Revealing Massive Star Formation through Theory and Observation

• Project/Area Number: 19K14760
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 16010:Astronomy-related
• Research Institution: Tokyo Institute of Technology (2022-2023); National Astronomical Observatory of Japan (2020-2021); Osaka University (2019)
• Principal Investigator: 田中 圭 東京工業大学, 理学院, 助教 (20634455)
• Project Period (FY): 2019-04-01 – 2024-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 大質量星形成 / ALMA / 降着円盤 / ダスト / 低金属量 / 大質量星原始星 / 模擬観測 / 大質量原始星 / MHDシミュレーション / 輻射フィードバック / 理論天文学 / 電波天文学 / 計算物理

Outline of Research at the Start

本研究課題では、大質量星の形成過程に理論・観測の両面から迫る。大質量星は、自身が放出する強烈な輻射と磁場駆動のアウトフローによる複合的なフィードバックを受けながら誕生する。しかし、両物理機構を整合的に考慮した研究は未だに行われていない。そこで本研究では輻射磁気流体シミュレーションにより、両フィードバックのもとでの大質量星形成の様子を理論的に明らかにしてゆく。同時に、最新のALMA望遠鏡による大質量原始星の観測提案・データ解析も進める。理論モデルと観測データの比較により、強烈な輻射と磁気駆動風のもとでの大質量星形成過程の解明を目指す。

Outline of Annual Research Achievements

最終年度、理論面からは、ダスト成長・破壊を考慮した大質量原始星円盤のモデル構築, MHDシミュレーションによる原始星アウトフローの力学特性と観測特性予測, 大質量原始星団形成におけるHii領域の観測特性予測などに関する論文が４本出版された。特に、降着率が非常に高い大質量原始星円盤においてもダストは数百μm程度まで成長することが明らかとなった意義は大きい。このダスト成長は観測特性に重大な影響を与えうるため、山室氏と協力のうえ、円盤モデルから連続波観測予測を可能とする新しい解析解を導出し、それを利用することで大質量原始星円盤GGD27-M1のALMA観測からダストサイズや降着率などを見積もることに成功した。現在、当該研究については２本の投稿論文を準備中である。観測研究としては、銀河系および大小マゼラン雲の大質量原始星に対するALMA高分解能観測など共著論文が６本出版されており、初期宇宙のような低金属量環境における大質量原始星の力学・化学過程の解明にも重要な成果が挙げられている。
研究期間を通じ、強烈なフィードバックのなかで大質量星がどのように誕生するのか、その様相が明らかになってきた。光電離領域が形成された後も降着円盤を通じたガス降着が継続するような大質量原始星を初めて発見し、その成果をもとに新たなサーベイ観測も進行している。また、フィードバック克服の鍵となる降着円盤の物理・化学特性の解明にも大きく貢献してきた。特に大質量原始星円盤におけるダスト合体成長や難揮発性物質蒸発という過程は、岩石惑星形成との関連性も高いことが新たに理解され、「熱い円盤」の研究は今後の星・惑星研究の重要なテーマのひとつになっていくと期待される。さらに低金属量環境における星形成について、理論だけでなく観測的研究を開始できたことは、今後の宇宙史を通じた星駅性の普遍性・多様性を解明する重要な一歩である。

Research Products

• [Int'l Joint Research] コロラド大学ボルダー校/アメリカ国立電波天文台/バージニア大学(米国)
• [Int'l Joint Research] チャルマース工科大学(スウェーデン)
• [Int'l Joint Research] 上海交通大学/Zhejiang Laboratory(中国)
• [Int'l Joint Research] コロラド大学ボルダー校/バージニア大学/アメリカ国立電波天文台(米国)
• [Int'l Joint Research] チャルマース工科大学(スウェーデン)
• [Int'l Joint Research] Zhejiang Laboratory(中国)
• [Int'l Joint Research] ウィーン大学(オーストリア)
• [Int'l Joint Research] コロラド大学ボルダー校/アメリカ国立電波天文台/バージニア大学(米国)
• [Int'l Joint Research] チャルマース工科大学(スウェーデン)
• [Int'l Joint Research] ケルン大学(ドイツ)
• [Int'l Joint Research] チャルマース工科大学(スウェーデン)
• [Int'l Joint Research] コロラド大学ボルダー校/アメリカ国立電波天文台/ヴァージン諸島大学(米国)
• [Int'l Joint Research] ケルン大学(ドイツ)
• [Int'l Joint Research] チャルマース工科大学(スウェーデン)
• [Int'l Joint Research] アメリカ国立電波天文台/ヴァージン諸島大学(米国)
• [Journal Article] Astrochemical Diagnostics of the Isolated Massive Protostar G28.20-0.05 (2024)
  • Author(s): Gorai Prasanta、Law Chi-Yan、Tan Jonathan C.、Zhang Yichen、Fedriani Ruben、Tanaka Kei E. I.、Bonfand Melisse、Cosentino Giuliana、Mardones Diego、Beltran Maria T.、Garay Guido
  • Journal Title: The Astrophysical Journal Volume: 960 Issue: 2 Pages: 127-127
  • DOI: 10.3847/1538-4357/ad09bb
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Near-infrared observations of outflows and young stellar objects in the massive star-forming region AFGL 5180 (2024)
  • Author(s): Crowe S.、Fedriani R.、Tan J. C.、Whittle M.、Zhang Y.、Caratti o Garatti A.、Farias J. P.、Gautam A.、Telkamp Z.、Rothberg B.、Grudic M.、Andersen M.、Cosentino G.、Garcia-Lopez R.、Rosero V.、Tanaka K.
