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Predicting the formation of stars, black holes, and gravitational-wave signals with young galaxy clusters

Research Project

Project/Area Number 21K13911
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionThe University of Tokyo

Principal Investigator

Ata Metin  東京大学, カブリ数物連携宇宙研究機構, 客員准科学研究員 (60836229)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsLarge-scale structure / Gravitational waves / Large-scale structures / Cosmological Simulations / Gravitational Waves / Balck holes / High redshift galaxies / Binary black holes / Constrained simulations / Young galaxy clusters
Outline of Research at the Start

As a first step I will run constrained simulations of young galaxy clusters of which I reconstructed the initial conditions in a previous work. The idea is to first use dark matter simulations to show that we can predict the further evolution of these clusters. Once this first project is successfully finished, we will go ahead and run hydrodynamical simulations. These simulations will incorporate star formation models that we will use to predict the formation of binary black holes and gravitational wave. With this work we can improve the physics of star formation by comparing to observations.

Outline of Final Research Achievements

I initially designed this project to utilize high redshift density reconstructions that I was working on at the moment. The idea of using density maps located in the era of maximum star formation is motivated as merging stellar remnants such as neutron stars and black holes, are the astrophysical sources of gravitational waves.
I was able to accomplish to close the gap of observational studies and cosmological simulations, however, I had to restructure the project in a general way. The initial idea to resolve stellar size that lie in the LIGA-VIRGO-KARGA frequency band turned out to be unfeasible. Therefore, I switched the focus to the Stochastic gravitational wave background in the nano-hertz band that is sourced by merging super-massive blackholes. These objects can very accurately be resolved in large-scale cosmological simulations, which makes this project an ideal use-case for the new density maps that I am creating now.

Academic Significance and Societal Importance of the Research Achievements

The confirmation of the stochastic gravitational wave background by the NANOGrav collaboration last year boosted the significance of this project massively, especially our unique ability to estimate the anisotropies in the stochastic background.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2022 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Stockholm University(スウェーデン)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Astrophysical Institute of the Canaries(スペイン)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of California(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Osservatorio di Astrofisica e Scienza(イタリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Max Planck Institute for Astronomy,(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Predicted future fate of COSMOS galaxy protoclusters over 11 Gyr with constrained simulations2022

    • Author(s)
      Ata Metin、Lee Khee-Gan、Vecchia Claudio Dalla、Kitaura Francisco-Shu、Cucciati Olga、Lemaux Brian C.、Kashino Daichi、Muller Thomas
    • Journal Title

      Nature Astronomy

      Volume: 6 Issue: 7 Pages: 857-865

    • DOI

      10.1038/s41550-022-01693-0

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Constraining the Cosmic Baryon Distribution with Fast Radio Burst Foreground Mapping2022

    • Author(s)
      Lee Khee-Gan、Ata Metin、Khrykin Ilya S.、Huang Yuxin、Prochaska J. Xavier、Cooke Jeff、Zhang Jielai、Batten Adam
    • Journal Title

      The Astrophysical Journal

      Volume: 928 Issue: 1 Pages: 9-9

    • DOI

      10.3847/1538-4357/ac4f62

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Future Fate of COSMOS Galaxy Protoclusters over 11 Gyrs with Constrained Simulations2022

    • Author(s)
      Metin Ata, Khee-Gan Lee , Claudio Dalla Vecchia , Francisco-Shu Kitaura , Olga Cucciati , Brian Lemaux , Daichi Kashino , Thomas Muller
    • Journal Title

      Nature Astronomy

      Volume: ---

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Remarks] Aquila Consortium

    • URL

      https://www.aquila-consortium.org/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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