• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Probing Intermediate-mass Black Holes in the Galactic Center with the Observations of High-Velocity Compact Clouds

Research Project

Project/Area Number 19K14768
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 16010:Astronomy-related
Research InstitutionKanagawa University (2020-2023)
National Astronomical Observatory of Japan (2019)

Principal Investigator

Takekawa Shunya  神奈川大学, 工学部, 助教 (10827851)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords銀河系中心 / 中間質量ブラックホール / 分子雲 / 電波望遠鏡 / 星団
Outline of Research at the Start

太陽の100倍から10万倍程度の質量を持つ「中間質量ブラックホール」の存在確認は、大部分の銀河の中心に潜むとされている超大質量ブラックホールの起源を解明する上で欠かせない重要なプロセスである。本研究では、研究代表者が銀河系中心領域に発見した特異分子雲に着目して、分子ガス・電離ガス・恒星の観測を主軸として中間質量ブラックホールの存在確認を目指す。加えて、銀河系中心領域の大規模サーベイに基づいて、同種特異分子雲のサンプルの拡充を試みる。

Outline of Final Research Achievements

We have conducted high-resolution spectral line observations of high-velocity compact clouds (HVCCs) in the Galactic center with ALMA, revealing their detailed internal kinematics and physical conditions. As a result, we have successfully discovered several promising candidate sites where inactive intermediate-mass black holes may be lurking. In addition, we have carried out large-scale survey observations of the Galactic center region using the Nobeyama 45-m radio telescope to identify shocked molecular gas, allowing us to increase the sample of HVCCs.

Academic Significance and Societal Importance of the Research Achievements

本研究は、中間質量ブラックホール候補を新たに複数発見し、銀河中心核である超大質量ブラックホールの起源解明や成長過程の理解に重要な手がかりを提供し得るものである。天の川銀河の中心核近傍で中間質量ブラックホールの潜伏候補地を見出せたことは、将来の探査研究において非常に有益である。また、野辺山45m電波望遠鏡による広域サーベイ観測により、私たちの住む銀河の中心環境について新しい知見を得ることができた。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (33 results)

All 2024 2023 2022 2021 2020 2019 Other

All Journal Article (10 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 10 results,  Open Access: 7 results) Presentation (21 results) (of which Int'l Joint Research: 6 results,  Invited: 14 results) Remarks (2 results)

  • [Journal Article] ALMA View of the High-velocity-dispersion Compact Cloud CO 0.02?0.02 at the Galactic Center2023

    • Author(s)
      Iwata Yuhei、Oka Tomoharu、Takekawa Shunya、Tsujimoto Shiho、Enokiya Rei
    • Journal Title

      The Astrophysical Journal

      Volume: 950 Issue: 1 Pages: 25-25

    • DOI

      10.3847/1538-4357/acc9b0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evidence for a gamma-ray molecular target in the enigmatic PeVatron candidate LHAASO J2108+51572023

    • Author(s)
      de la Fuente E.、Toledano-Ju?rez I.、Kawata K.、Trinidad M. A.、Yamagishi M.、Takekawa S.、Tafoya D.、Ohnishi M.、Nishimura A.、Kato S.、Sako T.、Takita M.、Sano H.、Yadav R. K.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 675 Pages: L5-L5

    • DOI

      10.1051/0004-6361/202346681

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Predicting reliable H2 column density maps from molecular line data using machine learning2023

    • Author(s)
      Shimajiri Yoshito、Kawanishi Yasutomo、Fujita Shinji、Miyamoto Yusuke、Ito Atsushi M、Arzoumanian Doris、Andr? Philippe、Nishimura Atsushi、Tokuda Kazuki、Kaneko Hiroyuki、Takekawa Shunya、Ueda Shota、Onishi Toshikazu、Inoue Tsuyoshi、Nishimoto Shimpei、Yoneda Ryuki
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 526 Issue: 1 Pages: 966-981

    • DOI

      10.1093/mnras/stad2715

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Discovery of the Tadpole Molecular Cloud near the Galactic Nucleus2023

    • Author(s)
      Kaneko Miyuki、Oka Tomoharu、Yokozuka Hiroki、Enokiya Rei、Takekawa Shunya、Iwata Yuhei、Tsujimoto Shiho
    • Journal Title

