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  2. Shin TORIUMI

Shin TORIUMI

  (鳥海 森)

Profile Information

Affiliation
Associate Professor, Institute of Space and Astronautical Science, Department of Solar System Science, Japan Aerospace Exploration Agency
Degree
Ph.D. (Science)(Mar, 2014, The University of Tokyo)
Contact information
toriumi.shinjaxa.jp
Researcher number
30738290
ORCID ID
 https://orcid.org/0000-0002-1276-2403
J-GLOBAL ID
201801010150385982
researchmap Member ID
B000334089

Graduated from the School of Science, the University of Tokyo (PhD in Science, March 2014), Shin Toriumi has been working on the formation of sunspots and genesis of solar flares through both numerical simulations and observational data analysis. He is also interested in stellar activity phenomena. ADS Google Scholar ORCID

  • Magnetic flux emergence and sunspot formation: Sunspots are created through emergence of magnetic fields from the solar interior, which cannot be investigated by direct optical observations. Toriumi performed large-scale numerical simulations and revealed the physical properties of emerging magnetic fields such as a rising speed and magentic structure. He also developed a new method of probing subsurface magnetic fields using helioseismology and estimated the emergence speed, which was in accordance with the numerical result.
  • Sunspot jets and explosions: Sunspots harbor a variety of activity events like jets and explosions. He analyzed the observational data from Hinode and IRIS and numerical model of sunspots, revealing that the sunspots jets are caused by magnetic reconnection, driven by turbulent convection. → NAOJ press release
  • Flare-producing sunspots: Major solar flares tend to occur in complex-shaped sunspot groups. Toriumi analyzed a number of flare-producing sunspots and revealed their statistical properties. He also succeeded in the first-ever modling of spontaneous generation of flaring sunspots via realistic simulation of magnetic flux emergence. → HMI Nuggets Web release
  • Solar-Stellar connections: To see what starspots would look like, Toriumi surveyed sun-as-a-star light curves of sunspot transit events for a variety of wavelengths and explored the ways to characterize the magnetic and thermal circumstances of starspots.→ NASA press release He also revealed that ultra-hot atmospheres of the Sun and Sun-like stars are produced by the common heating mechanisms.→ American Univ press release
  • SOLAR-C: With the target launch in FY2028, Japan's next-generation solar-observing satellite SOLAR-C is now in Phase B. Toriumi is leading the development of science operation, data handling, ground segments, etc.
  • PR: He is involved in PR activities for the ISAS/JAXA, including the host for the live-streaming of the lunar landing of the Smart Lander for Investigating Moon (SLIM).→ YouTube Live

Research Interests

 8

Research Areas

 2

Research History

 4

Education

 3

Committee Memberships

 7
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Awards

 6
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Major Papers

 58
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Misc.

