The SAMI Galaxy Survey: The contribution of different kinematic classes to the stellar mass function of nearby galaxies
Abstract 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 dis...
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Online Access: | http://dx.doi.org/10.1093/mnras/stz3042 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz3042/30338284/stz3042.pdf |
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croxfordunivpr:10.1093/mnras/stz3042 2023-05-15T18:11:40+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 http://dx.doi.org/10.1093/mnras/stz3042 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz3042/30338284/stz3042.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Monthly Notices of the Royal Astronomical Society ISSN 0035-8711 1365-2966 Space and Planetary Science Astronomy and Astrophysics journal-article 2019 croxfordunivpr https://doi.org/10.1093/mnras/stz3042 2022-10-07T09:35:45Z Abstract 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 109 to 1011.5M⊙. 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 1010.5M⊙, 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. Article in Journal/Newspaper sami Oxford University Press (via Crossref) Monthly Notices of the Royal Astronomical Society |
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English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
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Space and Planetary Science Astronomy and Astrophysics 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 |
Space and Planetary Science Astronomy and Astrophysics |
description |
Abstract 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 109 to 1011.5M⊙. 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 1010.5M⊙, 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. |
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 |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/mnras/stz3042 http://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stz3042/30338284/stz3042.pdf |
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sami |
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sami |
op_source |
Monthly Notices of the Royal Astronomical Society ISSN 0035-8711 1365-2966 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/mnras/stz3042 |
container_title |
Monthly Notices of the Royal Astronomical Society |
_version_ |
1766184313656705024 |