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Formation and Evolution of Supermassive Black Holes Probed by High-Redshift Active Galactic Nuclei

Research Project

Project/Area Number 23KJ0589
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeMulti-year Fund
Section国内
Review Section Basic Section 16010:Astronomy-related
Research InstitutionNational Astronomical Observatory of Japan

Principal Investigator

ZHANG Yechi  国立天文台, 科学研究部, 特別研究員(PD)

Project Period (FY) 2023-04-25 – 2025-03-31
Project Status Discontinued (Fiscal Year 2023)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2024: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2023: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordsgalaxy formation / galaxy evolution / supermassive black holes / active galactic nuclei
Outline of Research at the Start

This study will focus on the evolution of black holes (BHs) and their coevolution with host galaxies in the early stage of their formation. Utilizing the faint active galactic nuclei sample obtained with untargeted spectroscopic surveys, two scientific goals will be achieved: a) investigating the mass ratio of BHs and host galaxies at the BH mass range of 10^7 solar masses that will reveal the evolution path of BH an host galaxies, b) identifying the intermediate mass BHs with 10^5-10^6 solar masses that are likely to be the building blocks of supermassive BHs in the early universe.

Outline of Annual Research Achievements

Throughout the first year of the project, two main topics have been investigated: a) the co-evolution of the supermassive black holes (SMBH) and their host galaxies, b) potential outflow activities in high-redshift galaxies that may affect both SMBH and galaxy growth.
The SMBH-galaxy co-evolution has been investigated through z=2 to z=7. At z=2-3, the low mass end of the stellar mass (M_*) - black hole mass (M_BH) relation has been studied with the untargeted integral field spectroscopic (IFS) survey of Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). The results, which were published in Zhang et al. 2023, ApJ, 948, 103, show that SMBHs with M_BH=10^7-10^9 M_sun at z=2 grow more efficiently than their local counterparts. A Subaru proposal has been submitted for further investigations on these systems. At z=4-7, similar results have been analyzed and obtained in a sample of 10 type 1 active galactic nuclei (AGNs) from the James Webb Space Telescope (JWST) data (Harikane et al. 2023, ApJ, 959, 39), indicating the early growth of SMBHs.
The outflow in high-redshift galaxies has been investigated with the James Webb Space Telescope (JWST) data. The results show that outflows in z=6-9 galaxies are likely to be more related to periodic star-forming histories rather than feedback from SMBHs. The paper has been accepted for publication in ApJ. Further investigation is under way.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

Based on data from JWST, active galactic nuclei (AGNs) at z=4-7 has been identified and investigated. At z=2-3, the study on the co-evolution of SMBHs and galaxies is progressing as planned.

Strategy for Future Research Activity

Future studies will focus on the detection of a larger number of AGNs, including the dust-obscured ones, at z>4. At z=2-3, a Subaru Prime Focus Spectrogragh (PFS) proposal is in preparation to precisely measure the black hole masses of faint AGNs. These results will provide insights into the co-evolution of SMBHs and galaxies in the early epoch.

Report

(1 results)
  • 2023 Research-status Report
  • Research Products

    (7 results)

All 2024 2023 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Open Access: 3 results,  Peer Reviewed: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] University of Texas at Austin/Pennsylvania State University(米国)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] MPE(ドイツ)

    • Related Report
      2023 Research-status Report
  • [Journal Article] Statistics for Galaxy Outflows at z~6-9 Identified with Imaging and Spectroscopic Signatures Identified with JWST/NIRCam and NIRSpec Data2023

    • Author(s)
      Y. Zhang, M. Ouchi, N. Kimihiko, Y. Harikane, Y. Isobe, Y. Xu, Y. Ono, H. Umeda
    • Journal Title

      arXiv eprint

      Volume: /

    • Related Report
      2023 Research-status Report
    • Open Access
  • [Journal Article] A JWST/NIRSpec First Census of Broad-line AGNs at z = 4-7: Detection of 10 Faint AGNs with M_BH~10^6-10^8 M_sun and Their Host Galaxy Properties2023

    • Author(s)
      Harikane Yuichi、Zhang Yechi、Nakajima Kimihiko、Ouchi Masami、Isobe Yuki、Ono Yoshiaki、Hatano Shun、Xu Yi、Umeda Hiroya
    • Journal Title

      The Astrophysical Journal

      Volume: 959 Issue: 1 Pages: 39-39

    • DOI

      10.3847/1538-4357/ad029e

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Stellar Mass - Black Hole Mass Relation at z~2 down to M_BH~10^7M_sun Determined by HETDEX2023

    • Author(s)
      Zhang Yechi、Ouchi Masami、Gebhardt Karl、Liu Chenxu、Harikane Yuichi、Cooper Erin Mentuch、Davis Dustin、Farrow Daniel J.、Gawiser Eric、Hill Gary J.、Kollatschny Wolfram、Ono Yoshiaki、Schneider Donald P.、Finkelstein Steven L.、Gronwall Caryl、Jogee Shardha、Krumpe Mirko
    • Journal Title

      The Astrophysical Journal

      Volume: 948 Issue: 2 Pages: 103-103

    • DOI

      10.3847/1538-4357/acc2c2

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Unveiling the formation and evolution of SMBHs with PFS and HETDEX2024

    • Author(s)
      Y. Zhang
    • Organizer
      2024 Spring Annual Meeting of Astronomical Society of Japan
    • Related Report
      2023 Research-status Report
  • [Presentation] Statistics for Galaxy Outflows at z~6-9 Identified with NIRCam and NIRSpec2023

    • Author(s)
      Y. Zhang
    • Organizer
      The First Year of JWST Science Conference
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research

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Published: 2023-04-26   Modified: 2024-12-25  

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