Kazuki Tokuda

Researcher Information

Research funding number

• 60802139

ORCID ID

•  https://orcid.org/0000-0002-2062-1600

J-Global ID

• 201901009578734000

Research Interests

• 星間ガス   星間物質   Galaxies   Star formation   Radio Astronomy   

Research Areas

• Natural sciences / Astronomy

Academic & Professional Experience

• 2025/04 - Today  Kagawa UniversityFaculty of Education講師
• 2022/04 - 2025/03  National Astronomical Observatory of Japanアルマプロジェクト特任助教
• 2022/04 - 2025/03  Kyushu UniversityGraduate School of Sciences特任助教 (学術研究員)
• 2022/02 - 2023/03  大阪府立大学
• 2017/02 - 2022/01  大阪府立大学/国立天文台
• 2017/01 - 2017/01  大阪府立大学

Association Memberships

• 国際天文学連合(IAU)   THE ASTRONOMICAL SOCIETY OF JAPAN   

Published Papers

• Infrared bubble recognition in the Milky Way and beyond using deep learning

  Shimpei Nishimoto; Toshikazu Onishi; Atsushi Nishimura; Shinji Fujita; Yasutomo Kawanishi; Shuyo Nakatani; Kazuki Tokuda; Yoshito Shimajiri; Hiroyuki Kaneko; Yusuke Miyamoto; Tsuyoshi Inoue; Atsushi M Ito

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 77 (2) 403 - 424 0004-6264 2025/03 [Refereed]
  
• Giant Molecular Clouds in RCW 106 (G333): Galactic Mini-starbursts and Massive Star Formation Induced by Supersonic Cloud–Cloud Collisions

  Mikito 樹人 Kohno 河野; Rin I. 麟 Yamada 山田; Kengo 研悟 Tachihara 立原; Shinji 真司 Fujita 藤田; Rei 玲依 Enokiya 榎谷; Kazuki 一起 Tokuda 徳田; Asao 朝男 Habe 羽部; Hidetoshi 栄俊 Sano 佐野; Takahiro 貴敬 Hayakawa 早川; Fumika 史夏 Demachi 出町; Takuto 拓冬 Ito 伊藤; Kisetsu 紀節 Tsuge 柘植; Atsushi 淳 Nishimura 西村; Masato I. N. 将人 Kobayashi 小林; Hiroaki 宏昭 Yamamoto 山本; Yasuo 康雄 Fukui 福井

  The Astronomical Journal American Astronomical Society 169 (3) 181 - 181 0004-6256 2025/02 [Refereed]
  
• ALMA 0.1 pc View of Molecular Clouds Associated with High-mass Protostellar Systems in the Small Magellanic Cloud: Are Low-metallicity Clouds Filamentary or Not?

  Kazuki Tokuda; Yuri Kunitoshi; Sarolta Zahorecz; Kei E. I. Tanaka; Itsuki Murakoso; Naoto Harada; Masato I. N. Kobayashi; Tsuyoshi Inoue; Marta Sewiło; Ayu Konishi; Takashi Shimonishi; Yichen Zhang; Yasuo Fukui; Akiko Kawamura; Toshikazu Onishi; Masahiro N. Machida

  The Astrophysical Journal American Astronomical Society 980 (2) 269 - 269 0004-637X 2025/02 [Refereed]
  
• Tracking Star-forming Cores as Mass Reservoirs in Clustered and Isolated Regions Using Numerical Passive Tracer Particles

  Shingo Nozaki; Hajime Fukushima; Kazuki Tokuda; Masahiro N. Machida

  The Astrophysical Journal American Astronomical Society 980 (1) 101 - 101 0004-637X 2025/02 [Refereed]
  
• Giant molecular clouds and their type classification in M 74: Toward understanding star formation and cloud evolution

  Fumika Demachi; Yasuo Fukui; Rin I Yamada; Kengo Tachihara; Takahiro Hayakawa; Kazuki Tokuda; Shinji Fujita; Masato I N Kobayashi; Kazuyuki Muraoka; Ayu Konishi; Kisetsu Tsuge; Toshikazu Onishi; Akiko Kawamura

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 0004-6264 2024/08 [Refereed]
  
• ACA CO(J = 2–1) mapping of the nearest spiral galaxy M 33. II. Exploring the evolution of giant molecular clouds

  Ayu Konishi; Kazuyuki Muraoka; Kazuki Tokuda; Shinji Fujita; Yasuo Fukui; Rin I Yamada; Fumika Demachi; Kengo Tachihara; Masato I N Kobayashi; Nario Kuno; Kisetsu Tsuge; Hidetoshi Sano; Rie E Miura; Akiko Kawamura; Toshikazu Onishi

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 0004-6264 2024/08 [Refereed]
  
• Internal 1000 au Scale Structures of the R CrA Cluster-forming Cloud. I. Filamentary Structures

  Kengo Tachihara; Naofumi Fukaya; Kazuki Tokuda; Yasumasa Yamasaki; Takeru Nishioka; Daisei Abe; Tsuyoshi Inoue; Naoto Harada; Ayumu Shoshi; Shingo Nozaki; Asako Sato; Mitsuki Omura; Kakeru Fujishiro; Misato Fukagawa; Masahiro N. Machida; Takahiro Kanai; Yumiko Oasa; Toshikazu Onishi; Kazuya Saigo; Yasuo Fukui

  The Astrophysical Journal American Astronomical Society 968 (2) 131 - 131 0004-637X 2024/06 [Refereed]
  
• High-mass star formation in the Large Magellanic Cloud triggered by colliding H i flows

  Kisetsu Tsuge; Hidetoshi Sano; Kengo Tachihara; Kenji Bekki; Kazuki Tokuda; Tsuyoshi Inoue; Norikazu Mizuno; Akiko Kawamura; Toshikazu Onishi; Yasuo Fukui

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 0004-6264 2024/05 [Refereed]
  
• Discovery of Asymmetric Spike-like Structures of the 10 au Disk around the Very Low-luminosity Protostar Embedded in the Taurus Dense Core MC 27/L1521F with ALMA

  Kazuki Tokuda; Naoto Harada; Mitsuki Omura; Tomoaki Matsumoto; Toshikazu Onishi; Kazuya Saigo; Ayumu Shoshi; Shingo Nozaki; Kengo Tachihara; Naofumi Fukaya; Yasuo Fukui; Shu Ichiro Inutsuka; Masahiro N. Machida

  Astrophysical Journal 965 (2) 0004-637X 2024/04 [Refereed]
  
• Revealing Multiple Nested Molecular Outflows with Rotating Signatures in HH270mms1-A with ALMA

  Omura, M.; Tokuda, K.; Machida, M.N.

  Astrophysical Journal 963 (1) 1538-4357 2024/03 [Refereed]
  
• Ring Gap Structure around Class I Protostar WL 17

  Ayumu Shoshi; Naoto Harada; Kazuki Tokuda; Yoshihiro Kawasaki; Hayao Yamasaki; Asako Sato; Mitsuki Omura; Masayuki Yamaguchi; Kengo Tachihara; Masahiro N. Machida

  Astrophysical Journal 961 (2) 0004-637X 2024/02 [Refereed]
  
• ATCA study of Small Magellanic Cloud supernova remnant 1E 0102.2–7219

  Alsaberi, R.Z.E.; Filipovi?, M.D.; Dai, S.; Sano, H.; Kothes, R.; Payne, J.L.; Bozzetto, L.M.; Brose, R.; Collischon, C.; Crawford, E.J.; Haberl, F.; Hill, T.; Kavanagh, P.J.; Knies, J.; Leahy, D.; Macgregor, P.J.; Maggi, P.; Maitra, C.; Manojlovi?, P.; Mart{\'i}n, S.; Matthew, C.; Ralph, N.O.; Rowell, G.; Ruiter, A.J.; Sasaki, M.; Seitenzahl, I.R.; Tokuda, K.; Tothill, N.F.H.; Uro?evi?, D.; Van Loon, J.Th; Velovi?, V.; Vogt, F.P.A.

  Monthly Notices of the Royal Astronomical Society 527 (1) 1365-2966 2024
• The Detection of Higher-order Millimeter Hydrogen Recombination Lines in the Large Magellanic Cloud

  Marta Sewiło; Kazuki Tokuda; Stan E. Kurtz; Steven B. Charnley; Thomas Möller; Jennifer Wiseman; C. H.Rosie Chen; Remy Indebetouw; Álvaro Sánchez-Monge; Kei E.I. Tanaka; Peter Schilke; Toshikazu Onishi; Naoto Harada

  Astrophysical Journal 959 (1) 0004-637X 2023/12 [Refereed]
  
• Secondary Outflow Driven by the Protostar Ser-emb 15 in Serpens

  Asako Sato; Kazuki Tokuda; Masahiro N. Machida; Kengo Tachihara; Naoto Harada; Hayao Yamasaki; Shingo Hirano; Toshikazu Onishi; Yuko Matsushita

  The Astrophysical Journal American Astronomical Society 958 (2) 102 - 102 0004-637X 2023/11 [Invited]
  
• ALMA Observations of Supernova Remnant N49 in the Large Magellanic Cloud. II. Non-LTE Analysis of Shock-heated Molecular Clouds

  Sano, H.; Yamane, Y.; van Loon, J.Th; Furuya, K.; Fukui, Y.; Alsaberi, R.Z.E.; Bamba, A.; Enokiya, R.; Filipovi?, M.D.; Indebetouw, R.; Inoue, T.; Kawamura, A.; Laki?evi?, M.; Law, C.J.; Mizuno, N.; Murase, T.; Onishi, T.; Park, S.; Plucinsky, P.P.; Rho, J.; Richards, A.M.S.; Rowell, G.; Sasaki, M.; Seok, J.; Sharda, P.; Staveley-Smith, L.; Suzuki, H.; Temim, T.; Tokuda, K.; Tsuge, K.; Tachihara, K.