  • Journal Title: Astronomy & Astrophysics Volume: 682 Pages: A2-A2
  • DOI: 10.1051/0004-6361/202348094
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Disk Wind Feedback from High-mass Protostars. III. Synthetic CO Line Emission (2024)
  • Author(s): Xu Duo、Tan Jonathan C.、Staff Jan E.、Ramsey Jon P.、Zhang Yichen、Tanaka Kei E. I.
  • Journal Title: The Astrophysical Journal Volume: 966 Issue: 1 Pages: 117-117
  • DOI: 10.3847/1538-4357/ad3211
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Detection of Hot Molecular Cores in the Small Magellanic Cloud (2023)
  • Author(s): Shimonishi Takashi、Tanaka Kei E. I.、Zhang Yichen、Furuya Kenji
  • Journal Title: The Astrophysical Journal Letters Volume: 946 Issue: 2 Pages: L41-L41
  • DOI: 10.3847/2041-8213/acc031
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Disk Wind Feedback from High-mass Protostars. II. The Evolutionary Sequence (2023)
  • Author(s): Staff Jan E.、Tanaka Kei E. I.、Ramsey Jon P.、Zhang Yichen、Tan Jonathan C.
  • Journal Title: The Astrophysical Journal Volume: 947 Issue: 1 Pages: 40-40
  • DOI: 10.3847/1538-4357/acbd47
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution (2023)
  • Author(s): Yamamuro Ryota、Tanaka Kei E. I.、Okuzumi Satoshi
  • Journal Title: The Astrophysical Journal Volume: 949 Issue: 1 Pages: 29-29
  • DOI: 10.3847/1538-4357/acc52f
  • Peer Reviewed / Open Access
• [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、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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Chemical Evolution of Some Selected Complex Organic Molecules in Low-mass Star-forming Regions (2023)
  • Author(s): Bhat Bratati、Kar Rumela、Mondal Suman Kumar、Ghosh Rana、Gorai Prasanta、Shimonishi Takashi、Tanaka Kei E. I.、Furuya Kenji、Das Ankan
  • Journal Title: The Astrophysical Journal Volume: 958 Issue: 2 Pages: 111-111
  • DOI: 10.3847/1538-4357/acfc4d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [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.、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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Observational signatures of forming young massive clusters: continuum emission from dense HII regions (2023)
  • Author(s): Inoguchi Mutsuko、Hosokawa Takashi、Fukushima Hajime、Tanaka Kei E I、Yajima Hidenobu、Mineshige Shin
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Issue: 2 Pages: 3612-3623
  • DOI: 10.1093/mnras/stad3297
  • Peer Reviewed / Open Access
• [Journal Article] Salt-bearing Disk Candidates around High-mass Young Stellar Objects (2023)
  • Author(s): Ginsburg Adam、McGuire Brett A.、Sanhueza Patricio、Olguin Fernando、Maud Luke T.、Tanaka Kei E. I.、Zhang Yichen、Beuther Henrik、Indriolo Nick
  • Journal Title: The Astrophysical Journal Volume: 942 Issue: 2 Pages: 66-66
  • DOI: 10.3847/1538-4357/ac9f4a
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution (2023)
  • Author(s): Ryota Yamamuro, Kei E. I. Tanaka, Satoshi Okuzumi
  • Journal Title: The Astrophysical Journal Volume: -
  • Peer Reviewed / Open Access
• [Journal Article] Vibrationally Excited Lines of HC3N Associated with the Molecular Disk around the G24.78+0.08 A1 Hypercompact H ii Region (2022)
