Star formation in galaxies in the violent epoch of galaxy evolution
| Project/Area Number |
16K05294
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Kyoto University |
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Principal Investigator |
Ohta Kouji 京都大学, 理学研究科, 教授 (50221825)
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| Research Collaborator |
Seko Akifumi
Maeda Fumiya
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 銀河 / 銀河進化 / 星形成 / 電波天文学 / 光赤外線天文学 |
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| Outline of Final Research Achievements |
How do galaxies convert gas into stars and form structure of galaxies? What is the condition for the star formation in galaxies? We studied these questions with respect to the molecular gas in galaxies. We revealed nature of the molecular gas clumps in a 'molecular clumpy galaxy', which may be in an evolutionary stage of a disk galaxy in the epoch of violent evolution of galaxies. We also found new insights for the cause for the very inefficient star formation in the present-day galaxies. The insights would be useful to understand the over production of stars in high redshift universe theoretically faced problem.
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| Academic Significance and Societal Importance of the Research Achievements |
銀河とは、宇宙の中でガスを星に転換していくシステムであると捉えることができる。従って、銀河内でどのように星が形成されていくのかを明らかにすることが重要である。本研究では、今から約90億年前に円盤銀河がどのように形成されたかの一端を見ることができた点、星生成の母胎である分子ガスがあっても星ができない原因の可能性を見出したという点で、意義があると考えられる。宇宙の成り立ちを知ることは最終的には人類の世界観に寄与すると考えられ、社会的にも意義はあるものと考えられる。
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Report
(4 results)
Research Products
(30 results)
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[Journal Article] Extremely Red Submillimeter Galaxies: New z>4-6 Candidates Discovered using ALMA and Jansky VLA2017
Author(s)
Ikarashi S., Ivison R. J., Caputi K. I., Nakanishi K., Lagos C. D. P., Ashby M. L. N., Aretxaga I., Dunlop J. S., Hatsukade B., Hughes D. H., Iono D., Izumi T., Kawabe R., Kohno K., Motohara K., et al.
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Journal Title
The Astrophysical Journal
Volume: 835
Issue: 2
Pages: 286-286
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Gas-to-dust ratios in massive star-forming galaxies at z~1.42016
Author(s)
Seko, A., Ohta, K., Yabe, K., Hatsukade, B., Aono, Y., and Iono, D.
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Journal Title
Publication of Astronomical Society of Japan
Volume: 68(4)
Issue: 4
Pages: 62-62
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] SXDF-ALMA 2-arcmin^2 deep survey: 1.1-mm number counts2016
Author(s)
Hatsukade B., Kohno K., Umehata H., Aretxaga I., Caputi K. I., Dunlop J. S., Ikarashi S., Iono D., Ivison R. J., Lee M., Makiya R., Matsuda Y., Motohara K., Nakanishi K., Ohta K., Tadaki K.-i., Tamura Y., Wang W.-H., Wilson G. W., Yamaguchi Y., Yun M. S.
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Journal Title
Publications of the Astronomical Society of Japan
Volume: 68
Issue: 3
Pages: 36-36
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Constraint on the inflow/outflow rates in star-forming galaxies at z~1.4 from molecular gas observations2016
Author(s)
Seko, A., Ohta, K., Yabe, K., Hatsukade, B., Akiyama, M., Tamura, N., Iwamuro, F., and Dalton, G.
Organizer
The galaxy life-cycle : From activity to quiescence, and back, across cosmic times
Place of Presentation
ベニス(イタリア）
Year and Date
2016-10-24
Related Report
Int'l Joint Research
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[Book] 銀河Ⅰ 第２版2018
Author(s)
谷口義明、岡村定矩、祖父江義明他
Total Pages
384
Publisher
日本評論社
ISBN
9784535607545
Related Report