  Astrophysical Journal 958 (1) 1538-4357 2023/11 [Refereed]
  
• 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

  Tokuda, K.; Fukaya, N.; Tachihara, K.; Omura, M.; Harada, N.; Nozaki, S.; Shoshi, A.; Machida, M.N.

  Astrophysical Journal Letters 956 (1) 2041-8213 2023/10 [Invited]
  
• Predicting reliable H₂ column density maps from molecular line data using machine learning

  Shimajiri, Y.; Kawanishi, Y.; Fujita, S.; Miyamoto, Y.; Ito, A.M.; Arzoumanian, D.; A; dr{\'e}, P.; Nishimura, A.; Tokuda, K.; Kaneko, H.; Takekawa, S.; Ueda, S.; Onishi, T.; Inoue, T.; Nishimoto, S.; Yoneda, R.

  Monthly Notices of the Royal Astronomical Society 526 (1) 1365-2966 2023/09 [Refereed]
  
• Survey of CH₃NH₂ and its Formation Process

  Suzuki, T.; Majumdar, L.; Goldsmith, P.F.; Tokuda, K.; Minamoto, H.; Ohishi, M.; Saito, M.; Hirota, T.; Nomura, H.; Oya, Y.

  Astrophysical Journal 954 (2) 1538-4357 2023/09 [Refereed]
  
• An ALMA Glimpse of Dense Molecular Filaments Associated with High-mass Protostellar Systems in the Large Magellanic Cloud

  Kazuki Tokuda; Naoto Harada; Kei E. I. Tanaka; Tsuyoshi Inoue; Takashi Shimonishi; Yichen Zhang; Marta Sewiło; Yuri Kunitoshi; Ayu Konishi; Yasuo Fukui; Akiko Kawamura; Toshikazu Onishi; Masahiro N. Machida

  The Astrophysical Journal American Astronomical Society 955 (1) 52 - 52 0004-637X 2023/09 [Invited]
  
• Metallicity Dependence of Molecular Cloud Hierarchical Structure at Early Evolutionary Stages

  Masato I. N. Kobayashi; Kazunari Iwasaki; Kengo Tomida; Tsuyoshi Inoue; Kazuyuki Omukai; Kazuki Tokuda

  The Astrophysical Journal American Astronomical Society 954 (1) 38 - 38 0004-637X 2023/08 [Invited]
  
• ACA CO(J = 2–1) Mapping of the Nearest Spiral Galaxy M33. I. Initial Results and Identification of Molecular Clouds

  Kazuyuki Muraoka; Ayu Konishi; Kazuki Tokuda; Hiroshi Kondo; Rie E. Miura; Tomoka Tosaki; Sachiko Onodera; Nario Kuno; Masato I. N. Kobayashi; Kisetsu Tsuge; Hidetoshi Sano; Naoya Kitano; Shinji Fujita; Atsushi Nishimura; Toshikazu Onishi; Kazuya Saigo; Rin I. Yamada; Fumika Demachi; Kengo Tachihara; Yasuo Fukui; Akiko Kawamura

  The Astrophysical Journal American Astronomical Society 953 (2) 164 - 164 0004-637X 2023/08
• Detection of a new molecular cloud in the LHAASO J2108+5157 region supporting a hadronic PeVatron scenario

  de la Fuente, Eduardo; Toledano-Juarez, Ivan; Kawata, Kazumasa; Trinidad, Miguel A.; Tafoya, Daniel; Sano, Hidetoshi; Tokuda, Kazuki; Nishimura, Atsushi; Onishi, Toshikazu; Sako, Takashi; Hona, Binita; Ohnishi, Munehiro; Takita, Masato

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 75 (3) 546 - 566 0004-6264 2023/06 [Refereed]
  
• An Unbiased CO Survey Toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. II. CO Cloud Catalog

  Takahiro Ohno; Kazuki Tokuda; Ayu Konishi; Takeru Matsumoto; Marta Sewiło; Hiroshi Kondo; Hidetoshi Sano; Kisetsu Tsuge; Sarolta Zahorecz; Nao Goto; Naslim Neelamkodan; Tony Wong; Hajime Fukushima; Tatsuya Takekoshi; Kazuyuki Muraoka; Akiko Kawamura; Kengo Tachihara; Yasuo Fukui; Toshikazu Onishi

  The Astrophysical Journal American Astronomical Society 949 (2) 63 - 63 0004-637X 2023/05 [Refereed]
  
• Crescent-shaped Molecular Outflow from the Intermediate-mass Protostar DK Cha Revealed by ALMA

  Naoto Harada; Kazuki Tokuda; Hayao Yamasaki; Asako Sato; Mitsuki Omura; Shingo Hirano; Toshikazu Onishi; Kengo Tachihara; Masahiro N. Machida

  The Astrophysical Journal American Astronomical Society 945 (1) 63 - 63 0004-637X 2023/03 [Refereed]
  
• Distance determination of molecular clouds in the first quadrant of the Galactic plane using deep learning: I. Method and results

  Shinji Fujita; Atsushi M Ito; Yusuke MIYAMOTO; Yasutomo Kawanishi; Kazufumi Torii; Yoshito SHIMAJIRI; Atsushi Nishimura; Kazuki Tokuda; Toshikazu Onishi; Hiroyuki Kaneko; Tsuyoshi Inoue; Shunya Takekawa; Mikito Kohno; Shota Ueda; Shimpei Nishimoto; Ryuki Yoneda; Kaoru Nishikawa; Daisuke Yoshida

  Publications of the Astronomical Society of Japan Oxford University Press ({OUP}) 75 (1) 279 - 295 0004-6264 2023/02 [Refereed]
  
• The First Detection of a Protostellar CO Outflow in the Small Magellanic Cloud with ALMA

  Kazuki Tokuda

  The Astrophysical Journal Letters American Astronomical Society 936 (1) L6 - L6 2041-8205 2022/09 [Refereed]
  
• Development of a high-speed identification model for infrared-ring structures using deep learning

  Shimpei Nishimoto; Shota Ueda; Shinji Fujita; Atsushi Nishimura; Toshikazu Onishi; Kazuki Tokuda; Ryuki Yoneda; Yoshito Shimajiri; Yusuke Miyamoto; Yasutomo Kawanishi; Atsushi M. Ito; Kaoru Nishikawa; Daisuke Yoshida; Hiroyuki Kaneko; Tsuyoshi Inoue; Shunya Takekawa; Shuyo Nakatani

  Software and Cyberinfrastructure for Astronomy VII SPIE 2022/08
• Structural and Dynamical Analysis of the Quiescent Molecular Ridge in the Large Magellanic Cloud

  Molly K. Finn; Remy Indebetouw; Kelsey E. Johnson; Allison H. Costa; C.-H. Rosie Chen; Akiko Kawamura; Toshikazu Onishi; Jürgen O.; Marta Sewi{\l}o; Kazuki Tokuda; Tony Wong; Sarolta Zahorecz

  The Astronomical Journal American Astronomical Society 164 (2) 64 - 64 0004-6256 2022/08 [Refereed]
  
• 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

  Kazuki Tokuda; Taisei Minami; Yasuo Fukui; Tsuyoshi Inoue; Takeru Nishioka; Kisetsu Tsuge; Sarolta Zahorecz; Hidetoshi Sano; Ayu Konishi; C.-H. Rosie Chen; Marta Sewi{\l}o; Suzanne C. Madden; Omnarayani Nayak; Kazuya Saigo; Atsushi Nishimura; Kei E. I. Tanaka; Tsuyoshi Sawada; Remy Indebetouw; Kengo Tachihara; Akiko Kawamura; Toshikazu Onishi

  The Astrophysical Journal American Astronomical Society 933 (1) 20 - 20 0004-637X 2022/07 [Refereed]
  
• 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 Structures

  Tony Wong; Luuk Oudshoorn; Eliyahu Sofovich; Alex Green; Charmi Shah; R{\'{e } }my Indebetouw; Margaret Meixner; Alvaro Hacar; Omnarayani Nayak; Kazuki Tokuda; Alberto D. Bolatto; M{\'{e } }lanie Chevance; Guido De Marchi; Yasuo Fukui; Alec S. Hirschauer; K. E. Jameson; Venu Kalari; Vianney Lebouteiller; Leslie W. Looney; Suzanne C. Madden; Toshikazu Onishi; Julia Roman-Duval; M{\'{o } }nica Rubio; A. G. G. M. Tielens