  • Author(s): Taniguchi Kotomi、Tanaka Kei E. I.、Zhang Yichen、Fedriani Ruben、Tan Jonathan C.、Takakuwa Shigehisa、Nakamura Fumitaka、Saito Masao、Majumdar Liton、Herbst Eric
  • Journal Title: The Astrophysical Journal Volume: 931 Issue: 2 Pages: 99-99
  • DOI: 10.3847/1538-4357/ac69d1
  • Peer Reviewed / Open Access / 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 Group (2022)
  • Author(s): Tokuda Kazuki et al.
  • Journal Title: The Astrophysical Journal Volume: 933 Issue: 1 Pages: 20-20
  • DOI: 10.3847/1538-4357/ac6b3c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Massive Protostars in a Protocluster - A Multi-scale ALMA View of G35.20-0.74N (2022)
  • Author(s): Zhang Yichen、Tanaka Kei E. I.、Tan Jonathan C.、Yang Yao-Lun、Greco Eva、Beltran Maria T.、Sakai Nami、De Buizer James M.、Rosero Viviana、Fedriani Ruben、Garay Guido
  • Journal Title: The Astrophysical Journal Volume: 936 Issue: 1 Pages: 68-68
  • DOI: 10.3847/1538-4357/ac847f
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The First Detection of a Protostellar CO Outflow in the Small Magellanic Cloud with ALMA (2022)
  • 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
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Protostellar-disc fragmentation across all metallicities (2022)
  • Author(s): Matsukoba Ryoki、Tanaka Kei E I、Omukai Kazuyuki、Vorobyov Eduard I、Hosokawa Takashi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 515 Issue: 4 Pages: 5506-5522
  • DOI: 10.1093/mnras/stac2161
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Isolated Massive Star Formation in G28.20-0.05 (2022)
  • Author(s): Law Chi-Yan、Tan Jonathan C.、Gorai Prasanta、Zhang Yichen、Fedriani Ruben、Tafoya Daniel、Tanaka Kei E. I.、Cosentino Giuliana、Yang Yao-Lun、Mardones Diego、Beltran Maria T.、Garay Guido
  • Journal Title: The Astrophysical Journal Volume: 939 Issue: 2 Pages: 120-120
  • DOI: 10.3847/1538-4357/ac90c7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars (2022)
  • Author(s): Fedriani Ruben、Tan Jonathan C.、Telkamp Zoie、Zhang Yichen、Yang Yao-Lun、Liu Mengyao、De Buizer James M.、Law Chi-Yan、Beltran Maria T.、Rosero Viviana、Tanaka Kei E. I.、Cosentino Giuliana、Gorai Prasanta、Farias Juan、Staff Jan E.、Whitney Barbara
  • Journal Title: The Astrophysical Journal Volume: 942 Issue: 1 Pages: 7-7
  • DOI: 10.3847/1538-4357/aca4cf
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Supersonic Expansion of the Bipolar H ii Region Sh2-106: A 3500 Year Old Explosion? (2022)
  • Author(s): Bally John、Chia Zen、Ginsburg Adam、Reipurth Bo、Tanaka Kei E. I、Zinnecker Hans、Faulhaber John
  • Journal Title: The Astrophysical Journal Volume: 924 Issue: 2 Pages: 50-50
  • DOI: 10.3847/1538-4357/ac30de
  • Peer Reviewed / Open Access
• [Journal Article] Photodissociation region diagnostics across galactic environments (2021)
  • Author(s): Bisbas Thomas G、Tan Jonathan C、Tanaka Kei E I
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 502 Issue: 2 Pages: 2701-2732
  • DOI: 10.1093/mnras/stab121
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Protostellar Collapse: Regulation of the Angular Momentum and Onset of an Ionic Precursor (2020)
  • Author(s): Marchand Pierre、Tomida Kengo、Tanaka Kei E. I.、Commercon Benoit、Chabrier Gilles
  • Journal Title: The Astrophysical Journal Volume: 900 Issue: 2 Pages: 180-180