      The Astrophysical Journal

      Volume: 942 Issue: 1 Pages: 46-46

    • DOI

      10.3847/1538-4357/aca66a

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] New Look at the Molecular Superbubble Candidate in the Galactic Center2021

    • Author(s)
      Tsujimoto Shiho、Oka Tomoharu、Takekawa Shunya、Iwata Yuhei、Uruno Asaka、Yokozuka Hiroki、Nakagawara Ryosuke、Watanabe Yuto、Kawakami Akira、Nishiyama Sonomi、Kaneko Miyuki、Kanno Shoko、Ogawa Takuma
    • Journal Title

      The Astrophysical Journal

      Volume: 910 Issue: 1 Pages: 61-61

    • DOI

      10.3847/1538-4357/abe61e

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Broad-velocity-width Molecular Features in the Galactic Plane2021

    • Author(s)
      Yokozuka Hiroki、Oka Tomoharu、Takekawa Shunya、Iwata Yuhei、Tsujimoto Shiho
    • Journal Title

      The Astrophysical Journal

      Volume: 908 Issue: 2 Pages: 246-246

    • DOI

      10.3847/1538-4357/abd556

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Time Variations in the Flux Density of Sgr A* at 230 GHz Detected with ALMA2020

    • Author(s)
      Iwata Yuhei、Oka Tomoharu、Tsuboi Masato、Miyoshi Makoto、Takekawa Shunya
    • Journal Title

      The Astrophysical Journal

      Volume: 892 Issue: 2 Pages: L30-L30

    • DOI

      10.3847/2041-8213/ab800d

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Fifth Candidate for an Intermediate-mass Black Hole in the Galactic Center2020

    • Author(s)
      Takekawa Shunya、Oka Tomoharu、Iwata Yuhei、Tsujimoto Shiho、Nomura Mariko
    • Journal Title

      The Astrophysical Journal

      Volume: 890 Issue: 2 Pages: 167-172

    • DOI

      10.3847/1538-4357/ab6f6f

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An energetic high-velocity compact cloud: CO-0.31+0.112019

    • Author(s)
      Takekawa Shunya、Oka Tomoharu、Tokuyama Sekito、Tanabe Kyosuke、Iwata Yuhei、Tsujimoto Shiho、Nomura Mariko、Shibuya Yukihiro
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 71 Issue: Supplement_1

    • DOI

      10.1093/pasj/psz027

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] High-resolution CO images of the Galactic central molecular zone2019

    • Author(s)
      Tokuyama Sekito、Oka Tomoharu、Takekawa Shunya、Iwata Yuhei、Tsujimoto Shiho、Yamada Masaya、Furusawa Maiko、Nomura Mariko
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 印刷中 Issue: Supplement_1

    • DOI

      10.1093/pasj/psy150

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Central Molecular Zoneに刻まれた爆発的中心核活動の痕跡2024

    • Author(s)
      竹川俊也、辻本志保、横塚弘樹、岡 朋治、金子美由起、原田ななせ、岩田悠平、榎谷玲依
    • Organizer
      天の川銀河研究会2024
    • Related Report
      2023 Annual Research Report
  • [Presentation] 銀河系中心の分子雲あれこれ2024

    • Author(s)
      竹川俊也
    • Organizer
      坪井先生退官記念 銀河中心研究会2024
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 野辺山45m鏡による銀河系中心衝撃波領域の広域探査2023

    • Author(s)
      竹川俊也、辻本志保、横塚弘樹、岡 朋治、金子美由起、原田ななせ、岩田悠平、榎谷玲依
    • Organizer
      銀河系中心研究会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ultra-compact clumps with extremely broad velocity widths in the Galactic center2023

    • Author(s)
      Shunya Takekawa, Tomoharu Oka, Miyuki Kaneko, Yuhei Iwata
    • Organizer
      宇宙電波懇談会シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 銀河系中心核近傍の超小型高速度コンパクト雲2023

    • Author(s)
      竹川俊也
    • Organizer
      ngVLA合同サイエンスワークショップ
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 野辺山45m鏡による銀河系中心衝撃波領域の広域イメージング観測2022