  The Astrophysical Journal American Astronomical Society 932 (1) 47 - 47 0004-637X 2022/06 [Refereed]
  
• ALMA Observations of Molecular Complexity in the Large Magellanic Cloud: The N 105 Star-forming Region

  Marta Sewi{\l}o; Martin Cordiner; Steven B. Charnley; Joana M. Oliveira; Emmanuel Garcia-Berrios; Peter Schilke; Jacob L. Ward; Jennifer Wiseman; Remy Indebetouw; Kazuki Tokuda; Jacco Th; van Loon; A } }lvaro S{\'{a } }nchez-Monge; Veronica Allen; C.-H. Rosie Chen; Roya Hamedani Golshan; Agata Karska; Lars E. Kristensen; Stan E. Kurtz; Thomas Möller; Toshikazu Onishi; Sarolta Zahorecz

  The Astrophysical Journal American Astronomical Society 931 (2) 102 - 102 0004-637X 2022/06 [Refereed]
  
• A Study of Photoionized Gas in Two H ii Regions of the N44 Complex in the LMC Using MUSE Observations

  Susmita Barman; Naslim Neelamkodan; Suzanne C. Madden; Marta Sewilo; Francisca Kemper; Kazuki Tokuda; Soma Sanyal; Toshikazu Onishi

  The Astrophysical Journal American Astronomical Society 930 (2) 100 - 100 0004-637X 2022/05 [Refereed]
  
• Discovery of a Giant Molecular Loop in the Central Region of NGC 253

  Kazuki Tokuda

  The Astrophysical Journal American Astronomical Society 929 (1) 63 - 63 0004-637X 2022/04 [Refereed]
  
• Nobeyama 45 m Local Spur CO survey. I. Giant molecular filaments and cluster formation in the Vulpecula OB association

  Mikito Kohno; Atsushi Nishimura; Shinji Fujita; Kengo Tachihara; Toshikazu Onishi; Kazuki Tokuda; Yasuo Fukui; Yusuke Miyamoto; Shota Ueda; Ryosuke Kiridoshi; Daichi Tsutsumi; Kazufumi Torii; Tetsuhiro Minamidani; Kazuya Saigo; Toshihiro H; a; Hidetoshi Sano

  Publications of the Astronomical Society of Japan Oxford University Press ({OUP}) 74 (1) 24 - 49 0004-6264 2022/02 [Refereed]
  
• An Unbiased CO Survey toward the Northern Region of the Small Magellanic Cloud with the Atacama Compact Array. I. Overview: CO Cloud Distributions

  Kazuki Tokuda; Hiroshi Kondo; Takahiro Ohno; Ayu Konishi; Hidetoshi Sano; Kisetsu Tsuge; Sarolta Zahorecz; Nao Goto; Naslim Neelamkodan; Tony Wong; Marta Sewi{\l}o; Hajime Fukushima; Tatsuya Takekoshi; Kazuyuki Muraoka; Akiko Kawamura; Kengo Tachihara; Yasuo Fukui; Toshikazu Onishi

  The Astrophysical Journal American Astronomical Society 922 (2) 171 - 171 0004-637X 2021/12 [Refereed]
  
• First extragalactic measurement of the turbulence driving parameter: ALMA observations of the star-forming region N159E in the Large Magellanic Cloud

  Piyush Sharda; Shyam H Menon; Christoph Federrath; Mark R Krumholz; James R Beattie; Katherine E Jameson; Kazuki Tokuda; Blakesley Burkhart; Rol; M Crocker; Charles J Law; Amit Seta; Terrance J Gaetz; Nickolas M Pingel; Ivo R Seitenzahl; Hidetoshi Sano; Yasuo Fukui

  Monthly Notices of the Royal Astronomical Society Oxford University Press ({OUP}) 0035-8711 2021/10 [Refereed]
  
• ALMA CO Observations of the Mixed-morphology Supernova Remnant W49B: Efficient Production of Recombining Plasma and Hadronic Gamma Rays via Shock–Cloud Interactions

  H. Sano; S. Yoshiike; Y. Yamane; K. Hayashi; R. Enokiya; K. Tokuda; K. Tachihara; G. Rowell; M. D. Filipovi{\'{c } }; Y. Fukui

  The Astrophysical Journal American Astronomical Society 919 (2) 123 - 123 0004-637X 2021/10 [Refereed]
  
• Associated Molecular and Atomic Clouds with X-Ray Shell of Superbubble 30 Doradus C in the LMC

  Y. Yamane; H. Sano; M. D. Filipovi{\'{c } }; K. Tokuda; K. Fujii; Y. Babazaki; I. Mitsuishi; T. Inoue; F. Aharonian; T. Inaba; S. Inutsuka; N. Maxted; N. Mizuno; T. Onishi; G. Rowell; K. Tsuge; F. Voisin; S. Yoshiike; T. Fukuda; A. Kawamura; A. Bamba; K. Tachihara; Y. Fukui

  The Astrophysical Journal American Astronomical Society 918 (1) 36 - 36 0004-637X 2021/09 [Refereed]
  
• Physical Conditions in the LMC’s Quiescent Molecular Ridge: Fitting Non-LTE Models to CO Emission

  Molly K. Finn; Remy Indebetouw; Kelsey E. Johnson; Allison H. Costa; C.-H. Rosie Chen; Akiko Kawamura; Toshikazu Onishi; Jürgen O.; Kazuki Tokuda; Tony Wong; Sarolta Zahorecz

  The Astrophysical Journal American Astronomical Society 917 (2) 106 - 106 0004-637X 2021/08 [Refereed]
  
• ALMA Observations of Giant Molecular Clouds in M33. III. Spatially Resolved Features of the Star formation Inactive Million-solar-mass Cloud

  Hiroshi Kondo; Kazuki Tokuda; Kazuyuki Muraoka; Atsushi Nishimura; Shinji Fujita; Tomoka Tosaki; Sarolta Zahorecz; Rie E. Miura; Masato I. N. Kobayashi; Sachiko Onodera; Kazufumi Torii; Nario Kuno; Hidetoshi Sano; Toshikazu Onishi; Kazuya Saigo; Yasuo Fukui; Akiko Kawamura; Kisetsu Tsuge; Kengo Tachihara

  The Astrophysical Journal American Astronomical Society 912 (1) 66 - 66 0004-637X 2021/05 [Refereed]
  
• The formation of the young massive cluster B1 in the Antennae Galaxies (NGC 4038/NGC 4039) triggered by cloud–cloud collision

  Kisetsu Tsuge; Kengo Tachihara; Yasuo Fukui; Hidetoshi Sano; Kazuki Tokuda; Junko Ueda; Daisuke Iono

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 73 (2) 417 - 430 0004-6264 2021/04 [Refereed]
  
• ALMA view of the Galactic super star cluster RCW 38 at 270 au resolution

  Kazufumi Torii; Kazuki Tokuda; Kengo Tachihara; Toshikazu Onishi; Yasuo Fukui

  Publications of the Astronomical Society of Japan Oxford University Press ({OUP}) 73 (1) 205 - 219 0004-6264 2021/02 [Refereed]
  
• ALMA Reveals a Cloud–Cloud Collision that Triggers Star Formation in the Small Magellanic Cloud

  Naslim Neelamkodan; Kazuki Tokuda; Susmita Barman; Hiroshi Kondo; Hidetoshi Sano; Toshikazu Onishi

  The Astrophysical Journal Letters American Astronomical Society 908 (2) L43 - L43 2041-8205 2021/02
• Exploring the evolution of giant molecular clouds in one of the nearest spiral galaxies M33

  Konishi, A.; Muraoka, K.; Tokuda, K.; Fujita, S.; Yamada, R.I.; Demachi, F.; Tachihara, K.; Fukui, Y.; Kobayashi, M.I.N.; Kisetsu, T.; Kawamura, A.; Onishi, T.

  Proceedings of the International Astronomical Union 17 1743-9221 2021
• ALMA resolved views of molecular filaments/clumps in the Large Magellanic Cloud: A possible gas flow penetrating one of the most massive protocluster systems in the Local Group

  Tokuda, K.