  • DOI: 10.3847/1538-4357/abad99
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Salt, Hot Water, and Silicon Compounds Tracing Massive Twin Disks (2020)
  • Author(s): Tanaka Kei E. I.、Zhang Yichen、Hirota Tomoya、Sakai Nami、Motogi Kazuhito、Tomida Kengo、Tan Jonathan C.、Rosero Viviana、Higuchi Aya E.、Ohashi Satoshi、Liu Mengyao、Sugiyama Koichiro
  • Journal Title: The Astrophysical Journal Volume: 900 Issue: 1 Pages: 1-11
  • DOI: 10.3847/2041-8213/abadfc
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The SOFIA Massive (SOMA) Star Formation Survey. III. From Intermediate- to High-mass Protostars (2020)
  • Author(s): Liu Mengyao、Tan Jonathan C.、De Buizer James M.、Zhang Yichen、Moser Emily、Beltran Maria T.、Staff Jan E.、Tanaka Kei E. I.、Whitney Barbara、Rosero Viviana、Yang Yao-Lun、Fedriani Rubin
  • Journal Title: The Astrophysical Journal Volume: 904 Issue: 1 Pages: 75-75
  • DOI: 10.3847/1538-4357/abbefb
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Bimodal Behavior and Convergence Requirement in Macroscopic Properties of the Multiphase Interstellar Medium Formed by Atomic Converging Flows (2020)
  • Author(s): Kobayashi Masato I. N.、Inoue Tsuyoshi、Inutsuka Shu-ichiro、Tomida Kengo、Iwasaki Kazunari、Tanaka Kei E. I.
  • Journal Title: The Astrophysical Journal Volume: 905 Issue: 2 Pages: 95-95
  • DOI: 10.3847/1538-4357/abc5be
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Chemistry and physics of a low-metallicity hot core in the Large Magellanic Cloud (2020)
  • Author(s): Shimonishi, T., Das, A., Sakai, N., Tanaka, K. E. I., Aikawa, Y., Onaka, T., Watanabe, Y., and Nishimura, Y.
  • Journal Title: The Astrophysical Journal Volume: 891 Issue: 2 Pages: 164-164
  • DOI: 10.3847/1538-4357/ab6e6b
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Disk Wind Feedback from High-mass Protostars (2019)
  • Author(s): Staff Jan E.、Tanaka Kei E. I.、Tan Jonathan C.
  • Journal Title: The Astrophysical Journal Volume: 882 Issue: 2 Pages: 123-123
  • DOI: 10.3847/1538-4357/ab36b3
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Discovery of a Photoionized Bipolar Outflow toward the Massive Protostar G45.47+0.05 (2019)
  • Author(s): Zhang Yichen、Tanaka Kei E. I.、Rosero Viviana、Tan Jonathan C.、Marvil Joshua、Cheng Yu、Liu Mengyao、Beltran Maria T.、Garay Guido
  • Journal Title: The Astrophysical Journal Volume: 886 Issue: 1 Pages: L4-L4
  • DOI: 10.3847/2041-8213/ab5309
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] The Power of Outflows in Low-metallicity Star Formation (2023)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: Protostars and Planets VII
  • Int'l Joint Research
• [Presentation] MAgellanic Outflow and chemistry Survey (MAGOS): The Power of Molecular Outflows in Low-metallicity Star Formation (2023)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: The Olympian Symposium 2023
  • Int'l Joint Research
• [Presentation] The Power of Molecular Outflows in Low-metallicity Star Formation (2023)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: ALMA at 10 years: Past, Present, and Future
  • Int'l Joint Research
• [Presentation] The Spicy Genesis of Massive Stars (2023)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: Simulating Physics in Celestial Ecosystems (SPiCE)
