| Project/Area Number |
18K13587
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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 | National Astronomical Observatory of Japan |
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Principal Investigator |
Miura Rie 国立天文台, アルマプロジェクト, 特別客員研究員 (30770698)
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| Project Period (FY) |
2019-02-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 大質量星形成 / 星形成率 / 近傍銀河 / サブミリ波 / ミリ波サブミリ波 / ALMA / 電波連続波 / 水素再結合線 |
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| Outline of Final Research Achievements |
In this study, we investigated the usefulness of analyzing 100 GHz band continuum data using the ALMA telescope for accurately determining the star formation rate. We identified 16 continuum sources from 87 giant molecular clouds in the M33 galaxy and estimated the star formation rate based on those sources. Additionally, we created a more objective photometric catalog of stars in the northern and southern spiral arm of the M33 galaxy using a machine learning algorithm by applying it on the near-infrared images from the Subaru Telescope. As a result, we observed for the first time that the star formation rate estimated from the 100 GHz band continuum was almost equally accurate when compared spatially and quantitatively to those obtained from the photometric catalog of massive young star objects.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、従来の星形成率測定方法における欠点を克服し、最先端電波望遠鏡ALMAを用いた新しい星形成率測定方法の有用性を実証した。これにより、銀河進化を理解する上で重要な要素である星形成率をより正確により複雑なプロセスを経ることなく測定することができるようになる。本研究で検証された手法は、減光などの理由で他の波長のデータでは困難である領域でも使える手法であり、遠方宇宙にも容易にスケールアップすることができる。
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