  Proceedings of the International Astronomical Union 17 1743-9221 2021
• Identification of infrared-ring structures by convolutional neural network

  Shota Ueda; Shinji Fujita; Atsushi Nishimura; Toshikazu Onishi; Yoshito Shimajiri; Yusuke Miyamoto; Kazufumi Torii; Atsushi M. Ito; Shunya Takekawa; Hiroyuki Kaneko; Daisuke Yoshida; Taro Matsuo; Tsuyoshi Inoue; Yasutomo Kawanishi; Kazuki Tokuda

  Software and Cyberinfrastructure for Astronomy VI SPIE 2020/12
• Current status and future plan of Osaka Prefecture University 1.85-m mm-submm telescope project

  Atsushi Nishimura; Kazuki Tokuda; Ryohei Harada; Yutaka Hasegawa; Shota Ueda; Sho Masui; Ryotaro Konishi; Yasumasa Yamasaki; Hiroshi Kondo; Koki Yokoyama; Takeru Matsumoto; Taisei Minami; Masanari Okawa; Shinji Fujita; Ayu Konishi; Yuka Nakao; Shimpei Nishimoto; Sana Kawashita; Sho Yoneyama; Tatsuyuki Takashima; Kenta Goto; Nozomi Okada; Kimihiro Kimura; Yasuhiro Abe; Kazuyuki Muraoka; Hiroyuki Maezawa; Toshikazu Onishi; Hideo Ogawa

  Ground-based and Airborne Telescopes VIII SPIE 2020/12
• ALMA CO Observations of the Gamma-Ray Supernova Remnant RX J1713.7–3946: Discovery of Shocked Molecular Cloudlets and Filaments at 0.01 pc Scales

  H. Sano; T. Inoue; K. Tokuda; T. Tanaka; R. Yamazaki; S. Inutsuka; F. Aharonian; G. Rowell; M. D. Filipović; Y. Yamane; S. Yoshiike; N. Maxted; H. Uchida; T. Hayakawa; K. Tachihara; Y. Uchiyama; Y. Fukui

  The Astrophysical Journal American Astronomical Society 904 (2) L24 - L24 2041-8213 2020/11 [Refereed]
  
• ALMA Observations of Giant Molecular Clouds in M33. II. Triggered High-mass Star Formation by Multiple Gas Colliding Events at the NGC 604 Complex

  Kazuyuki Muraoka; Hiroshi Kondo; Kazuki Tokuda; Atsushi Nishimura; Rie E. Miura; Sachiko Onodera; Nario Kuno; Sarolta Zahorecz; Kisetsu Tsuge; Hidetoshi Sano; Shinji Fujita; Toshikazu Onishi; Kazuya Saigo; Kengo Tachihara; Yasuo Fukui; Akiko Kawamura

  The Astrophysical Journal American Astronomical Society 903 (2) 94 - 94 1538-4357 2020/11 [Refereed]
  
• ALMA Observations of HCO+ and HCN Emission in the Massive Star-forming Region N55 of the Large Magellanic Cloud

  Nayana A. J.; Naslim N.; T. Onishi; F. Kemper; K. Tokuda; S. C. Madden; O. Morata; S. Nasri; M. Galametz

  The Astrophysical Journal American Astronomical Society 902 (2) 140 - 140 1538-4357 2020/10 [Refereed]
  
• ALMA CO Observations of Gamma-Ray Supernova Remnant N132D in the Large Magellanic Cloud: Possible Evidence for Shocked Molecular Clouds Illuminated by Cosmic-Ray Protons

  H. Sano; P. P. Plucinsky; A. Bamba; P. Sharda; M. D. Filipovi{\'{c; C. J. Law; R. Z. E. Alsaberi; Y. Yamane; K. Tokuda; F. Acero; M. Sasaki; J. Vink; T. Inoue; S. Inutsuka; J. Shimoda; K. Tsuge; K. Fujii; F. Voisin; N. Maxted; G. Rowell; T. Onishi; A. Kawamura; N. Mizuno; H. Yamamoto; K. Tachihara; Y. Fukui

  The Astrophysical Journal American Astronomical Society 902 (1) 53 - 53 1538-4357 2020/10 [Refereed]
  
• FRagmentation and Evolution of Dense Cores Judged by ALMA (FREJA). I. Overview: Inner ∼1000 au Structures of Prestellar/Protostellar Cores in Taurus

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2020/08 [Refereed]
  
• A Low-velocity Bipolar Outflow from a Deeply Embedded Object in Taurus Revealed by the Atacama Compact Array

  Kazuki Tokuda

  The Astrophysical Journal American Astronomical Society 899 (1) L10 - L10 2041-8213 2020/08 [Refereed]
  
• Chemical Composition in the IRAS 16562–3959 High-mass Star-forming Region

  Kotomi Taniguchi; Andrés E. Guzmán; Liton Majumdar; Masao Saito; Kazuki Tokuda

  The Astrophysical Journal American Astronomical Society 898 (1) 54 - 54 1538-4357 2020/07 [Refereed]
  
• ALMA CO observations of a giant molecular cloud in M 33: Evidence for high-mass star formation triggered by cloud–cloud collisions

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 2053-051X 2020/06 [Refereed]
  
• ALMA Observations of Giant Molecular Clouds in M33. I. Resolving Star Formation Activities in the Giant Molecular Filaments Possibly Formed by a Spiral Shock

  Kazuki Tokuda

  The Astrophysical Journal American Astronomical Society 896 (1) 36 - 36 1538-4357 2020/06 [Refereed]
  
• The formation of young massive clusters triggered by cloud–cloud collisions in the Antennae galaxies NGC 4038/NGC 4039

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan 0004-6264 2020/06 [Refereed]
  
• FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). VI. Dense gas and mini-starbursts in the W 43 giant molecular cloud complex

  Mikito Kohno; Kengo Tachihara; Kazufumi Torii; Shinji Fujita; Atsushi Nishimura; Nario Kuno; Tomofumi Umemoto; Tetsuhiro Minamidani; Mitsuhiro Matsuo; Ryosuke Kiridoshi; Kazuki Tokuda; Misaki Hanaoka; Yuya Tsuda; Mika Kuriki; Akio Ohama; Hidetoshi Sano; Tetsuo Hasegawa; Yoshiaki Sofue; Asao Habe; Toshikazu Onishi; Yasuo Fukui

  Publications of the Astronomical Society of Japan Oxford University Press (OUP) 0004-6264 2020/05
• Development of a 22/43 GHz-band quasi-optical perforated plate and dual-band observation system of the Nobeyama 45 m telescope

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan 2053-051X 2020/02 [Refereed]
  
• FOREST Unbiased Galactic Plane Imaging Survey with the Nobeyama 45 m telescope (FUGIN). V. Dense gas mass fraction of molecular gas in the Galactic plane

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan 2053-051X 2019/12 [Refereed]
  
• An ALMA View of Molecular Filaments in the Large Magellanic Cloud. II. An Early Stage of High-mass Star Formation Embedded at Colliding Clouds in N159W-South

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2019/11 [Refereed]
  
• An ALMA View of Molecular Filaments in the Large Magellanic Cloud. I. The Formation of High-mass Stars and Pillars in the N159E-Papillon Nebula Triggered by a Cloud–Cloud Collision

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2019/11 [Refereed]
  
• Relations between Molecular Cloud Structure Sizes and Line Widths in the Large Magellanic Cloud

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2019/10 [Refereed]
  
• Nobeyama 45 m Cygnus-X CO Survey. II. Physical Properties of C18O Clumps

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2019/09 [Refereed]
  
• Discovery of Shocked Molecular Clouds Associated with the Shell-type Supernova Remnant RX J0046.5−7308 in the Small Magellanic Cloud

  H. Sano; H. Matsumura; Y. Yamane; P. Maggi; K. Fujii; K. Tsuge; K. Tokuda; R. Z. E. Alsaberi; M. D. Filipović; N. Maxted; G. Rowell; H. Uchida; T. Tanaka; K. Muraoka; T. Takekoshi; T. Onishi; A. Kawamura; T. Minamidani; N. Mizuno; H. Yamamoto; K. Tachihara; T. Inoue; S. Inutsuka; F. Voisin; N. F. H. Tothill; M. Sasaki; N. M. McClure-Griffiths; Y. Fukui

  The Astrophysical Journal American Astronomical Society 881 (1) 85 - 85 1538-4357 2019/08 [Refereed]
  
• A centrally concentrated sub-solar-mass starless core in the Taurus L1495 filamentary complex

  Kazuki Tokuda; Kengo Tachihara; Kazuya Saigo; Phillipe Andre; Yosuke Miyamoto; Sarolta Zahorecz; Shu-ichiro Inutsuka; Tomoaki Matsumoto; Tatsuyuki Takashima; Masahiro N. Machida; Kengo Tomida; Kotomi Taniguchi; Yasuo Fukui; Akiko Kawamura; Ken'ichi Tatematsu; Ryo Kandori; Toshikazu Onishi

  PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN OXFORD UNIV PRESS 71 (4) 0004-6264 2019/08 [Refereed]
  
• Formation of high-mass stars in an isolated environment in the Large Magellanic Cloud

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan 0004-6264 2019/04 [Refereed]
  
• ALMA CO Observations of Supernova Remnant N63A in the Large Magellanic Cloud: Discovery of Dense Molecular Clouds Embedded within Shock-ionized and Photoionized Nebulae

  H. Sano; H. Matsumura; T. Nagaya; Y. Yamane; R. Z. E. Alsaberi; M. D. Filipović; K. Tachihara; K. Fujii; K. Tokuda; K. Tsuge; S. Yoshiike; T. Onishi; A. Kawamura; T. Minamidani; N. Mizuno; H. Yamamoto; S. Inutsuka; T. Inoue; N. Maxted; G. Rowell; M. Sasaki; Y. Fukui

