The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies
We use the complete Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to determine the contribution of slow rotators, as well as different types of fast rotators, to the stellar mass function of galaxies in the local Universe. We use stellar kinematics not only to discriminate...
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ftdatacite:10.48550/arxiv.1911.01433 2023-05-15T18:11:44+02:00 The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies Guo, Kexin Cortese, Luca Obreschkow, Danail Catinella, Barbara van de Sande, Jesse Croom, Scott M. Brough, Sarah Sweet, Sarah Bryant, Julia J. Medling, Anne Bland-Hawthorn, Joss Owers, Matt Richards, Samuel N. 2019 https://dx.doi.org/10.48550/arxiv.1911.01433 https://arxiv.org/abs/1911.01433 unknown arXiv https://dx.doi.org/10.1093/mnras/stz3042 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 2019 ftdatacite https://doi.org/10.48550/arxiv.1911.01433 https://doi.org/10.1093/mnras/stz3042 2022-03-10T16:15:10Z We use the complete Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to determine the contribution of slow rotators, as well as different types of fast rotators, to the stellar mass function of galaxies in the local Universe. We use stellar kinematics not only to discriminate between fast and slow rotators, but also to distinguish between dynamically cold systems (i.e., consistent with intrinsic axis ratios$<0.3$) and systems including a prominent dispersion-supported bulge. We show that fast rotators account for more than $80\%$ of the stellar mass budget of nearby galaxies, confirming that their number density overwhelms that of slow rotators at almost all masses from $10^{9}$ to $10^{11.5}{\rm M_\odot}$. Most importantly, dynamically cold disks contribute to at least $25\%$ of the stellar mass budget of the local Universe, significantly higher than what is estimated from visual morphology alone. For stellar masses up to $10^{10.5}{\rm M_\odot}$, this class makes up $>=30\%$ of the galaxy population in each stellar mass bin. The fact that many galaxies that are visually classified as having two-components have stellar spin consistent with dynamically cold disks suggests that the inner component is either rotationally-dominated (e.g., bar, pseudo-bulge) or has little effect on the global stellar kinematics of galaxies. : 11pages, 6 figures, accepted for publication in 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) |
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Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
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Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Guo, Kexin Cortese, Luca Obreschkow, Danail Catinella, Barbara van de Sande, Jesse Croom, Scott M. Brough, Sarah Sweet, Sarah Bryant, Julia J. Medling, Anne Bland-Hawthorn, Joss Owers, Matt Richards, Samuel N. The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We use the complete Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey to determine the contribution of slow rotators, as well as different types of fast rotators, to the stellar mass function of galaxies in the local Universe. We use stellar kinematics not only to discriminate between fast and slow rotators, but also to distinguish between dynamically cold systems (i.e., consistent with intrinsic axis ratios$<0.3$) and systems including a prominent dispersion-supported bulge. We show that fast rotators account for more than $80\%$ of the stellar mass budget of nearby galaxies, confirming that their number density overwhelms that of slow rotators at almost all masses from $10^{9}$ to $10^{11.5}{\rm M_\odot}$. Most importantly, dynamically cold disks contribute to at least $25\%$ of the stellar mass budget of the local Universe, significantly higher than what is estimated from visual morphology alone. For stellar masses up to $10^{10.5}{\rm M_\odot}$, this class makes up $>=30\%$ of the galaxy population in each stellar mass bin. The fact that many galaxies that are visually classified as having two-components have stellar spin consistent with dynamically cold disks suggests that the inner component is either rotationally-dominated (e.g., bar, pseudo-bulge) or has little effect on the global stellar kinematics of galaxies. : 11pages, 6 figures, accepted for publication in MNRAS |
format |
Article in Journal/Newspaper |
author |
Guo, Kexin Cortese, Luca Obreschkow, Danail Catinella, Barbara van de Sande, Jesse Croom, Scott M. Brough, Sarah Sweet, Sarah Bryant, Julia J. Medling, Anne Bland-Hawthorn, Joss Owers, Matt Richards, Samuel N. |
author_facet |
Guo, Kexin Cortese, Luca Obreschkow, Danail Catinella, Barbara van de Sande, Jesse Croom, Scott M. Brough, Sarah Sweet, Sarah Bryant, Julia J. Medling, Anne Bland-Hawthorn, Joss Owers, Matt Richards, Samuel N. |
author_sort |
Guo, Kexin |
title |
The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
title_short |
The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
title_full |
The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
title_fullStr |
The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
title_full_unstemmed |
The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies |
title_sort |
sami galaxy survey: the contribution of different kinematic classes to the stellar mass function of nearby galaxies |
publisher |
arXiv |
publishDate |
2019 |
url |
https://dx.doi.org/10.48550/arxiv.1911.01433 https://arxiv.org/abs/1911.01433 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/stz3042 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1911.01433 https://doi.org/10.1093/mnras/stz3042 |
_version_ |
1766184370145591296 |