco Groves, Brent Konstantopoulos, Iraklis S. López-Sánchez, Ángel R. Oh, Sree Owers, Matt S. Sweet, Sarah M. van de Sande, Jesse Wisnioski, Emily Yi, Sukyoung K Zovaro, Henry R. M. The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
topic_facet |
galaxies: evolution galaxies: kinematics and dynamics galaxies: stellar content |
description |
We explore local and global dynamical differences between the kinematics of ionized gas and stars in a sample of galaxies from Data Release 3 of the SAMI Galaxy Survey. We find better agreement between local (i.e. comparing on a spaxel-to-spaxel basis) velocities and dispersion of gas and stars in younger systems as with previous work on the asymmetric drift in galaxies, suggesting that the dynamics of stars and ionized gas are initially coupled. The intrinsic scatter around the velocity and dispersion relations increases with increasing stellar age and mass, suggesting that subsequent mechanisms, such as internal processes, divergent star formation, and assembly histories, also play a role in setting and altering the dynamics of galaxies. The global (flux-weighted) dynamical support of older galaxies is hotter than in younger systems. We find that the ionized gas in galaxies is almost always dynamically colder than the stars with a steeper velocity gradient. In absolute terms, the local difference in velocity dispersion is more pronounced than the local difference in velocity, possibly reflecting inherent differences in the impact of turbulence, inflow and/or feedback on gas compared to stars. We suggest how these findings may be taken into account when comparing high and low redshift galaxy samples to infer dynamical evolution. |
format |
Article in Journal/Newspaper |
author |
Foster, Caroline Vaughan, Sam Fraser-McKelvie, Amelia Brough, Sarah Bryant, Julia J. Croom, Scott M D’Eugenio, Francesco Groves, Brent Konstantopoulos, Iraklis S. López-Sánchez, Ángel R. Oh, Sree Owers, Matt S. Sweet, Sarah M. van de Sande, Jesse Wisnioski, Emily Yi, Sukyoung K Zovaro, Henry R. M. |
author_facet |
Foster, Caroline Vaughan, Sam Fraser-McKelvie, Amelia Brough, Sarah Bryant, Julia J. Croom, Scott M D’Eugenio, Francesco Groves, Brent Konstantopoulos, Iraklis S. López-Sánchez, Ángel R. Oh, Sree Owers, Matt S. Sweet, Sarah M. van de Sande, Jesse Wisnioski, Emily Yi, Sukyoung K Zovaro, Henry R. M. |
author_sort |
Foster, Caroline |
title |
The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
title_short |
The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
title_full |
The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
title_fullStr |
The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
title_full_unstemmed |
The SAMI survey:evidence for dynamical coupling of ionized gas and young stellar populations |
title_sort |
sami survey:evidence for dynamical coupling of ionized gas and young stellar populations |
publishDate |
2023 |
url |
https://researchers.mq.edu.au/en/publications/7c385ba9-db3a-465d-bb75-59cb2eb25abb https://doi.org/10.1093/mnras/stad487 http://www.scopus.com/inward/record.url?scp=85150605882&partnerID=8YFLogxK |
genre |
sami |
genre_facet |
sami |
op_source |
Foster , C , Vaughan , S , Fraser-McKelvie , A , Brough , S , Bryant , J J , Croom , S M , D’Eugenio , F , Groves , B , Konstantopoulos , I S , López-Sánchez , Á R , Oh , S , Owers , M S , Sweet , S M , van de Sande , J , Wisnioski , E , Yi , S K & Zovaro , H R M 2023 , ' The SAMI survey : evidence for dynamical coupling of ionized gas and young stellar populations ' , Monthly Notices of the Royal Astronomical Society , vol. 521 , no. 1 , pp. 84-98 . https://doi.org/10.1093/mnras/stad487 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/mnras/stad487 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
521 |
container_issue |
1 |
container_start_page |
84 |
op_container_end_page |
98 |
_version_ |
1802649674526490624 |