The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence
We infer the intrinsic ionised gas kinematics for 383 star-forming galaxies across a range of integrated star-formation rates (SFR $\in [10^{-3}, 10^2]$ M$_\odot$ yr$^{-1}$) at $z \lesssim 0.1$ using a consistent 3D forward-modelling technique. The total sample is a combination of galaxies from the...
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ftdatacite:10.48550/arxiv.2005.04874 2023-05-15T18:11:17+02:00 The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence Varidel, Mathew R. Croom, Scott M. Lewis, Geraint F. Fisher, Deanne B. Glazebrook, Karl Catinella, Barbara Cortese, Luca Krumholz, Mark R. Bland-Hawthorn, Joss Bryant, Julia J. Groves, Brent Brough, Sarah Federrath, Christoph Lawrence, Jon S. Lorente, Nuria P. Owers, Matt S. Richards, Samuel N. López-Sánchez, Ángel R. Sweet, Sarah M. van de Sande, Jesse Vaughan, Sam P. 2020 https://dx.doi.org/10.48550/arxiv.2005.04874 https://arxiv.org/abs/2005.04874 unknown arXiv https://dx.doi.org/10.1093/mnras/staa1272 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2005.04874 https://doi.org/10.1093/mnras/staa1272 2022-03-10T15:43:30Z We infer the intrinsic ionised gas kinematics for 383 star-forming galaxies across a range of integrated star-formation rates (SFR $\in [10^{-3}, 10^2]$ M$_\odot$ yr$^{-1}$) at $z \lesssim 0.1$ using a consistent 3D forward-modelling technique. The total sample is a combination of galaxies from the SAMI Galaxy Survey and DYNAMO survey. For typical low-$z$ galaxies taken from the SAMI Galaxy Survey, we find the vertical velocity dispersion ($σ_{v, z}$) to be positively correlated with measures of star-formation rate, stellar mass, HI gas mass, and rotational velocity. The greatest correlation is with star-formation rate surface density ($Σ_\text{SFR}$). Using the total sample, we find $σ_{v, z}$ increases slowly as a function of integrated star-formation rate in the range SFR $\in$ [$10^{-3}$, 1] M$_\odot$ yr$^{-1}$ from $17\pm3$ km s$^{-1}$ to $24\pm5$ km s$^{-1}$ followed by a steeper increase up to $σ_{v, z}$ $\sim 80$ km s$^{-1}$ for SFR $\gtrsim 1$ M$_\odot$ yr$^{-1}$. This is consistent with recent theoretical models that suggest a $σ_{v, z}$ floor driven by star-formation feedback processes with an upturn in $σ_{v, z}$ at higher SFR driven by gravitational transport of gas through the disc. : 27 pages, 10 figures, accepted for MNRAS Article in Journal/Newspaper sami DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
spellingShingle |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Varidel, Mathew R. Croom, Scott M. Lewis, Geraint F. Fisher, Deanne B. Glazebrook, Karl Catinella, Barbara Cortese, Luca Krumholz, Mark R. Bland-Hawthorn, Joss Bryant, Julia J. Groves, Brent Brough, Sarah Federrath, Christoph Lawrence, Jon S. Lorente, Nuria P. Owers, Matt S. Richards, Samuel N. López-Sánchez, Ángel R. Sweet, Sarah M. van de Sande, Jesse Vaughan, Sam P. The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We infer the intrinsic ionised gas kinematics for 383 star-forming galaxies across a range of integrated star-formation rates (SFR $\in [10^{-3}, 10^2]$ M$_\odot$ yr$^{-1}$) at $z \lesssim 0.1$ using a consistent 3D forward-modelling technique. The total sample is a combination of galaxies from the SAMI Galaxy Survey and DYNAMO survey. For typical low-$z$ galaxies taken from the SAMI Galaxy Survey, we find the vertical velocity dispersion ($σ_{v, z}$) to be positively correlated with measures of star-formation rate, stellar mass, HI gas mass, and rotational velocity. The greatest correlation is with star-formation rate surface density ($Σ_\text{SFR}$). Using the total sample, we find $σ_{v, z}$ increases slowly as a function of integrated star-formation rate in the range SFR $\in$ [$10^{-3}$, 1] M$_\odot$ yr$^{-1}$ from $17\pm3$ km s$^{-1}$ to $24\pm5$ km s$^{-1}$ followed by a steeper increase up to $σ_{v, z}$ $\sim 80$ km s$^{-1}$ for SFR $\gtrsim 1$ M$_\odot$ yr$^{-1}$. This is consistent with recent theoretical models that suggest a $σ_{v, z}$ floor driven by star-formation feedback processes with an upturn in $σ_{v, z}$ at higher SFR driven by gravitational transport of gas through the disc. : 27 pages, 10 figures, accepted for MNRAS |
format |
Article in Journal/Newspaper |
author |
Varidel, Mathew R. Croom, Scott M. Lewis, Geraint F. Fisher, Deanne B. Glazebrook, Karl Catinella, Barbara Cortese, Luca Krumholz, Mark R. Bland-Hawthorn, Joss Bryant, Julia J. Groves, Brent Brough, Sarah Federrath, Christoph Lawrence, Jon S. Lorente, Nuria P. Owers, Matt S. Richards, Samuel N. López-Sánchez, Ángel R. Sweet, Sarah M. van de Sande, Jesse Vaughan, Sam P. |
author_facet |
Varidel, Mathew R. Croom, Scott M. Lewis, Geraint F. Fisher, Deanne B. Glazebrook, Karl Catinella, Barbara Cortese, Luca Krumholz, Mark R. Bland-Hawthorn, Joss Bryant, Julia J. Groves, Brent Brough, Sarah Federrath, Christoph Lawrence, Jon S. Lorente, Nuria P. Owers, Matt S. Richards, Samuel N. López-Sánchez, Ángel R. Sweet, Sarah M. van de Sande, Jesse Vaughan, Sam P. |
author_sort |
Varidel, Mathew R. |
title |
The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
title_short |
The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
title_full |
The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
title_fullStr |
The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
title_full_unstemmed |
The SAMI Galaxy Survey: Gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
title_sort |
sami galaxy survey: gas velocity dispersions in low-$z$ star-forming galaxies and the drivers of turbulence |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2005.04874 https://arxiv.org/abs/2005.04874 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/staa1272 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2005.04874 https://doi.org/10.1093/mnras/staa1272 |
_version_ |
1766183966496260096 |