The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies
We investigate the energy sources of random turbulent motions of ionized gas from H α emission in eight local star-forming galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These galaxies satisfy strict pure star-forming selection criteria to avoid contamina...
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ftcaltechauth:oai:authors.library.caltech.edu:81446 2023-05-15T18:10:43+02:00 The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies Zhou, Luwenjia Federrath, Christoph Yuan, Tiantian Bian, Fuyan Medling, Anne M. Shi, Yong Bland-Hawthorn, Joss Bryant, Julia J. Brough, Sarah Catinella, Barbara Croom, Scott M. Goodwin, Michael Goldstein, Gregory Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, Jon S. Owers, Matt S. Richards, Samuel N. Sanchez, Sebastian F. 2017-10 application/pdf https://authors.library.caltech.edu/81446/ https://authors.library.caltech.edu/81446/2/Zhou_2017p4573.pdf https://authors.library.caltech.edu/81446/3/1706.04754.pdf https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739 en eng Royal Astronomical Society https://authors.library.caltech.edu/81446/2/Zhou_2017p4573.pdf https://authors.library.caltech.edu/81446/3/1706.04754.pdf Zhou, Luwenjia and Federrath, Christoph and Yuan, Tiantian and Bian, Fuyan and Medling, Anne M. and Shi, Yong and Bland-Hawthorn, Joss and Bryant, Julia J. and Brough, Sarah and Catinella, Barbara and Croom, Scott M. and Goodwin, Michael and Goldstein, Gregory and Green, Andrew W. and Konstantopoulos, Iraklis S. and Lawrence, Jon S. and Owers, Matt S. and Richards, Samuel N. and Sanchez, Sebastian F. (2017) The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 470 (4). pp. 4573-4582. ISSN 0035-8711. doi:10.1093/mnras/stx1504. https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739 <https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739> other Article PeerReviewed 2017 ftcaltechauth https://doi.org/10.1093/mnras/stx1504 2021-11-18T18:43:44Z We investigate the energy sources of random turbulent motions of ionized gas from H α emission in eight local star-forming galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These galaxies satisfy strict pure star-forming selection criteria to avoid contamination from active galactic nuclei (AGNs) or strong shocks/outflows. Using the relatively high spatial and spectral resolution of SAMI, we find that – on sub-kpc scales, our galaxies display a flat distribution of ionized gas velocity dispersion as a function of star formation rate (SFR) surface density. A major fraction of our SAMI galaxies shows higher velocity dispersion than predictions by feedback-driven models, especially at the low SFR surface density end. Our results suggest that additional sources beyond star formation feedback contribute to driving random motions of the interstellar medium in star-forming galaxies. We speculate that gravity, galactic shear and/or magnetorotational instability may be additional driving sources of turbulence in these galaxies. Article in Journal/Newspaper sami Caltech Authors (California Institute of Technology) Monthly Notices of the Royal Astronomical Society 470 4 4573 4582 |
institution |
Open Polar |
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Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
We investigate the energy sources of random turbulent motions of ionized gas from H α emission in eight local star-forming galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These galaxies satisfy strict pure star-forming selection criteria to avoid contamination from active galactic nuclei (AGNs) or strong shocks/outflows. Using the relatively high spatial and spectral resolution of SAMI, we find that – on sub-kpc scales, our galaxies display a flat distribution of ionized gas velocity dispersion as a function of star formation rate (SFR) surface density. A major fraction of our SAMI galaxies shows higher velocity dispersion than predictions by feedback-driven models, especially at the low SFR surface density end. Our results suggest that additional sources beyond star formation feedback contribute to driving random motions of the interstellar medium in star-forming galaxies. We speculate that gravity, galactic shear and/or magnetorotational instability may be additional driving sources of turbulence in these galaxies. |
format |
Article in Journal/Newspaper |
author |
Zhou, Luwenjia Federrath, Christoph Yuan, Tiantian Bian, Fuyan Medling, Anne M. Shi, Yong Bland-Hawthorn, Joss Bryant, Julia J. Brough, Sarah Catinella, Barbara Croom, Scott M. Goodwin, Michael Goldstein, Gregory Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, Jon S. Owers, Matt S. Richards, Samuel N. Sanchez, Sebastian F. |
spellingShingle |
Zhou, Luwenjia Federrath, Christoph Yuan, Tiantian Bian, Fuyan Medling, Anne M. Shi, Yong Bland-Hawthorn, Joss Bryant, Julia J. Brough, Sarah Catinella, Barbara Croom, Scott M. Goodwin, Michael Goldstein, Gregory Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, Jon S. Owers, Matt S. Richards, Samuel N. Sanchez, Sebastian F. The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
author_facet |
Zhou, Luwenjia Federrath, Christoph Yuan, Tiantian Bian, Fuyan Medling, Anne M. Shi, Yong Bland-Hawthorn, Joss Bryant, Julia J. Brough, Sarah Catinella, Barbara Croom, Scott M. Goodwin, Michael Goldstein, Gregory Green, Andrew W. Konstantopoulos, Iraklis S. Lawrence, Jon S. Owers, Matt S. Richards, Samuel N. Sanchez, Sebastian F. |
author_sort |
Zhou, Luwenjia |
title |
The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
title_short |
The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
title_full |
The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
title_fullStr |
The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
title_sort |
sami galaxy survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies |
publisher |
Royal Astronomical Society |
publishDate |
2017 |
url |
https://authors.library.caltech.edu/81446/ https://authors.library.caltech.edu/81446/2/Zhou_2017p4573.pdf https://authors.library.caltech.edu/81446/3/1706.04754.pdf https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://authors.library.caltech.edu/81446/2/Zhou_2017p4573.pdf https://authors.library.caltech.edu/81446/3/1706.04754.pdf Zhou, Luwenjia and Federrath, Christoph and Yuan, Tiantian and Bian, Fuyan and Medling, Anne M. and Shi, Yong and Bland-Hawthorn, Joss and Bryant, Julia J. and Brough, Sarah and Catinella, Barbara and Croom, Scott M. and Goodwin, Michael and Goldstein, Gregory and Green, Andrew W. and Konstantopoulos, Iraklis S. and Lawrence, Jon S. and Owers, Matt S. and Richards, Samuel N. and Sanchez, Sebastian F. (2017) The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 470 (4). pp. 4573-4582. ISSN 0035-8711. doi:10.1093/mnras/stx1504. https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739 <https://resolver.caltech.edu/CaltechAUTHORS:20170914-132934739> |
op_rights |
other |
op_doi |
https://doi.org/10.1093/mnras/stx1504 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
470 |
container_issue |
4 |
container_start_page |
4573 |
op_container_end_page |
4582 |
_version_ |
1766183474654347264 |