  The Astrophysical Journal American Astronomical Society 873 (1) 40 - 40 1538-4357 2019/03 [Refereed]
  
• Molecular Clouds Associated with the Type Ia SNR N103B in the Large Magellanic Cloud

  H. Sano; Y. Yamane; K. Tokuda; K. Fujii; K. Tsuge; T. Nagaya; S. Yoshiike; M. D. Filipović; R. Z. E. Alsaberi; L. Barnes; T. Onishi; A. Kawamura; T. Minamidani; N. Mizuno; H. Yamamoto; K. Tachihara; N. Maxted; F. Voisin; G. Rowell; H. Yamaguchi; Y. Fukui

  The Astrophysical Journal American Astronomical Society 867 (1) 7 - 7 1538-4357 2018/10 [Refereed]
  
• ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells

  Y. Yamane; H. Sano; J. Th. van Loon; M. D. Filipović; K. Fujii; K. Tokuda; K. Tsuge; T. Nagaya; S. Yoshiike; K. Grieve; F. Voisin; G. Rowell; R. Indebetouw; M. Lakićević; T. Temim; L. Staveley-Smith; J. Rho; K. S. Long; S. Park; J. Seok; N. Mizuno; A. Kawamura; T. Onishi; T. Inoue; S. Inutsuka; K. Tachihara; Y. Fukui

  The Astrophysical Journal American Astronomical Society 863 (1) 55 - 55 1538-4357 2018/08 [Refereed]
  
• Warm CO Gas Generated by Possible Turbulent Shocks in a Low-mass Star-forming Dense Core in Taurus

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2018/07 [Refereed]
  
• Nobeyama 45 m Cygnus-X CO Survey. I. Photodissociation of Molecules Revealed by the Unbiased Large-scale CN and C18O Maps

  Kazuki Tokuda

  The Astrophysical Journal Supplement Series American Astronomical Society 235 (1) 9 - 9 1538-4365 2018/03 [Refereed]
  
• Molecular Cloud Structures and Massive Star Formation in N159

  O. Nayak; M. Meixner; Y. Fukui; K. Tachihara; T. Onishi; K. Saigo; K. Tokuda; R. Harada

  Astrophysical Journal Institute of Physics Publishing 854 (2) 1538-4357 2018/02 [Refereed]
  
• ALMA Reveals Molecular Cloud N55 in the Large Magellanic Cloud as a Site of Massive Star Formation

  N. Naslim; K. Tokuda; T. Onishi; F. Kemper; T. Wong; O. Morata; S. Takada; R. Harada; A. Kawamura; K. Saigo; R. Indebetouw; S. C. Madden; S. Hony; M. Meixner

  Astrophysical Journal Institute of Physics Publishing 853 (2) 1538-4357 2018/02 [Refereed]
  
• ALMA Observations of a Quiescent Molecular Cloud in the Large Magellanic Cloud

  Tony Wong; Annie Hughes; Kazuki Tokuda; Rémy Indebetouw; Jean-Philippe Bernard; Toshikazu Onishi; Evan Wojciechowski; Jeffrey B. Bandurski; Akiko Kawamura; Julia Roman-Duval; Yixian Cao; C.-H. Rosie Chen; You-Hua Chu; Chaoyue Cui; Yasuo Fukui; Ludovic Montier; Erik Muller; Juergen Ott; Deborah Paradis; Jorge L. Pineda; Erik Rosolowsky; Marta Sewiło

  Astrophysical Journal Institute of Physics Publishing 850 (2) 1538-4357 2017/12 [Refereed]
  
• Observational demonstration of a high image rejection SIS mixer receiver using a new waveguide filter at 230 GHz

  Kazuki Tokuda

  Publications of the Astronomical Society of Japan 0004-6264 2017/12 [Refereed]
  
• A Detached Protostellar Disk around a ∼0.2M⊙Protostar in a Possible Site of a Multiple Star Formation in a Dynamical Environment in Taurus

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2017/11 [Refereed]
  
• A Detached Protostellar Disk around a similar to 0.2M(circle dot) Protostar in a Possible Site of a Multiple Star Formation in a Dynamical Environment in Taurus

  Kazuki Tokuda; Toshikazu Onishi; Kazuya Saigo; Takashi Hosokawa; Tomoaki Matsumoto; Shu-ichiro Inutsuka; Masahiro N. Machida; Kengo Tomida; Masanobu Kunitomo; Akiko Kawamura; Yasuo Fukui; Kengo Tachihara

  ASTROPHYSICAL JOURNAL IOP PUBLISHING LTD 849 (2) 0004-637X 2017/11 [Refereed]
  
• FOREST unbiased Galactic plane imaging survey with the Nobeyama 45 m telescope (FUGIN). I. Project overview and initial results

  Tomofumi Umemoto; Tetsuhiro Minamidani; Nario Kuno; Shinji Fujita; Mitsuhiro Matsuo; Atsushi Nishimura; Kazufumi Torii; Tomoka Tosaki; Mikito Kohno; Mika Kuriki; Yuya Tsuda; Akihiko Hirota; Satoshi Ohashi; Mitsuyoshi Yamagishi; Toshihiro Handa; Hiroyuki Nakanishi; Toshihiro Omodaka; Nagito Koide; Naoko Matsumoto; Toshikazu Onishi; Kazuki Tokuda; Masumichi Seta; Yukinori Kobayashi; Kengo Tachihara; Hidetoshi Sano; Yusuke Hattori; Sachiko Onodera; Yumiko Oasa; Kazuhisa Kamegai; Masato Tsuboi; Yoshiaki Sofue; Aya E. Higuchi; James O. Chibueze; Norikazu Mizuno; Mareki Honma; Erik Muller; Tsuyoshi Inoue; Kana Morokuma-Matsui; Hiroko Shinnaga; Takeaki Ozawa; Ryo Takahashi; Satoshi Yoshiike; Jean Costes; Sho Kuwahara

  PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN OXFORD UNIV PRESS 69 (5) 0004-6264 2017/10 [Refereed]
  
• ALMA Observations of N83C in the Early Stage of Star Formation in the Small Magellanic Cloud

  Kazuyuki Muraoka; Aya Homma; Toshikazu Onishi; Kazuki Tokuda; Ryohei Harada; Yuuki Morioka; Sarolta Zahorecz; Kazuya Saigo; Akiko Kawamura; Norikazu Mizuno; Tetsuhiro Minamidani; Erik Muller; Yasuo Fukui; Margaret Meixner; Remy Indebetouw; Marta Sewilo; Alberto Bolatto

  ASTROPHYSICAL JOURNAL IOP PUBLISHING LTD 844 (2) 98  0004-637X 2017/08 [Refereed]
  
• ALMA Observations of N83C in the Early Stage of Star Formation in the Small Magellanic Cloud

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2017/07 [Refereed]
  
• A Massive Molecular Outflow in the Dense Dust Core AGAL G337.916-00.477

  Kazufumi Torii; Yusuke Hattori; Keisuke Hasegawa; Akio Ohama; Hiroaki Yamamoto; Kengo Tachihara; Kazuki Tokuda; Toshikazu Onishi; Yasuki Hattori; Daisuke Ishihara; Hidehiro Kaneda; Yasuo Fukui

  Astrophysical Journal Institute of Physics Publishing 840 (2) 1538-4357 2017/05 [Refereed]
  
• A New Approach to Suppress the Effect of Machining Error for Waveguide Septum Circular Polarizer at 230 GHz Band in Radio Astronomy

  Yutaka Hasegawa; Ryohei Harada; Kazuki Tokuda; Kimihiro Kimura; Hideo Ogawa; Toshikazu Onishi; Atsushi Nishimura; Johnson Han; Makoto Inoue

  JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES SPRINGER 38 (5) 638 - 652 1866-6892 2017/05 [Refereed]
  
• A Massive Molecular Outflow in the Dense Dust Core AGAL G337.916-00.477

  Kazufumi Torii; Yusuke Hattori; Keisuke Hasegawa; Akio Ohama; Hiroaki Yamamoto; Kengo Tachihara; Kazuki Tokuda; Toshikazu Onishi; Yasuki Hattori; Daisuke Ishihara; Hidehiro Kaneda; Yasuo Fukui

  ASTROPHYSICAL JOURNAL IOP PUBLISHING LTD 840 (2) 0004-637X 2017/05 [Refereed]
  
• KINEMATIC STRUCTURE of MOLECULAR GAS AROUND HIGH-MASS YSO, PAPILLON NEBULA, in N159 EAST in the LARGE MAGELLANIC CLOUD: A NEW PERSPECTIVE with ALMA

  Kazuya Saigo; Toshikazu Onishi; Omnarayani Nayak; Margaret Meixner; Kazuki Tokuda; Ryohei Harada; Yuuki Morioka; Marta Sewiło; Remy Indebetouw; Kazufumi Torii; Akiko Kawamura; Akio Ohama; Yusuke Hattori; Hiroaki Yamamoto; Kengo Tachihara; Tetsuhiro Minamidani; Tsuyoshi Inoue; Suzanne Madden; Maud Galametz; Vianney Lebouteiller; C.-H. Rosie Chen; Norikazu Mizuno; Yasuo Fukui