  • Int'l Joint Research
• [Presentation] 大小マゼラン雲における原始星アウトフロー観測 (2023)
  • Author(s): 田中圭
  • Organizer: 近傍宇宙の観測的研究で探る星間物質ライフサイクル
  • Invited
• [Presentation] Hot Disks in Massive Star Formation (2023)
  • Author(s): 田中圭
  • Organizer: 惑星形成討論会2023春
• [Presentation] MAGellanic Outflow and chemistry Survey (MAGOS) II: 大小マゼラン雲原始 星アウトフローの物理特性 (2023)
  • Author(s): 田中圭, Yichen Zhang, 下西隆, 富田賢吾, Jonathan C. Tan, 野村英子, John Bally
  • Organizer: 日本天文学会2023年春季年会
• [Presentation] The hot and dynamical birth of massive stars (2023)
  • Author(s): Kei Tanaka
  • Organizer: 宇宙電波懇談会シンポジウム
  • Invited
• [Presentation] Massive Star Formation: Now & Then (2022)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: A half century of mm/submm astronomy
  • Int'l Joint Research
• [Presentation] Massive Protostellar Disks as a Hot Laboratory (2022)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: DIG (Dust, Ice, and Gas) Astrochemistry
  • Int'l Joint Research / Invited
• [Presentation] Massive Star Formation in Different Environments (2022)
  • Author(s): Kei E. I. Tanaka et al
  • Organizer: Star Formation in Different Environments 2022
  • Int'l Joint Research / Invited
• [Presentation] The Hot and Dynamic Birth of Massive Stars (2022)
  • Author(s): Kei E. I. Tanaka
  • Organizer: the 44th COSPAR Scientific Assembly
  • Int'l Joint Research / Invited
• [Presentation] Massive Star Formation at Various Metallicities (2022)
  • Author(s): Kei E. I. Tanaka
  • Organizer: From Stars to Galaxies II
  • Int'l Joint Research
• [Presentation] The Hot and Dynamic Birth of Massive Stars from the ngVLA Perspective (2022)
  • Author(s): Kei E. I. Tanaka, Yichen Zhang, Kazuhito Motogi
  • Organizer: Computational Astrophysics in the ngVLA Era
  • Int'l Joint Research
• [Presentation] Metallicity Dependences of Massive Star Formation from Theoretical and Observational Perspectives (2022)
  • Author(s): Kei E. I. Tanaka et al.
  • Organizer: IAU Symposium 361: Massive Stars Near and Far
  • Int'l Joint Research
• [Presentation] MAGellanic Outflow and chemistry Survey (MAGOS): Exploring the Universality/Diversity of Star Formation at Various Metallicities (2022)
  • Author(s): Kei E. I. Tanaka, Yichen Zhang, Takashi Shimonishi, Kengo Tomida, Jonathan C. Tan, Hideko Nomura, John Bally
  • Organizer: Origins Workshop - ISM, Star and Cluster Formation
  • Int'l Joint Research
• [Presentation] ALMAで探る低金属量大質量星形成 (2022)
  • Author(s): 田中圭, Yichen Zhang, 下西隆
  • Organizer: 初代星・初代銀河研究会2021
• [Presentation] MAGellanic Outflow and chemistry Survey (MAGOS): the Power of LMC Protostellar Outflows (2022)
  • Author(s): Kei E. I. Tanaka, Yichen Zhang, Takashi Shimonishi, Kengo Tomida, Jonathan C. Tan, Hideko Nomura, John Bally
  • Organizer: 日本天文学会2022年春季年会
• [Presentation] 多様な金属量環境における大質量星形成 (2022)
  • Author(s): 田中圭
  • Organizer: 新学術領域「星・惑星形成」2021年度大研究会プログラム
• [Presentation] 熱くて塩っぱい大質量原始星円盤:星形成観測から隕石学への架け橋? (2021)
  • Author(s): 田中圭
  • Organizer: Japan Geoscience Union Meeting 2022
  • Invited
• [Presentation] アルマ望遠鏡で探る低金属量星形成のダイナミクス (2021)
  • Author(s): 田中圭, Yichen Zhang, 下西隆
  • Organizer: 新学術領域「星惑星形成」後半戦キックオフミーティング
• [Presentation] Accretion and Feedback in Massive Star Formation (2021)
  • Author(s): 田中圭
  • Organizer: 様々なスケールの衝突流による誘発的星形成
