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Observational Constraint on the Structure Formation of the Universe Revealed by Subaru Telescope

Research Project

Project/Area Number 17H07325
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Astronomy
Research InstitutionNational Astronomical Observatory of Japan (2018)
Kindai University (2017)

Principal Investigator

Ishikawa Shogo  国立天文台, 天文シミュレーションプロジェクト, 特任研究員 (40807385)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords観測的宇宙論 / ダークマター / ダークエネルギー / 銀河のクラスタリング / バリオン音響振動 / 宇宙の大規模構造 / すばる望遠鏡 / 宇宙物理学 / 天文学
Outline of Final Research Achievements

The large-scale structure of the Universe is thought to grow from density fluctuations with quantum scale by the rapid expansion of the Universe; however, properties of dark energy, which is thought to be the energy source of the expansion of the Universe, are rarely revealed. Another component of dark sector, dark matter, also plays an important role in galaxy formation and evolution. In this study, we reveal the co-evolution of galaxies and dark matter haloes and put observational constraints on dark energy by carrying out precise clustering analyses using the largest-ever galaxy catalogue obtained by Subaru Telescope Hyper Suprime-Cam.

Academic Significance and Societal Importance of the Research Achievements

本研究は現在の宇宙の大部分を占めながらも正体不明である宇宙の暗黒成分に対してすばる望遠鏡による観測を通してその物理的性質を明らかにし、そこから銀河や宇宙の大規模構造の形成や進化を探るものである。これはすばる望遠鏡の高い集光力やHyper Suprime-Camによる広視野撮像能力を活用しなければ成し遂げることができない、世界で唯一本研究のみが達成可能な研究成果である。加えて、日本が誇るすばる望遠鏡により謎に包まれた宇宙の暗黒成分の正体に迫り、そして我々の住む宇宙がどのように形成されたのかを明らかにすることは、一般社会にとっても大変インパクトのある研究成果であると言える。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (5 results)

All 2019 2017

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

  • [Journal Article] Suppression of Low-mass Galaxy Formation around Quasars at z~2-32019

    • Author(s)
      Uchiyama Hisakazu、Kashikawa Nobunari、Overzier Roderik、Toshikawa Jun、Onoue Masafusa、Ishikawa Shogo、Kubo Mariko、Ito Kei、Namiki Shigeru、Liang Yongming
    • Journal Title

      The Astrophysical Journal

      Volume: 870 Issue: 1 Pages: 45-45

    • DOI

      10.3847/1538-4357/aaef7b

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Galaxy?Halo Connection in High-redshift Universe: Details and Evolution of Stellar-to-halo Mass Ratios of Lyman Break Galaxies on CFHTLS Deep Fields2017

    • Author(s)
      Ishikawa Shogo、Kashikawa Nobunari、Toshikawa Jun、Tanaka Masayuki、Hamana Takashi、Niino Yuu、Ichikawa Kohei、Uchiyama Hisakazu
    • Journal Title

      The Astrophysical Journal

      Volume: 841 Issue: 1 Pages: 8-8

    • DOI

      10.3847/1538-4357/aa6d64

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] The Subaru Low-redshift Galaxy Clustering with Photometric Redshift2019

    • Author(s)
      石川将吾
    • Organizer
      2019年日本天文学会春季年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] The Galaxy-Halo Connection in High-redshift Universe2017

    • Author(s)
      石川将吾
    • Organizer
      日本天文学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] The Galaxy-Halo Connection Across Cosmic History2017

    • Author(s)
      石川将吾
    • Organizer
      銀河進化研究会
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2020-03-30  

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