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Elucidation of Cluster Formation Mechanisms through Measurement of Molecular Cloud Core Lifetimes

Research Project

Project/Area Number 21K13962
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 16010:Astronomy-related
Research InstitutionKyushu University (2022-2023)
Osaka Prefecture University (2021)

Principal Investigator

Tokuda Kazuki  九州大学, 理学研究院, 特任助教 (60802139)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords星形成 / 電波望遠鏡 / 分子雲コア / ALMA / 星団形成 / 分子雲フィラメント
Outline of Research at the Start

星団形成領域は文字通り様々な進化段階にある天体が密集しており、特に個別の星/連星系に至る直前の高密度ガス塊が特定されておらずその性質および形成要因が理解されていないことが要因の一つである。本研究では、太陽系から最も近傍にある星団形成領域の分子雲コアに埋め込まれている超高密度微細ガス塊をALMA望遠鏡の無バイアス広域観測により多数特定し、それらの性質を孤立した小質量星形成領域の研究で得られたものと比較する。星団形成領域における原始星形成直前のガス塊の個数およびその密度/形状や速度分布を初めて明らかにし、強い乱流場が星形成へと至るガス密度の時間発展などにどのように影響を与えるかを調べる。

Outline of Final Research Achievements

Stars primarily form in groups, but the mechanisms of their formation are significantly less understood compared to individual stars. Star-forming regions in clusters are literally dense with objects at various stages of evolution, and one reason for the lack of understanding is that high-density gas clumps that are on the verge of becoming individual stars or binary systems have not been specifically identified, and their properties and formation factors are not well understood. In this study, we identify numerous high-density clumps, spanning a few thousand AU, embedded in the molecular cloud cores of the nearest star-forming region to our solar system through unbiased wide-area observations with ALMA, and compare their properties with those obtained from studies of isolated low-mass star formation regions. In molecular cloud cores during cluster formation, turbulence predominates, and the gas clumps that can become seeds for stars are likely formed very dynamically.

Academic Significance and Societal Importance of the Research Achievements

学術的意義:天文物理学の知識進展:分子雲コアの寿命と星団形成の役割を理解することで、星や銀河の形成・進化に関する理論やモデルに影響を与えます。
方法論の革新:新しい測定方法や技術の開発は、他の天文学の分野にも応用可能です。社会的意義:教育への影響:宇宙の理解を深めることで、科学技術への関心を高め、教育の向上につながります。技術革新への触発:天体物理学の研究で開発された技術は他の分野にも応用されることがあります。文化的・哲学的影響:宇宙に対する理解は人類の自己認識を変え、文化や哲学の議論に影響を与えます。

Report

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

    (35 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (6 results) Journal Article (16 results) (of which Int'l Joint Research: 12 results,  Peer Reviewed: 16 results,  Open Access: 14 results) Presentation (13 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] NASA Goddard Space Flight Center/University of Illinois(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] United Arab Emirates University(アラブ首長国連邦)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute for Radio Astronomy(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Virginia/NASA Goddard Space Flight Center(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Universite Paris-Saclay(フランス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] United Arab Emirates University(アラブ首長国連邦)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Ring Gap Structure around Class I Protostar WL 172024

    • Author(s)
      Shoshi Ayumu、Harada Naoto、Tokuda Kazuki、Kawasaki Yoshihiro、Yamasaki Hayao、Sato Asako、Omura Mitsuki、Yamaguchi Masayuki、Tachihara Kengo、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal

      Volume: 961 Issue: 2 Pages: 228-228

    • DOI

      10.3847/1538-4357/ad12b5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Revealing Multiple Nested Molecular Outflows with Rotating Signatures in HH270mms1-A with ALMA2024

    • Author(s)
      Omura Mitsuki、Tokuda Kazuki、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal

      Volume: 963 Issue: 1 Pages: 72-72

    • DOI

      10.3847/1538-4357/ad19ce

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog2023

    • Author(s)
      Ohno Takahiro、Tokuda Kazuki、Konishi Ayu、Matsumoto Takeru、Sewio Marta、Kondo Hiroshi、Sano Hidetoshi、Tsuge Kisetsu、Zahorecz Sarolta、Goto Nao、Neelamkodan Naslim、Wong Tony、Fukushima Hajime、Takekoshi Tatsuya、Muraoka Kazuyuki、Kawamura Akiko、Tachihara Kengo、Fukui Yasuo、Onishi Toshikazu
    • Journal Title

      The Astrophysical Journal

      Volume: 949 Issue: 2 Pages: 63-63

    • DOI

      10.3847/1538-4357/accadb

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ACA CO(J = 2--1) Mapping of the Nearest Spiral Galaxy M33. I. Initial Results and Identification of Molecular Clouds2023

    • Author(s)
      Muraoka Kazuyuki、Konishi Ayu、Tokuda Kazuki、Yamada Rin I. et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 953 Issue: 2 Pages: 164-164

    • DOI

      10.3847/1538-4357/ace4bd

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Metallicity Dependence of Molecular Cloud Hierarchical Structure at Early Evolutionary Stages2023

    • Author(s)
      Kobayashi Masato I. N.、Iwasaki Kazunari、Tomida Kengo、Inoue Tsuyoshi、Omukai Kazuyuki、Tokuda Kazuki
    • Journal Title

      The Astrophysical Journal

      Volume: 954 Issue: 1 Pages: 38-38

    • DOI

      10.3847/1538-4357/ace34e

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Survey of CH<sub>3</sub>NH<sub>2</sub> and its Formation Process2023

    • Author(s)
      Suzuki Taiki、Majumdar Liton、Goldsmith Paul F.、Tokuda Kazuki、Minamoto Harumi、Ohishi Masatoshi、Saito Masao、Hirota Tomoya、Nomura Hideko、Oya Yoko
    • Journal Title

      The Astrophysical Journal

      Volume: 954 Issue: 2 Pages: 189-189

    • DOI

      10.3847/1538-4357/acdb6d

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud2023

    • Author(s)
      Tokuda Kazuki、Harada Naoto、Tanaka Kei E. I.、Inoue Tsuyoshi、Shimonishi Takashi、Zhang Yichen、Sewilo Marta、Kunitoshi Yuri、Konishi Ayu、Fukui Yasuo、Kawamura Akiko、Onishi Toshikazu、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal

      Volume: 955 Issue: 1 Pages: 52-52

    • DOI

      10.3847/1538-4357/acefb7

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An ALMA-resolved View of 7000 au Protostellar Gas Ring around the Class I Source CrA-IRS 2 as a Possible Sign of Magnetic Flux Advection2023

    • Author(s)
      Tokuda Kazuki、Fukaya Naofumi、Tachihara Kengo、Omura Mitsuki、Harada Naoto、Nozaki Shingo、Shoshi Ayumu、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 956 Issue: 1 Pages: L16-L16

    • DOI

      10.3847/2041-8213/acfca9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens2023

    • Author(s)
      Sato Asako、Tokuda Kazuki、Machida Masahiro N.、Tachihara Kengo、Harada Naoto、Yamasaki Hayao、Hirano Shingo、Onishi Toshikazu、Matsushita Yuko
    • Journal Title

      The Astrophysical Journal

      Volume: 958 Issue: 2 Pages: 102-102

    • DOI

      10.3847/1538-4357/ad0132

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2-72192023

    • Author(s)
      Alsaberi Rami Z E、Filipovi M D、Dai S、et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 527 Issue: 1 Pages: 1444-1460

    • DOI

      10.1093/mnras/stad3300

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Detection of Higher-order Millimeter Hydrogen Recombination Lines in the Large Magellanic Cloud2023

    • Author(s)
      Sewilo Marta、Tokuda Kazuki、Kurtz Stan E.、Charnley Steven B.、Maller Thomas、Wiseman Jennifer、Chen C.-H. Rosie、Indebetouw Remy、Sanchez-Monge Alvaro、Tanaka Kei E. I.、Schilke Peter、Onishi Toshikazu、Harada Naoto
    • Journal Title

      The Astrophysical Journal

      Volume: 959 Issue: 1 Pages: 22-22

    • DOI

      10.3847/1538-4357/acf5ed

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Crescent-shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA2023

    • Author(s)
      Harada Naoto、Tokuda Kazuki、Yamasaki Hayao、Sato Asako、Omura Mitsuki、Hirano Shingo、Onishi Toshikazu、Tachihara Kengo、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal

      Volume: 945 Issue: 1 Pages: 63-63

    • DOI

      10.3847/1538-4357/acb930

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The First Detection of a Protostellar CO Outflow in the Small Magellanic Cloud with ALMA2022

    • Author(s)
      Tokuda Kazuki、Zahorecz Sarolta、Kunitoshi Yuri、Higashino Kosuke、Tanaka Kei E. I.、Konishi Ayu、Suzuki Taisei、Kitano Naoya、Harada Naoto、Shimonishi Takashi、Neelamkodan Naslim、Fukui Yasuo、Kawamura Akiko、Onishi Toshikazu、Machida Masahiro N.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 936 Issue: 1 Pages: L6-L6

    • DOI

      10.3847/2041-8213/ac81c1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural and Dynamical Analysis of the Quiescent Molecular Ridge in the Large Magellanic Cloud2022

    • Author(s)
      Finn Molly K.、Indebetouw Remy、Johnson Kelsey E.、Costa Allison H.、Chen C.-H. Rosie、Kawamura Akiko、Onishi Toshikazu、Ott Jurgen、Sewilo Marta、Tokuda Kazuki、Wong Tony、Zahorecz Sarolta
    • Journal Title

      The Astronomical Journal

      Volume: 164 Issue: 2 Pages: 64-64

    • DOI

      10.3847/1538-3881/ac7aa1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] An ALMA Study of the Massive Molecular Clump N159W-North in the Large Magellanic Cloud: A Possible Gas Flow Penetrating One of the Most Massive Protocluster Systems in the Local Group2022

    • Author(s)
      Tokuda Kazuki et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 933 Issue: 1 Pages: 20-20

    • DOI

      10.3847/1538-4357/ac6b3c

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The 30 Doradus Molecular Cloud at 0.4 pc Resolution with the Atacama Large Millimeter/submillimeter Array: Physical Properties and the Boundedness of CO-emitting Structures2022

    • Author(s)
      Wong Tony, et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 932 Issue: 1 Pages: 47-47

    • DOI

      10.3847/1538-4357/ac723a

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 星形成初期段階における交換型不安定性による磁束輸送現象の探究 (1): ALMA による最初の対応天体候補の発見2024

    • Author(s)
      徳田一起 (九州大学/国立天文台), 深谷直史, 立原研悟 (名古屋大学), 町田正博, 大村充輝, 野崎信吾, 所司歩夢, 原田直人 (九州大学)
    • Organizer
      日本天文学会2024年春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Capturing Dynamic Magnetic Flux Transfer Processes in the Early Stages of Star Formation with ALMA2024

    • Author(s)
      Kazuki Tokuda
    • Organizer
      Magnetic Fields from Clouds to Stars (Bfields-2024)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ALMAによる大マゼラン雲大質量原始星に付随する高密度分子ガスの観測(3): 大質量ハブフィラメント形成と巨大分子雲の進化との関係2023

    • Author(s)
      徳田一起 (九州大学/国立天文台), 原田直人, 町田正博 (九州大学),他
    • Organizer
      日本天文学会2023年秋季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 星団形成領域Corona Australis分子雲内部のフィラメント状構造2023

    • Author(s)
      深谷直史
    • Organizer
      日本天文学会2023年春季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] ALMAによる大マゼラン雲大質量原始星に付随する高密度分子ガスの観測(2): 星団形成初期段階N159W-North大質量クランプの特徴2022

    • Author(s)
      徳田一起
    • Organizer
      日本天文学会2022年秋季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Corona Australis分子雲IRS7領域における分子雲コアの性質と星団形成2022

    • Author(s)
      深谷直史
    • Organizer
      日本天文学会2022年秋季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] ALMA 高分解能データで探る星団形成領域 Corona Australis IRS7 における分子雲コアの分裂2022

    • Author(s)
      深谷直史, 立原研悟, 西岡丈翔, 徳田一起, 山崎康正, 原田直人, 山崎駿, 町田正博, 深川美里
    • Organizer
      日本天文学会2022年春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] ALMA ACA サーベイで探る Corona Australis 領域の星形成 (4)2022

    • Author(s)
      西岡丈翔, 立原研悟, 山崎康正, 徳田一起, 深谷直史, 大西利和, 金井昂大, 大朝由美子, 松下祐子, 西合一矢, 深川美里, 原田直人, 佐 伯優, 柳玉華, 山崎駿, 町田正博, 深谷紗希
    • Organizer
      日本天文学会2022年春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] ALMA ACA サーベイで探る Corona Australis 領域の星形成 (3)2021

    • Author(s)
      西岡丈翔, 立原研悟, 山崎康正, 徳田一起, 大西利和, 金井昂大, 大朝由美子, 松下祐子, 西合一矢, 深川美里, 原田直人, 佐伯優, 柳玉 華, 山崎駿, 町田正博, 深谷紗希子
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] ALMA ACA サーベイで探る Taurus 領域分子雲コア進化の統計的研究 (6): 分 子雲コア速度構造の進化とその起源2021

    • Author(s)
      徳田一起, 三杉佳明, 立原研悟, 犬塚修一郎, 大橋永芳, 島尻芳人, 大西利和
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 大マゼラン雲 N159W-North 領域の大質量クランプの性質と形成過程2021

    • Author(s)
      南大晴, 近藤滉, 小西亜侑, 小西諒太朗, 鈴木大誠, 大西利和, 徳田一起, 柘植紀節, 立原研悟, 福井康雄, 南谷哲宏, 河村晶子
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 巨大星団形成領域RCW38における分子雲コアおよび原始星のALMA観測2021

    • Author(s)
      徳田一起
    • Organizer
      様々なスケールの衝突流による誘発的星形成 ~大質量星から超大質量星団まで~
    • Related Report
      2021 Research-status Report
  • [Presentation] Statistical properties of protostellar outflow revealed by survey-type observations2021

    • Author(s)
      徳田一起
    • Organizer
      Cold Outflows near and far: crossroads of our current understandings
    • Related Report
      2021 Research-status Report

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

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