  • Invited
• [Presentation] Feedback in Massive Star Formation at Low Metallicities (2021)
  • Author(s): 田中圭
  • Organizer: The metal-poor Universe 2021
• [Presentation] The Hot and Dynamic Birth of Massive Stars (2021)
  • Author(s): 田中圭
  • Organizer: Linking the science of large interferometers in the 2030s
  • Invited
• [Presentation] 低金属量環境での大質量星形成 (2021)
  • Author(s): 田中圭
  • Organizer: 低金属量環境下における星・惑星形成
• [Presentation] Hot Salty Disks around Massive Protostars (2021)
  • Author(s): Kei E. I. Tanaka
  • Organizer: East-Asian ALMA Science Workshop 2021
  • Int'l Joint Research / Invited
• [Presentation] Salty Twin Disks in IRAS 16547-4247 (2021)
  • Author(s): Kei E. I. Tanaka, Yichen Zhang, Tomoya Hirota, Nami Sakai, Kazuhito Motogi, Kengo Tomida, Jonathan C. Tan, Viviana Rosero, Aya E. Higuchi, Satoshi Ohashi, Mengyao Liu, & Koichiro Sugiyama
  • Organizer: The 237th AAS Meeting
  • Int'l Joint Research
• [Presentation] ngVLAで観る大質量形成：近接連星と熱い円盤 (2021)
  • Author(s): 田中圭, Yichen Zhang, 元木業人, 坂井南美, Jonathan C. Tan, Viviana Rosero
  • Organizer: 天文学会2021年春季年会
• [Presentation] Salt, Hot Water, and Silicon Compounds Tracing Massive Twin Disks (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: ALMA Grant Fellow Symposium 2020
• [Presentation] Dynamics of Low-Metallicity Star Formation (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: Molecular gas observations toward the Local Group and the outer Milky Way, 名古屋大学, 愛知県
• [Presentation] Feedback in Very-Massive Star Formation (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: 大質量星形成ワークショップ, 山口県
• [Presentation] Feedback in Massive Star Formation (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: East-Asian ALMA Science Workshop 2019, ASIAA, Taipei, Taiwan
  • Int'l Joint Research
• [Presentation] Massive Star Formation (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: The Evolution of Massive Stars and Formation of Compact Stars, Waseda University, Tokyo, Japan
  • Int'l Joint Research / Invited
• [Presentation] Metallicity Dependence of Massive Star Formation (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: First Stars VI, Universidad de Concepcion, Concepcion, Chile
  • Int'l Joint Research
• [Presentation] Analytic Modeling of Multiple Feedback (2020)
  • Author(s): Kei E. I. Tanaka
  • Organizer: Modeling High-Mass Stellar Feedback, University of Tubingen, Tubingen, Germany
  • Int'l Joint Research / Invited
• [Presentation] Synthetic Observations of Molecular Cloud Formation (2019)
  • Author(s): Kei E. I. Tanaka, Kazunari Iwasaki, Kengo Tomida
  • Organizer: From Stars to Planets II, Chalmers University of Technology, Gothenburg, Sweden
  • Int'l Joint Research
• [Presentation] 分子雲形成シミュレーションの模擬観測 (2019)
  • Author(s): 田中圭, 岩﨑一成, 富田賢吾
  • Organizer: 日本天文学会2019年秋季年会, 熊本大学, 熊本県
• [Presentation] Free-free Outflows and Synchrotron Jets in Massive Star Formation (2019)
  • Author(s): Kei E. I. Tanaka
  • Organizer: next generation VLA workshop, 国立天文台, 東京都
• [Presentation] ALMA View of Massive Star Formation (2019)
  • Author(s): Kei E. I. Tanaka, Kengo Tomida
  • Organizer: the ALMA Grant Symposium, 国立天文台, 東京都
• [Remarks] 塩と熱い水蒸気に包まれる巨大赤ちゃん星のペア
  • URL: https://alma-telescope.jp/news/press/salt-202009