2014 Fiscal Year Final Research Report
Investigating Disk Galaxy Formation Through ALMA Observations of Merger Remnants
| Project/Area Number |
25800116
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
IONO Daisuke 国立天文台, チリ観測所, 准教授 (60425402)
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| Research Collaborator |
UEDA Junko 国立天文台, チリ観測所, 特任研究員 (60749935)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 銀河形成 / 電波天文学 / 銀河衝突 / 分子ガス観測 / 銀河進化 |
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| Outline of Final Research Achievements |
The standard galaxy formation model predicts that galaxy collisions and mergers play an important role in the formation and evolution of disk galaxies. However, this process has not been proved observationally. Here we use the ALMA telescope to investigate whether galaxy collisions can lead to the formation of large disk galaxies.
We detected molecular gas emission from 30 galaxies out of the 37 galaxies that we have observed. Out of the 30 galaxies, 24 of them were found to posses rotating molecular gas disks. The size of the disks in a few of the galaxies were in fact comparable to the size of our own Milky Way galaxy. From this study, we suggest the possibility that galaxy collisions can indeed produce large rotating disk galaxies in the local universe.
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| Free Research Field |
電波天文学
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