  Astrophysical Journal Institute of Physics Publishing 835 (1) 1538-4357 2017/01 [Refereed]
  
• KINEMATIC STRUCTURE OF MOLECULAR GAS AROUND HIGH-MASS YSO, PAPILLON NEBULA, IN N159 EAST IN THE LARGE MAGELLANIC CLOUD: A NEW PERSPECTIVE WITH ALMA

  Kazuya Saigo; Toshikazu Onishi; Omnarayani Nayak; Margaret Meixner; Kazuki Tokuda; Ryohei Harada; Yuuki Morioka; Marta Sewilo; Remy Indebetouw; Kazufumi Torii; Akiko Kawamura; Akio Ohama; Yusuke Hattori; Hiroaki Yamamoto; Kengo Tachihara; Tetsuhiro Minamidani; Tsuyoshi Inoue; Suzanne Madden; Maud Galametz; Vianney Lebouteiller; C. -H. Rosie Chen; Norikazu Mizuno; Yasuo Fukui

  ASTROPHYSICAL JOURNAL IOP PUBLISHING LTD 835 (1) 0004-637X 2017/01 [Refereed]
  
• REVEALING A DETAILED MASS DISTRIBUTION OF A HIGH-DENSITY CORE MC27/L1521F IN TAURUS WITH ALMA

  Kazuki Tokuda

  The Astrophysical Journal 1538-4357 2016/07 [Refereed]
  
• REVEALING A DETAILED MASS DISTRIBUTION OF A HIGH-DENSITY CORE MC27/L1521F IN TAURUS WITH ALMA

  Kazuki Tokuda; Toshikazu Onishi; Tomoaki Matsumoto; Kazuya Saigo; Akiko Kawamura; Yasuo Fukui; Shu-ichiro Inutsuka; Masahiro N. Machida; Kengo Tomida; Kengo Tachihara; Philippe Andre

  ASTROPHYSICAL JOURNAL IOP PUBLISHING LTD 826 (1) 0004-637X 2016/07 [Refereed]
  
• Star formation in Taurus Auriga Perseus and California nebulae

  L. Viktor Toth; Sarolta Zahorecz; Gabor Marton; Yasuo Doi; Toshikazu Onishi; Kazuki Tokuda

  FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? CAMBRIDGE UNIV PRESS (315) 1743-9213 2016
• Investigating formation of isolated intermediate/massive YSOs in the LMC

  Ryohei Harada; Toshikazu Onishi; Annie Hughes; Margaret Meixner; Marta Sewilo; Remy Indebetouw; Omnarayani Nayak; Kazuki Tokuda; Yuuki Morioka; Yasuo Fukui; Akiko Kawamura; Tony Wong; Jean-Philippe Bernard

  FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? CAMBRIDGE UNIV PRESS (315) 1743-9213 2016 [Refereed]
  
• Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope

  Fumitaka Nakamura; Hideo Ogawa; Yoshinori Yonekura; Kimihiko Kimura; Nozomi Okada; Minato Kozu; Yutaka Hasegawa; Kazuki Tokuda; Tetsu Ochiai; Izumi Mizuno; Kazuhito Dobashi; Tomomi Shimoikura; Seiji Kameno; Kotomi Taniguchi; Hiroko Shinnaga; Shuro Takano; Ryohei Kawabe; Taku Nakajima; Daisuke Iono; Nario Kuno; Toshikazu Onishi; Munetake Momose; Satoshi Yamamoto

  PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN OXFORD UNIV PRESS 67 (6) 0004-6264 2015/12 [Refereed]
  
• HIGH-MASS STAR FORMATION TRIGGERED BY COLLISION BETWEEN CO FILAMENTS IN N159 WEST IN THE LARGE MAGELLANIC CLOUD

  Yasuo Fukui; Ryohei Harada; Kazuki Tokuda; Yuuki Morioka; Toshikazu Onishi; Kazufumi Torii; Akio Ohama; Yusuke Hattori; Omnarayani Nayak; Margaret Meixner; Marta Sewiło; Remy Indebetouw; Akiko Kawamura; Kazuya Saigo; Hiroaki Yamamoto; Kengo Tachihara; Tetsuhiro Minamidani; Tsuyoshi Inoue; Suzanna Madden; Maud Galametz; Vianney Lebouteiller; Norikazu Mizuno; C.-H. Rosie Chen

  Astrophysical Journal Letters Institute of Physics Publishing 807 (1) 2041-8213 2015/07 [Refereed]
  
• An origin of arc structures deeply embedded in dense molecular cloud cores

  Tomoaki Matsumoto; Toshikazu Onishi; Kazuki Tokuda; Shu-ichiro Inutsuka

  MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY OXFORD UNIV PRESS 449 (1) L123 - L127 0035-8711 2015/05 [Refereed]
  
• An origin of arc structures deeply embedded in dense molecular cloud cores

  Tomoaki Matsumoto; Toshikazu Onishi; Kazuki Tokuda; Shu-ichiro Inutsuka

  Monthly Notices of the Royal Astronomical Society: Letters Oxford University Press 449 (1) L123 - L127 1745-3933 2015/02 [Refereed]
  
• Cluster Formation Triggered by Filament Collisions in Serpens South

  Fumitka Nakamura; Tomohiro Tanaka; Yuya Awazu; Yoshito Shimajiri; Koji Sugitani; Ryohei Kawabe; Hiroyuki Nishitani; Kazuhito Dobashi; Tomomi Shimoikura; Yoshinori Yonekura; Izumi Mizuno; Kimihiko Kimura; Kazuki Tokuda; Minato Kozu; Nozomi Okada; Yutaka Hasegawa; Hideo Ogawa; Seiji Kameno; Hiroko Shinnaga; Munetake Momose; Taku Nakajima; Toshikazu Onishi; Hiroyuki Maezawa; Tomoya Hirota; Shuro Takano; Daisuke Iono; Nario Kuno; Satoshi Yamamoto

  REVOLUTION IN ASTRONOMY WITH ALMA: THE THIRD YEAR ASTRONOMICAL SOC PACIFIC 499 239 - 240 2041-8213 2015 [Refereed]
  
• REVEALING THE PHYSICAL PROPERTIES OF MOLECULAR GAS IN ORION WITH A LARGE-SCALE SURVEY INJ= 2-1 LINES OF12CO,13CO, AND C18O

  Kazuki Tokuda

  The Astrophysical Journal Supplement Series American Astronomical Society 216 (1) 18 - 18 1538-4365 2015/01 [Refereed]
  
• REVEALING THE PHYSICAL PROPERTIES OF MOLECULAR GAS IN ORION WITH A LARGE-SCALE SURVEY IN J=2-1 LINES OF (CO)-C-12, (CO)-C-13, AND (CO)-O-18

  Atsushi Nishimura; Kazuki Tokuda; Kimihiro Kimura; Kazuyuki Muraoka; Hiroyuki Maezawa; Hideo Ogawa; Kazuhito Dobashi; Tomomi Shimoikura; Akira Mizuno; Yasuo Fukui; Toshikazu Onishi

  ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES IOP PUBLISHING LTD 216 (1) 0067-0049 2015/01 [Refereed]
  
• Extensive Surveys of Dense Cores in Taurus in High Density Molecular Tracers

  Kazuki Tokuda; Shigeki Osald; Hiroyuki Maezawa; Toshikazu Onishi; Kazuya Saigo; Akiko Kawamura; Yasuo Fukui; Kengo Tachihara

  REVOLUTION IN ASTRONOMY WITH ALMA: THE THIRD YEAR ASTRONOMICAL SOC PACIFIC 499 193 - 194 2015 [Refereed]
  
• ALMA Observations of a High-density Core in Taurus: Dynamical Gas Interaction at the Possible Site of a Multiple Star Formation

  Toshikazu Onishi; Kazuki Tokuda; Kazuya Saigo; Akiko Kawamura; Yasuo Fukui; Tomoaki Matsumoto; Shu-ichiro Inutsuka; Masahiro Machida; Kengo Tomida; Kengo Tachihara

  REVOLUTION IN ASTRONOMY WITH ALMA: THE THIRD YEAR ASTRONOMICAL SOC PACIFIC 499 211 - 214 2015 [Refereed]
  
• ALMA Observations of a High-density Core in Taurus: Dynamical Gas Interaction at the Possible Site of a Multiple Star Formation

  Kazuki Tokuda; Toshikazu Onishi; Kazuya Saigo; Akiko Kawamura; Yasuo Fukui; Tomoaki Matsumoto; Shu-ichiro Inutsuka; Masahiro N. Machida; Kengo Tomida; Kengo Tachihara

  FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES? CAMBRIDGE UNIV PRESS (315) 1743-9213 2015 [Refereed]
  
