2022 Fiscal Year Final Research Report
The environmental dependance of galaxy/BH growth studied with Subaru and infrared archival data
| Project/Area Number |
20K14530
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 16010:Astronomy-related
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| Research Institution | Tohoku University (2022)
Ehime University (2020-2021) |
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Principal Investigator |
Mariko Kubo 東北大学, 理学研究科, 助教 (40743216)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 銀河形成進化 |
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| Outline of Final Research Achievements |
We showed the dramatic evolution of galaxies in protoclusters based on wide and deep imaging surveys and detailed observations of individual protoclusters. The average infrared emission from a protocluster at z < 6 was constrained using the catalog of radio galaxies and QSOs selected using the Subaru telescope and infrared archival data from WISE and Planck. It shows a significant obscured star formation and BH growths in protoclusters across cosmic time statistically. The most distant giant elliptical and a giant elliptical with active galactic nuclei, which likely quench star formation, in a protocluster (z ~ 3) were confirmed.
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| Free Research Field |
銀河形成進化
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| Academic Significance and Societal Importance of the Research Achievements |
本研究ではアーカイブデータを用いて原始銀河団中遠赤外線放射の大規模調査を行い、その隠れた銀河形成・ブラックホール降着率の進化を初めて統計的に解明した。先行研究では精度が低かった中間赤外線解析も高精度化し、現在稼働中のどの望遠鏡にも困難な中遠赤外線の目となる手法を実証したことは、今後の遠方銀河研究において高い意義を持つ。2023年に打ち上げが予定されるユークリッド望遠鏡やルービン天文台、ローマン宇宙望遠鏡で得られる銀河団原始銀河団カタログにより、より多様な銀河環境について統計的研究を展開することが期待できる。
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