| 研究課題/領域番号 |
23K22533
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| 補助金の研究課題番号 |
22H01262 (2022-2023)
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| 研究種目 |
基盤研究(B)
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| 配分区分 | 基金 (2024)
補助金 (2022-2023) |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分16010:天文学関連
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| 研究機関 | 東京大学 |
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研究代表者 |
SILVERMAN John 東京大学, カブリ数物連携宇宙研究機構, 教授 (90573030)
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| 研究分担者 |
泉 拓磨 国立天文台, アルマプロジェクト, 准教授 (40792932)
松岡 良樹 愛媛大学, 宇宙進化研究センター, 准教授 (60547545)
Ding Xuheng 東京大学, カブリ数物連携宇宙研究機構, 特任研究員 (60895986)
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| 研究期間 (年度) |
2022-04-01 – 2025-03-31
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| 研究課題ステータス |
交付 (2024年度)
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| 配分額 *注記 |
17,420千円 (直接経費: 13,400千円、間接経費: 4,020千円)
2024年度: 3,120千円 (直接経費: 2,400千円、間接経費: 720千円)
2023年度: 6,240千円 (直接経費: 4,800千円、間接経費: 1,440千円)
2022年度: 8,060千円 (直接経費: 6,200千円、間接経費: 1,860千円)
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| キーワード | black holes / quasars / near-infrared / galaxies / JWST / supermassive black holes / Hyper Suprime-Cam / Near-infrared / galaxy evolution |
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| 研究開始時の研究の概要 |
We are continuing with the planned research program. The JWST observations for 2 SHELLQS QSOs will be delivered in FY2024 thus competing the full sample of 12 quasars. We will complete the studies on the following: (1) the relation between black hole and galaxy mass, (2) constraints on the black hole mass function and Eddington rate distribution, and (3) stellar populations of quasar host galaxies at z~6. We are finalizing our decomposition of the emission of 104 quasars in COSMOS Web up to z ~ 3 into the separate quasar and host galaxy light.
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| 研究実績の概要 |
We are determining whether the mass ratio between supermassive black holes and their host galaxies is constant out to the early Universe. This is achieved through a James Webb Space Telescope program that targets 12 SHELLQs quasars at z ~ 6 from the HSC Subaru Strategic Program. We are determining the (1) masses of quasar host galaxies, (2) their black hole masses, and (3) the distribution of black hole mass and Eddington rate, all key to understanding the growth of SMBHs. Including a study of SMBHs at later cosmic times with COSMOS-Web, a large JWST imaging survey, we are constructing a full picture of the growth of galaxies and their black holes. In FY 2023, we published in Nature the results on the first two host detections and stellar mass estimates.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
In FY 2023, we have received and analyzed the JWST data (NIRCam and NIRSpec) for an additional eight (10 of 12 in total) SHELLQs quasars at z ~ 6 which have been processed for science-grade measurements. With this larger sample, we significantly detect the host galaxies for seven targets and the broad emission lines with NIRSpec which provide black hole masses. We are actively working on the analysis of the full sample and preparing publications. In addition, we have successfully analyzed 104 AGN in the COSMOS-Web NIRCam survey by running our 2D image decomposition tool which results in a robust measure of the ratio between black holes mass and the stellar mass of their host galaxies out to z~3. This work has been submitted to the Astrophysical Journal for publication.
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| 今後の研究の推進方策 |
We are continuing with the planned research program. We will complete the studies on the following: (1) the relation between black hole and galaxy mass, (2) constraints on the black hole mass function and Eddington rate distribution, (3) stellar populations of quasar host galaxies at z~6 and (4) the importance of gas content in the early Universe. We are finalizing our decomposition of 104 quasars up to z ~ 3 into separate quasar and host galaxy light with COSMOS-Web. Follow up proposals to JWST and ALMA will be submitted to study in detail their stellar populations, gas content and large-scale environments. Coupled with the Hyper Suprime-Cam Subaru Strategic Survey, we will present a comprehensive picture of black hole and galaxy growth using the SHELLQs and COSMOS-Web programs.
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