• CLUSTER FORMATION TRIGGERED BY FILAMENT COLLISIONS IN SERPENS SOUTH

  Fumitaka Nakamura; Koji Sugitani; Tomohiro Tanaka; Hiroyuki Nishitani; Kazuhito Dobashi; Tomomi Shimoikura; Yoshito Shimajiri; Ryohei Kawabe; Yoshinori Yonekura; Izumi Mizuno; Kimihiko Kimura; Kazuki Tokuda; Minato Kozu; Nozomi Okada; Yutaka Hasegawa; Hideo Ogawa; Seiji Kameno; Hiroko Shinnaga; Munetake Momose; Taku Nakajima; Toshikazu Onishi; Hiroyuki Maezawa; Tomoya Hirota; Shuro Takano; Daisuke Iono; Nario Kuno; Satoshi Yamamoto

  ASTROPHYSICAL JOURNAL LETTERS IOP PUBLISHING LTD 791 (2) L23 - 308 2041-8205 2014/08 [Refereed]
  
• ALMA OBSERVATIONS OF A HIGH-DENSITY CORE IN TAURUS: DYNAMICAL GAS INTERACTION AT THE POSSIBLE SITE OF A MULTIPLE STAR FORMATION

  Kazuki Tokuda; Toshikazu Onishi; Kazuya Saigo; Akiko Kawamura; Yasuo Fukui; Tomoaki Matsumoto; Shu-ichiro Inutsuka; Masahiro N. Machida; Kengo Tomida; Kengo Tachihara

  ASTROPHYSICAL JOURNAL LETTERS IOP PUBLISHING LTD 789 (1) 2041-8205 2014/07 [Refereed]
  
• A 1.85-m mm-submm telescope for large-scale molecular gas surveys in 12CO, 13CO, and C18O (J = 2-1)

  Toshikazu Onishi; Atsushi Nishimura; Yuya Ota; Akio Hashizume; Yoshiharu Kojima; Akihito Minami; Kazuki Tokuda; Shiori Touga; Yasuhiro Abe; Masahiro Kaiden; Kimihiro Kimura; Kazuyuki Muraoka; Hiroyuki Maezawa; Hideo Ogawa; Kazuhito Dobashi; Tomomi Shimoikura; Yoshinori Yonekura; Shin'ichiro Asayama; Toshihiro Handa; Taku Nakajima; Takashi Noguchi; Nario Kuno

  Publications of the Astronomical Society of Japan Oxford University Press 65 (4) 0004-6264 2013/08 [Refereed]
  

MISC

• 野辺山45m鏡7BEE受信機によるオリオン座分子雲の観測(2)

  立松健一; 西村淳; 前川淳; 小川英夫; 大西利和; 長谷川豊; 山崎康正; 増井翔; 米山翔; 西本晋平; 中川凌; 西川悠馬; 藤巴一航; 酒井剛; 宮戸健; 坂井南美; 徳田一起; 宮澤千栄子; 高橋敏一; GONZALEZ Alvaro; 金子慶子; 小嶋崇文  日本天文学会年会講演予稿集  2024-  2024
• 野辺山45m鏡7BEE受信機によるM17 SW巨大分子雲の観測(1)

  西村淳; 立松健一; 徳田一起; 宮戸健; 酒井剛; 西川悠馬; 中川凌; 藤巴一航; 米山翔; 西本晋平; 山崎康正; 長谷川豊; 大西利和; 小川英夫; 坂井南美; 前川淳; 宮澤千栄子; 高橋敏一; 増井翔; GONZALEZ Alvaro; 金子慶子; 小嶋崇文  日本天文学会年会講演予稿集  2024-  2024
• 野辺山45m鏡を用いたおうし座分子雲コアの重水素化合物輝線による観測(2):B213W領域での高密度分子雲コアの重水素濃縮

  野崎信吾; 大村充輝; 所司歩夢; 原田直人; 佐藤亜紗子; 徳田一起; 小西亜侑; 國年悠里; 東野康祐; 松本健; 小川英夫; 長谷川豊; 大西利和; 坂井南美; YANG Yao-Lun; ZENG Shaoshan; 立原研悟; 立松健一; 西村淳  日本天文学会年会講演予稿集  2024-  2024
• 野辺山45m鏡を用いたおうし座分子雲コアの重水素化合物輝線による観測(1):プロジェクト概要と進捗状況

  徳田一起; 野崎信吾; 大村充輝; 所司歩夢; 原田直人; 佐藤亜紗子; 小西亜侑; 國年悠里; 東野康祐; 松本健; 小川英夫; 長谷川豊; 大西利和; 坂井南美; YANG Yao-Lun; ZENG Shaoshan; 立原研悟; 立松健一; 西村淳  日本天文学会年会講演予稿集  2024-  2024
• 野辺山45m鏡7BEE受信機によるオリオン座分子雲の観測(1)

  立松健一; 西村淳; 前川淳; 小川英夫; 大西利和; 長谷川豊; 山崎康正; 増井翔; 米山翔; 西本晋平; 中川凌; 西川悠馬; 藤巴一航; 酒井剛; 坂井南美; 徳田一起; 徳田一起; 宮澤千栄子; 高橋敏一; GONZALEZ Alvaro; 金子慶子; 小嶋崇文  日本天文学会年会講演予稿集  2023-  2023
• 野辺山45m Local Spur COサーベイ:こぎつね座OBアソシエーションにおける巨大フィラメント状分子雲と星団形成 II

  河野樹人; 西村淳; 藤田真司; 大西利和; 上田翔汰; 切通僚介; 徳田一起; 徳田一起; 立原研悟; 福井康雄; 堤大陸; 西合一矢; 宮本祐介; 南谷哲宏; 佐野栄俊; 半田利弘; 鳥居和史  日本天文学会年会講演予稿集  2022-  2022
• NRO Local Spur COサーベイプロジェクト:こぎつね座OBアソシエーションにおける巨大分子雲と星形成

  河野樹人; 西村淳; 藤田真司; 大西利和; 上田翔汰; 徳田一起; 徳田一起; 立原研悟; 福井康雄; 堤大陸; 西合一矢; 宮本祐介; 南谷哲宏; 佐野栄俊; 鳥居和史; 半田利弘  日本天文学会年会講演予稿集  2021-  2021
• NRO銀河面サーベイプロジェクト(FUGIN):巨大分子雲複合体W43における高密度ガスと大質量星形成シナリオ III

  河野樹人; 立原研悟; 藤田真司; 佐野栄俊; 花岡美咲; 大浜晶生; 福井康雄; 鳥居和史; 梅本智文; 松尾光洋; 久野成夫; 栗木美香; 徳田一起; 徳田一起; 切通僚介; 西村淳; 大西利和; 津田裕也; 南谷哲宏; 長谷川哲夫; 祖父江義明; 羽部朝男  日本天文学会年会講演予稿集  2020-  2020
• L1495領域のフィラメント雲に埋もれた褐色矮星前駆体候補の高密度コア

  徳田一起; SAROLTA Zahorecz; 立原研悟; 宮本洋輔; 福井康雄; 犬塚修一郎; PHILLIPE Andre; 西合一矢; 河村晶子; 立松健一; 松本倫明; 町田正博; 富田賢吾; 谷口琴美; 神鳥亮; 高嶋辰幸; 大西利加  日本天文学会年会講演予稿集  2019-  2019
• ALMA observations toward the TUKH122 prectellar core in the Orion A cloud

  大橋聡史; 坂井南美; 立松健一; SANHUEZA Patricio; 廣田朋也; 西合一矢; 泉奈都子; 徳田一起; 徳田一起; 大西利和  日本天文学会年会講演予稿集  2018-  2018
• NRO銀河面サーベイプロジェクト(FUGIN):爆発的星形成領域W43のCO輝線観測 I

  河野樹人; 立原研悟; 藤田真司; 西村淳; 大浜晶生; 福井康雄; 鳥居和史; 梅本智文; 南谷哲宏; 松尾光洋; 久野成夫; 栗木美香; 津田裕也; 徳田一起; 徳田一起; 切通僚介; 大西利和  日本天文学会年会講演予稿集  2018-  2018
• 小マゼラン雲中の高密度ダスト雲におけるコンパクトCOクランプの検出

  竹腰達哉; 河野孝太郎; 南谷哲宏; 川邊良平; 徳田一起; 徳田一起; 村岡和幸; 大西利和  日本天文学会年会講演予稿集  2018-  2018
• 野辺山45m Cygnus-X COサーベイ:2.C¹⁸O core properties

  竹腰達哉; 藤田真司; 西村淳; 谷口琴美; 山岸光義; 徳田一起; 松尾光洋; 南谷哲宏  日本天文学会年会講演予稿集  2017-  2017
• 野辺山45m Cygnus-X COサーベイ:1.DR21/W75N領域における分子雲衝突による星形成トリガーの可能性

  西村淳; 山岸光義; 松尾光洋; 藤田真司; 谷口琴美; 竹腰達哉; 南谷哲宏; 徳田一起  日本天文学会年会講演予稿集  2017-  2017
• 野辺山45m Cygnus-X COサーベイ:3.CNデータから探る分子の光解離反応

  山岸光義; 西村淳; 竹腰達哉; 南谷哲宏; 徳田一起; 谷口琴美; 松尾光洋; 藤田真司  日本天文学会年会講演予稿集  2017-  2017
• Theoretical Models of Protostellar Binary and Multiple Systems with AMR Simulations

  Tomoaki Matsumoto; Kazuki Tokuda; Toshikazu Onishi; Shu-Ichiro Inutsuka; Kazuya Saigo; Shigehisa Takakuwa  11TH INTERNATIONAL CONFERENCE ON NUMERICAL MODELING OF SPACE PLASMA FLOWS (ASTRONUM-2016)  837-  12009  2017
• Large-Scale Molecular Gas Survey in (CO)-C-12, (CO)-C-13 and C-18 O (J=2-1) with the Osaka 1.85m mm-submm Telescope

  Toshikazu Onishi; Atsushi Nishimura; Kazuki Tokuda; Ryohei Harada; Kazuhito Dobashi; Tomomi Shimoikura; Kimihiro Kimura; Hideo Ogawa  FROM INTERSTELLAR CLOUDS TO STAR-FORMING GALAXIES: UNIVERSAL PROCESSES?  315-  (315)  2016
• Large-Scale Molecular Gas Survey in 12CO, 13CO and C18O (J=2-1) with the Osaka 1.85m mm-submm Telescope

  Onishi, Toshikazu; Nishimura, Atsushi; Tokuda, Kazuki; Harada, Ryohei; Dobashi, Kazuhito; Shimoikura, Tomomi; Kimura, Kimihiro; Ogawa, Hideo  IAU General Assembly, Meeting  29-  (2252707)  2015/08
• NROレガシープロジェクト:銀河面COサーベイ

  梅本智文; 久野成夫; 廣田明彦; 南谷哲宏; 諸隈佳菜; 新永浩子; 本間希樹; 水野範和; 樋口あや; 半田利弘; 面高俊宏; 中西裕之; 松尾光洋; 小澤武揚; 大西利和; 西村淳; 徳田一起; 濤崎智佳; 小高大樹; 小野寺幸子; 祖父江義明; 津田裕也; 鳥居和史; 中島大智; 大橋聡史; 坪井昌人  日本天文学会年会講演予稿集  2013-  179  2013/08
• スーパージャイアントシェルLMC4内HII領域,N55に附随する分子雲と星形成

  河村晶子; 藤井浩介; 水野範和; 立松健一; 大西利和; 西村淳; 徳田一起; 福井康雄; 南谷哲宏  日本天文学会年会講演予稿集  2013-  2013

Research Grants & Projects

• The earliest stage of star formation to be studied by observing deuterated molecules

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

  Date (from‐to) : 2020/08 -2025/03 

  Author : 立松 健一; 坂井 南美; 酒井 剛; 小川 英夫; 徳田 一起

   

  本研究で製作している野辺山45m電波望遠鏡用の新7ビーム3帯域両偏波受信機は、順調に開発が進み、ほぼ完成の状態にある。2022年度前半に新型コロナの状況を見ながら、野辺山45m電波望遠鏡に搭載予定である。 野辺山45m電波望遠鏡と既設の4ビーム両サイドバンド両偏波受信機FORESTを用いて、JCMT望遠鏡搭載のサブミリ波カメラSCUBA-2で同定された分子雲コア107個を含む44領域のOn-the-Fly方式のマッピング観測を行った。野辺山45m電波望遠鏡による観測で重水素の割合が観測されているコア(Gwanjeong Kim, Ken'ichi Tatematsu, et al 2020)を中心に、82-94GHzの周波数帯に輝線のある分子N2H+、HC3N、およびCCSの輝線を観測した。N2H+分子およびHC3N分子の輝線の天球上での分布は、850μmのダスト連続波の分布に似ていることが明らかになった。CCS分子の輝線は、検出されないか、または、検出された場合は850μmのダスト連続波のピーク位置を取り巻くように分布しているということが明らかにされた。「星ありの分子雲コア」に関し、12％の分子雲コアで原始星の方向でCCSが検出されたが、これは原始星付近の高い励起によると考えられる。乱流の散逸は星形成の始動メカニズムの一つの候補と目されているが、分子雲コアの進化に従って非熱的速度分散が変化している様子は観測されなかった。このことは、星形成の始動条件として、乱流の散逸があまり効いていないことを示唆するのかもしれないと考えられる。
• 分子雲コア寿命の測定を通した星団形成機構の解明

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists

  Date (from‐to) : 2021/04 -2024/03 

  Author : 徳田 一起

   

  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。数1000 auという大きさは母体分子雲と比較すると非常にコンパクトではあるが、それでも原始星円盤のスケール(数 10~数100 au)よりも大きく、空間的に広がっている。そこで本研究ではまず、日本が開発したAtacama Compact Array (ACA)のみを用いた広域観測で、6秒角(1000 au)程度の空間解像度で分子雲コアの内部の密度構造をよく反映するミリ波・サブミリ波帯の連続波および、速度構造や化 学的特徴を調べるための分子輝線観測を行う。1年目は既にデータが得られつつある南のかんむり座領域のデータ解析に注力した。その結果、分子雲コアの最も密度の高い部分を反映すると考えられる1.3mm帯連続波を解析した。その結果、おうし座領域に存在する分子雲コアに比べてより小さい領域で複数個に分裂していると思われる構造が多数明らかになってきた。
• 低金属量環境下における分子ガス雲トレーサーとしての一酸化炭素分子輝線の挙動解明

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

  Date (from‐to) : 2021/04 -2023/03 

  Author : 徳田 一起

   

  銀河系における(特に太陽系近傍)分子雲から原始星がどのように形成されるかという問題については近年の観測技術の発達によりその原始星形 成極初期を除いては概ね理解されるようになった。星間ガスの大局的な流れ、あるいはガス雲同士の衝突により局所的に0.1 pc程度の幅を持つ高密度な紐状分子雲(以下、フィラメント状分子雲)が形成され、その後重力の力により分裂/収縮し、原始星形成に至るという描像である。一 方で遠方銀河の観測に目を向けると、現在の銀河系では見られないような高い効率で星が形成されており、少なくとも赤方偏移2程度までは増加傾向である。遠方銀河の観測は現在/将来の観測技術を以ってしても個々の星形成領域は分解できない。そこで本研究では、太陽系から最も近い低金属量銀河である小マゼラン雲を観測することにより、そこに存在する分子雲を観測し、内部での星形成活動を理解する。 ALMA望遠鏡のデータは通常、観測プロポーザルが採択された提案者に占有期間(1年)が与えられるため、それ以外のグループが後出しでアーカイブデータに着手することによる競争のリスクは大きい。そこで我々がまず比較的そのリスクを最小限に抑えられるデータに着目し、小マゼラン雲北側をカバーするデータの解析を進めた。その結果、小マゼラン雲においてはCO分子輝線が分子雲の高密度部分のみをトレースすることなどを見出し、これらのデータをプレゼンテーションする論文を出版した(Tokuda et al. 2021, ApJ, 922, 171)。
• 分子雲コア精密観測による乱流起源の超低質星/褐色矮星形成メカニズムの調査

  日本学術振興会：若手研究

  Date (from‐to) : 2018/04 -2020/03 

  Author : 徳田一起
• 高性能電波望遠鏡を用いた星形成初期条件の観測的研究

  日本学術振興会：科学研究費助成事業

  Date (from‐to) : 2015/04 -2017/03 

  Author : 徳田 一起

   

  星形成の研究において、いまだに形成される星の質量関数や連星の形成機構など、本質的な課題が解決されておらす、本研究ではALMA (Atacama Large Millimeter/sub-millimeter Array)を始めとする構成の電波望遠鏡を用いてそれらを観測的に明らかにすることを目的としている、本年度はALMA Cycle 1によるおうし座方向に存在する分子雲コア(MC27/L1521F)の論文化を行い、研究代表者の筆頭著者論文として受理された(Tokuda et al. 2016, ApJ, 826,26)。ALMAと単一望遠鏡のデータを組み合わせることにより、分子雲コアの内側でと外側の系統的な密度分布の違いを明らかにし、特に中心部は内部に存在する原始星や高密度ガス同士の動的な相互作用により生じた可能性があることを示した。また、これらの結果と合わせて、ALMAで観測された他の分子雲コアのアーカイブデータの比較より、ALMAを用いて観測するべき天体の選定基準と観測手法を考察し、博士論文に掲載した。 また本年度の終盤にはALMA Cycle 3で観測したこれまでよりも解像度が高いデータが手元に届き、解析に着手することができた。これまでに、MC27の中心に存在する原始星方向に初めて回転成分を伴ったdisk状のガスの成分を見出し、ケプラー回転を仮定するとその原始星の質量やdiskの物理量を見積もることができつつある。これらの物理量は原始星の初期の進化段階を理解する上で極めて重要となると考えており、2017年度初頭の論文化に向けての良い道筋を得ることができた。

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https://researchmap.jp/tokudakazuki