Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI
Recent integral field spectroscopy observations have found that about 11% of galaxies show star–gas misalignment. The misalignment possibly results from external effects such as gas accretion, interaction with other objects, and other environmental effects, hence providing clues to these effects. We...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:9f974f0 2023-05-15T18:11:10+02:00 Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI Khim, Donghyeon J. Yi, Sukyoung K. Dubois, Yohan Bryant, Julia J. Pichon, Christophe Croom, Scott M. Bland-Hawthorn, Joss Brough, Sarah Choi, Hoseung Devriendt, Julien Groves, Brent Owers, Matt S. Richards, Samuel N. Sande, Jesse van de Sweet, Sarah M. 2020-05-12 https://espace.library.uq.edu.au/view/UQ:9f974f0 unknown Institute of Physics Publishing doi:10.3847/1538-4357/ab88a9 issn:1538-4357 issn:0004-637X orcid:0000-0002-1576-2505 Space and Planetary Science Astronomy and Astrophysics Journal Article 2020 ftunivqespace https://doi.org/10.3847/1538-4357/ab88a9 2020-10-20T01:09:01Z Recent integral field spectroscopy observations have found that about 11% of galaxies show star–gas misalignment. The misalignment possibly results from external effects such as gas accretion, interaction with other objects, and other environmental effects, hence providing clues to these effects. We explore the properties of misaligned galaxies using Horizon-AGN, a large-volume cosmological simulation, and compare the results with those of the Sydney-AAO Multi-object integral field spectrograph (SAMI) Galaxy Survey. Horizon-AGN can match the overall misalignment fraction and reproduces the distribution of misalignment angles found by observations surprisingly closely. The misalignment fraction is found to be highly correlated with galaxy morphology both in observations and in the simulation: early-type galaxies are substantially more frequently misaligned than late-type galaxies. The gas fraction is another important factor associated with misalignment in the sense that misalignment increases with decreasing gas fraction. However, there is a significant discrepancy between the SAMI and Horizon-AGN data in the misalignment fraction for the galaxies in dense (cluster) environments. We discuss possible origins of misalignment and disagreement. Article in Journal/Newspaper sami The University of Queensland: UQ eSpace The Astrophysical Journal 894 2 106 |
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Open Polar |
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The University of Queensland: UQ eSpace |
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Space and Planetary Science Astronomy and Astrophysics |
spellingShingle |
Space and Planetary Science Astronomy and Astrophysics Khim, Donghyeon J. Yi, Sukyoung K. Dubois, Yohan Bryant, Julia J. Pichon, Christophe Croom, Scott M. Bland-Hawthorn, Joss Brough, Sarah Choi, Hoseung Devriendt, Julien Groves, Brent Owers, Matt S. Richards, Samuel N. Sande, Jesse van de Sweet, Sarah M. Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
Recent integral field spectroscopy observations have found that about 11% of galaxies show star–gas misalignment. The misalignment possibly results from external effects such as gas accretion, interaction with other objects, and other environmental effects, hence providing clues to these effects. We explore the properties of misaligned galaxies using Horizon-AGN, a large-volume cosmological simulation, and compare the results with those of the Sydney-AAO Multi-object integral field spectrograph (SAMI) Galaxy Survey. Horizon-AGN can match the overall misalignment fraction and reproduces the distribution of misalignment angles found by observations surprisingly closely. The misalignment fraction is found to be highly correlated with galaxy morphology both in observations and in the simulation: early-type galaxies are substantially more frequently misaligned than late-type galaxies. The gas fraction is another important factor associated with misalignment in the sense that misalignment increases with decreasing gas fraction. However, there is a significant discrepancy between the SAMI and Horizon-AGN data in the misalignment fraction for the galaxies in dense (cluster) environments. We discuss possible origins of misalignment and disagreement. |
format |
Article in Journal/Newspaper |
author |
Khim, Donghyeon J. Yi, Sukyoung K. Dubois, Yohan Bryant, Julia J. Pichon, Christophe Croom, Scott M. Bland-Hawthorn, Joss Brough, Sarah Choi, Hoseung Devriendt, Julien Groves, Brent Owers, Matt S. Richards, Samuel N. Sande, Jesse van de Sweet, Sarah M. |
author_facet |
Khim, Donghyeon J. Yi, Sukyoung K. Dubois, Yohan Bryant, Julia J. Pichon, Christophe Croom, Scott M. Bland-Hawthorn, Joss Brough, Sarah Choi, Hoseung Devriendt, Julien Groves, Brent Owers, Matt S. Richards, Samuel N. Sande, Jesse van de Sweet, Sarah M. |
author_sort |
Khim, Donghyeon J. |
title |
Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
title_short |
Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
title_full |
Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
title_fullStr |
Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
title_full_unstemmed |
Star–gas misalignment in galaxies. I. The properties of galaxies from the Horizon-AGN simulation and comparisons to SAMI |
title_sort |
star–gas misalignment in galaxies. i. the properties of galaxies from the horizon-agn simulation and comparisons to sami |
publisher |
Institute of Physics Publishing |
publishDate |
2020 |
url |
https://espace.library.uq.edu.au/view/UQ:9f974f0 |
genre |
sami |
genre_facet |
sami |
op_relation |
doi:10.3847/1538-4357/ab88a9 issn:1538-4357 issn:0004-637X orcid:0000-0002-1576-2505 |
op_doi |
https://doi.org/10.3847/1538-4357/ab88a9 |
container_title |
The Astrophysical Journal |
container_volume |
894 |
container_issue |
2 |
container_start_page |
106 |
_version_ |
1766183865905315840 |