    • Author(s)
      竹川俊也、辻本志保、横塚弘樹、金子美由起、岡 朋治、榎谷玲依、岩田悠平
    • Organizer
      日本天文学会2022年秋季節年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 竹川俊也、岡 朋治、岩田悠平2022

    • Author(s)
      銀河系中心核近傍の超小型高速度コンパクト雲
    • Organizer
      日本天文学会2022年秋季節年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 銀河系中心領域における中間質量ブラックホール探査の可能性2022

    • Author(s)
      竹川俊也
    • Organizer
      宇宙電波懇談会シンポジウム2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 高速度分子雲による中間質量ブラックホール探査の可能性2021

    • Author(s)
      竹川俊也、岡 朋治、辻本志保、横塚弘樹、金子美由起、岩田悠平
    • Organizer
      JASMINE Consortium Meeting 2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 次世代単一鏡による高速度コンパクト雲の研究2021

    • Author(s)
      竹川俊也、岡 朋治、辻本志保、横塚弘樹、金子美由起、岩田悠平
    • Organizer
      日本天文学会 2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Nobeyama Large Program Report II: Galactic Center2021

    • Author(s)
      Shiho Tsujimoto, Tomoharu Oka, Hiroki Yokozuka, Miyuki Kaneko, Yuto Watanabe Ryosuke Nakagawara, Asaka Uruno, Sonomi Nishiyama, Rei Enokiya, Yuhei Iwata
    • Organizer
      ALMA/45m/ASTE Users Meeting 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 銀河系中心領域の特異分子雲2020

    • Author(s)
      竹川俊也
    • Organizer
      (サブ)ミリ波単一鏡の革新で挑む, 天文学の未解決問題
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Report of a 45m Large program2020

    • Author(s)
      Shunya Takekawa
    • Organizer
      ALMA/45m/ASTE Users Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 野辺山45m鏡による銀河系中心分子層の全面イメージング観測2020

    • Author(s)
      竹川俊也, 辻元志保, 岡 朋治, 岩田悠平, 横塚弘樹, 渡邉裕人, 中川原崚介, 宇留野麻香, 西山苑実, 金子美由起
    • Organizer
      Nobeyama Science Workshop 2020
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] ALMA views of high-velocity compact clouds in the Galactic center2020

    • Author(s)
      竹川俊也、岡 朋治、岩田悠平、辻本志保、野村真理子
    • Organizer
      East-Asian ALMA Science Workshop 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] High frequency studies of the Galactic center2019

    • Author(s)
      竹川俊也
    • Organizer
      East-Asian ALMA Development Workshop 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Report from Large program 2: Galactic Center2019

    • Author(s)
      竹川俊也、辻本志保、岡 朋治、岩田悠平、渡邉裕人、中川原崚介、横塚弘樹、宇留野麻香、長谷川哲夫、鳥居和史、坪井昌人
    • Organizer
      ALMA/45m/ASTE Users Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Intermediate-mass black hole candidates in the Galactic center2019

    • Author(s)
      竹川俊也、岡 朋治、岩田悠平、辻本志保、野村真理子
    • Organizer
      Galactic Center Workshop 2019: New Horizons in Galactic Center Astronomy and Beyond
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] High-velocity Compact Clouds in the Galactic Center2019

    • Author(s)
      竹川俊也、辻本志保、岡 朋治、岩田悠平、渡邉裕人、中川原崚介、横塚弘樹、宇留野麻香、長谷川哲夫、鳥居和史、坪井昌人
    • Organizer
      Nobeyama Science Workshop 令和元年
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] The Galactic Central Molecular Zone with ASTE2019

    • Author(s)
      竹川俊也
    • Organizer
      Sub-mm Spectroscopy and Large Scale Science with ASTE
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 銀河系中心領域に発見された中間質量ブラックホールの痕跡2019

    • Author(s)
      竹川俊也
    • Organizer
      東京大学天文学教室談話会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 神奈川大学工学部応用物理学科 教員・研究室紹介

    • URL

      https://www.phys.kanagawa-u.ac.jp/laboratory/laboratory-08.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 天の川銀河中心核近傍で「おたまじゃくし」分子雲を発見 - ブラックホールと戯れ中? -

    • URL

      https://www.kanagawa-u.ac.jp/cr_att/0011/26307_00.pdf

    • Related Report
      2022 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi