分子雲コア寿命の測定を通した星団形成機構の解明

2023 Fiscal Year Annual Research Report

• Project/Area Number: 21K13962
• Research Institution: Kyushu University
• Principal Investigator: 徳田 一起 九州大学, 理学研究院, 特任助教 (60802139)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 星形成 / 電波望遠鏡 / 分子雲コア / 分子雲フィラメント / ALMA / 星団形成

Outline of Annual Research Achievements

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、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。 本年度は、大マゼラン雲のフィラメント状分子雲を多数検出し、どのような分子雲の進化段階で大質量星および星団形成に至るハブフィラメント状分子雲が形成されるか等を明らかにした論文を出版した(Tokuda et al., 2023, ApJ, 955, 52)。

Research Products

• [Int'l Joint Research] NASA Goddard Space Flight Center/University of Illinois(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: NASA Goddard Space Flight Center/University of Illinois
• [Int'l Joint Research] United Arab Emirates University(アラブ首長国連邦)
  • Country Name: UNITED ARAB EMIRATES
  • Counterpart Institution: United Arab Emirates University
• [Journal Article] Ring Gap Structure around Class I Protostar WL 17 (2024)
  • 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 Pages: 228～228
  • DOI: 10.3847/1538-4357/ad12b5
  • Peer Reviewed
• [Journal Article] Revealing Multiple Nested Molecular Outflows with Rotating Signatures in HH270mms1-A with ALMA (2024)
  • Author(s): Omura Mitsuki、Tokuda Kazuki、Machida Masahiro N.
  • Journal Title: The Astrophysical Journal Volume: 963 Pages: 72～72
  • DOI: 10.3847/1538-4357/ad19ce
  • Peer Reviewed
• [Journal Article] An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog (2023)
  • Author(s): Ohno Takahiro、Tokuda Kazuki、Konishi Ayu、Matsumoto Takeru、Sewi?o 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 Pages: 63～63
  • DOI: 10.3847/1538-4357/accadb
  • Peer Reviewed
• [Journal Article] ACA CO(J = 2-1) Mapping of the Nearest Spiral Galaxy M33. I. Initial Results and Identification of Molecular Clouds (2023)
  • Author(s): Muraoka Kazuyuki、Konishi Ayu、Tokuda Kazuki、et al.
  • Journal Title: The Astrophysical Journal Volume: 953 Pages: 164～164
  • DOI: 10.3847/1538-4357/ace4bd
  • Peer Reviewed
• [Journal Article] Metallicity Dependence of Molecular Cloud Hierarchical Structure at Early Evolutionary Stages (2023)
  • Author(s): Kobayashi Masato I. N.、Iwasaki Kazunari、Tomida Kengo、Inoue Tsuyoshi、Omukai Kazuyuki、Tokuda Kazuki
  • Journal Title: The Astrophysical Journal Volume: 954 Pages: 38～38
  • DOI: 10.3847/1538-4357/ace34e
  • Peer Reviewed
• [Journal Article] Survey of CH3NH2 and its Formation Process (2023)
  • 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 Pages: 189～189
  • DOI: 10.3847/1538-4357/acdb6d
  • Peer Reviewed
• [Journal Article] An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud (2023)
  • Author(s): Tokuda Kazuki、Harada Naoto、Tanaka Kei E. I.、Inoue Tsuyoshi、Shimonishi Takashi、Zhang Yichen、Sewi?o Marta、Kunitoshi Yuri、Konishi Ayu、Fukui Yasuo、Kawamura Akiko、Onishi Toshikazu、Machida Masahiro N.
  • Journal Title: The Astrophysical Journal Volume: 955 Pages: 52～52
  • DOI: 10.3847/1538-4357/acefb7
  • Peer Reviewed
• [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 Advection (2023)
  • 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 Pages: L16～L16
  • DOI: 10.3847/2041-8213/acfca9
  • Peer Reviewed
• [Journal Article] Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens (2023)
  • 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 Pages: 102～102
  • DOI: 10.3847/1538-4357/ad0132
  • Peer Reviewed
• [Journal Article] ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2-7219 (2023)
  • Author(s): Alsaberi Rami Z E、Filipovi M D、Dai S、et al.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Pages: 1444～1460
  • DOI: 10.1093/mnras/stad3300
  • Peer Reviewed
• [Journal Article] The Detection of Higher-order Millimeter Hydrogen Recombination Lines in the Large Magellanic Cloud (2023)
  • Author(s): Sewilo Marta、Tokuda Kazuki、Kurtz Stan E.、Charnley Steven B.、Moller Thomas、Wiseman Jennifer、Chen C.-H. Rosie、Indebetouw Remy、Ssnchez-Monge, Alvaro、Tanaka Kei E. I.、Schilke Peter、Onishi Toshikazu、Harada Naoto
  • Journal Title: The Astrophysical Journal Volume: 959 Pages: 22～22
  • DOI: 10.3847/1538-4357/acf5ed
  • Peer Reviewed
• [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
• [Presentation] Capturing Dynamic Magnetic Flux Transfer Processes in the Early Stages of Star Formation with ALMA (2024)
  • Author(s): Kazuki Tokuda
  • Organizer: Magnetic Fields from Clouds to Stars (Bfields-2024)
  • 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