Nature Astronomy
Multiple gas acquisition events in galaxies with dual misaligned gas disks
Cao Xiao
1, 2, 3
,
Chen Yan Mei
1, 2, 3
,
Shi Yong
1, 2, 3
,
Bao Min
1, 2, 3, 4
,
Moiseev Alexei
5, 6
,
Bizyaev Dmitry
6, 7
,
Li Song-Lin
1, 2, 3
,
Riffel Rogemar A.
9, 10
,
Riffel Rogerio
10, 11
,
2
Collaborative Innovation Center of Modern Astronomy and Space Exploration, Nanjing, China
|
7
Apache Point Observatory and New Mexico State University, Sunspot, USA
|
8
Instituto de Astronomía, Universidad Católica Del Norte, Antofagasta, Chile
|
9
Departamento de Física, CCNE, Universidade Federal de Santa Maria, Santa Maria, Brazil
|
10
Laboratório Interinstitucional de e-Astronomia - LIneA, Rio de Janeiro, Brazil
|
11
Departamento de Astronomia, Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
|
12
Centro de Investigación en Astronomía, Universidad Bernardo O’Higgins, Santiago, Chile
|
Publication type: Journal Article
Publication date: 2022-09-29
Astronomy and Astrophysics
Abstract
Frequent accretion of external cold gas is thought to play an important role in galaxy assembly. However, almost all known kinematically misaligned galaxies identify only one gas disk that is misaligned with the stellar disk, implying a single gas acquisition event. Here we report a new configuration in two galaxies where both contain two gas disks misaligned with each other and also with the stellar disk. Such systems are not expected to be stable or long-lasting, challenging the traditional picture of gas accretion of galaxies and their angular momentum build-up. The differences in kinematic position angles are larger than 120° between the two gas disks, and 40° between each gas disk and the stellar component. The star formation activity is enhanced at the interface of the two gas disks compared with the other regions within the same galaxy. Such systems illustrate that low-redshift galaxies can still experience multiple gas acquisition events, and provide a new view into the origins of galactic gas.
Citations by journals
1
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Astrophysical Journal Letters
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Astrophysical Journal Letters
1 publication, 50%
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Monthly Notices of the Royal Astronomical Society
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Monthly Notices of the Royal Astronomical Society
1 publication, 50%
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1
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Citations by publishers
1
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American Astronomical Society
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American Astronomical Society
1 publication, 50%
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Oxford University Press
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Oxford University Press
1 publication, 50%
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1
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Cao X. et al. Multiple gas acquisition events in galaxies with dual misaligned gas disks // Nature Astronomy. 2022.
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Cao X., Chen Y. M., Shi Y., Bao M., Moiseev A., Bizyaev D., Li S., Fernández-Trincado J. G., Riffel R. A., Riffel R., Lane R. R. Multiple gas acquisition events in galaxies with dual misaligned gas disks // Nature Astronomy. 2022.
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TY - JOUR
DO - 10.1038/s41550-022-01788-8
UR - https://doi.org/10.1038%2Fs41550-022-01788-8
TI - Multiple gas acquisition events in galaxies with dual misaligned gas disks
T2 - Nature Astronomy
AU - Cao, Xiao
AU - Chen, Yan Mei
AU - Bao, Min
AU - Moiseev, Alexei
AU - Bizyaev, Dmitry
AU - Li, Song-Lin
AU - Fernández-Trincado, José G.
AU - Riffel, Rogemar A.
AU - Riffel, Rogerio
AU - Lane, Richard R.
AU - Shi, Yong
PY - 2022
DA - 2022/09/29 00:00:00
PB - Springer Nature
SN - 2397-3366
ER -
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@article{2022_Cao
author = {Xiao Cao and Yan Mei Chen and Min Bao and Alexei Moiseev and Dmitry Bizyaev and Song-Lin Li and José G. Fernández-Trincado and Rogemar A. Riffel and Rogerio Riffel and Richard R. Lane and Yong Shi},
title = {Multiple gas acquisition events in galaxies with dual misaligned gas disks},
journal = {Nature Astronomy},
year = {2022},
publisher = {Springer Nature},
month = {sep},
url = {https://doi.org/10.1038%2Fs41550-022-01788-8},
doi = {10.1038/s41550-022-01788-8}
}