 33
  • Xudong Sun, Aimee Norton, Shin Toriumi, Peter Schuck, Jie Zhang
    HMI Science Nuggets, 200, Jun 9, 2024  
  • Shin Toriumi
    Monthly News on Astronomy from Nishi-Harima Astronomical Observatory, 401 3-5, Aug 15, 2023  Lead authorCorresponding author
  • Louise Harra, Lyndsay Fletcher, Laurent Gizon, Sami Solanki, Marco Romoli, Louise Harra, Kanya Kusano, Hideyuki Hotta, Yukio Katsukawa, Richard Harrison, Chris Owen, Jackie Davies, Shinsuke Imada, Shin Toriumi, Kostas Tziotziou, David Orozco-Suarez, Daniele Verscharen, Athanasios Papaioannou, Ryan Milligan, Georgia Tsiropoula, Hiroshisa Hara, Toshifumi Shimizu, Säm Krucker, Duncan Mackay, David Berghmans, Marie Dominique, Laurent Dolla, Sergei Shestov, Ioannis Daglis, George Balasis, Alexander Nindos, Kostis Moraitis, Costis Gontikakis, Sarah Matthews, Ineke De Moortel, Xenophon Moussas, Jose Carlos del Toro Iniesta, Mihalis Mathioudakis, Javier Rodriguez-Pacheco, Daniele Spadaro, Peter Gallagher, Duncan Mackay, Vincenzo Andretta, Andrew Fazakerley, Frederic Auchère, Silvano Fineschi, Daniele Telloni, Robert Wimmer-Schweingruber, Lucia Kleint, Hardi Peter, Natalie Krivova, Lakshmi Pradeeep Chitta, Krzysztof Barczynski, Wolfgang Finsterle, Alexis Rouillard, James McLaughlin, Nour E. Raouafi, Daniel Verscharen, Silvia Dalla, Anastasios Anastasiadis
    Bulletin of the American Astronomical Society, 55(3) 160, Jul 31, 2023  
    https://ui.adsabs.harvard.edu/abs/2023BAAS...55c.160H/abstract
  • 495 1-3, Jun, 2022  
  • 鳥海 森
    国立天文台ニュース, 331 3-5, Feb 1, 2021  
  • 清水敏文, 今田晋亮, 原弘久, 末松芳法, 都築俊宏, 勝川行雄, 久保雅仁, 石川遼子, 渡邊鉄哉, 川手朋子, 川手朋子, 鳥海森, 鄭祥子, 松崎恵一, 横山央明, 一本潔, 永田伸一, 浅井歩, 草野完也, 渡邉恭子, 飯田佑輔
    日本天文学会年会講演予稿集, 2021, 2021  
  • 鳥海 森
    ISASニュース, 478 2-4, Jan, 2021  
  • Toshifumi Shimizu, Shinsuke Imada, Tomoko Kawate, Yoshinori Suematsu, Hirohisa Hara, Toshihiro Tsuzuki, Yukio Katsukawa, Masahito Kubo, Ryoko Ishikawa, Tetsuya Watanabe, Shin Toriumi, Kiyoshi Ichimoto, Shin'ichi Nagata, Takahiro Hasegawa, Takaaki Yokoyama, Kyoko Watanabe, Katsuhiko Tsuno, Clarence M. Korendyke, Harry P. Warren, Bart De Pontieu, Paul Boerner, Sami K. Solanki, Luca Teriaca, Udo Schühle, Sarah Matthews, David Long, William Thomas, Barry Hancock, Hamish Reid, Andrzej Fludra, Frederic Auchere, Vincenzo Andretta, Giampiero Naletto, Luca Poletto, Louise Harra
    Proceedings of the SPIE, 11444, Dec 13, 2020  
  • 今田晋亮, 清水敏文, 川手朋子, 鳥海森, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 渡邉恭子, 一本潔, 永田伸一, 浅井歩, 阿南徹, 横山央明, 草野完也, LONG David, WARREN Harry P.
    日本天文学会年会講演予稿集, 2020, 2020  
  • 今田晋亮, 清水敏文, 川手朋子, 鳥海森, 末松芳法, 原弘久, 渡邊鉄哉, 勝川行雄, 久保雅仁, 渡邉恭子, 一本潔, 永田伸一, 浅井歩, 阿南徹, 横山央明, 草野完也, LONG David, WARREN Harry P.
    日本天文学会年会講演予稿集, 2020, 2020  
  • S. Toriumi
    HMI Science Nuggets, 134, Dec 17, 2019  Lead authorCorresponding author
  • S. Toriumi
    PSTEP Science Nuggets, 25, Dec 4, 2019  Lead authorCorresponding author
  • T. Shimizu, S. Imada, T. Kawate, K. Ichimoto, Y. Suematsu, H. Hara, Y. Katsukawa, M. Kubo, S. Toriumi, T. Watanabe, T. Yokoyama, C.M. Korendyke, H.P. Warren, T. Tarbell, B. De Pontieu, L. Teriaca, U.H. Schühle, S. Solanki, L.K. Harra, S. Matthews, A. Fludra, F. Auchère, V. Andretta, G. Naletto, A. Zhukov
    Proceedings of the SPIE, 1111807, Sep 9, 2019  
  • 鳥海森
    天文月報, Aug, 2019  InvitedLead authorCorresponding author
  • 鳥海森
    日本物理学会講演概要集, 73.1 759-760, May 13, 2019  Invited
    会議情報 主催: 一般社団法人日本物理学会 会議名: 2018年度日本物理学会第73回年次大会 開催日: 2018/03/22 - 2018/03/25
  • 清水敏文, 今田晋亮, 川手朋子, 鳥海森, 末松芳法, 原弘久, 勝川行雄, 久保雅仁, 鹿野良平, 石川遼子, 渡邊鉄哉, 横山央明, 一本潔, 浅井歩, 永田伸一, 渡邉恭子, 草野完也, KORENDYKE C., WARREN H., DE PONTIEU B., SOLANKI S., L.Teriaca, AUCHERE F., MATTHEWS S., HARRA L., FLUDRA A., VINCENZO A.
    日本天文学会年会講演予稿集, 2019, 2019  
  • 今田晋亮, 清水敏文, 川手朋子, 一本潔, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 鳥海森, 渡邉恭子, 永田伸一, 草野完也, 横山央明, LONG David, WARREN Harry P.
    プラズマ・核融合学会年会(Web), 36th, 2019  
  • 清水敏文, 今田晋亮, 川手朋子, NODA C. Quitero, 一本潔, 一本潔, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 鳥海森, LEE K-S., 横山央明, 渡邉恭子, 永田伸一, 阿南徹, 草野完也, KORENDYKE C., WARREN H., TARBELL T., SOLANKI S., TERIACA L., AUCHERE F., HARRA L., VINCENZO A., ZHUKOV A.
    日本天文学会年会講演予稿集, 2019, 2019  
  • N. Nishizuka, H. Hotta, S. Toriumi
    Journal of Plasma and Fusion Research, 94(2) 51-57, Feb, 2018  
  • 今田晋亮, 清水敏文, 川手朋子, QUITERO NODA Carlos, 一本潔, 一本潔, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 鳥海森, LEE Kyoung-Sun, 渡邉恭子, 永田伸一, 阿南徹, 草野完也, 横山央明, LONG David, WARREN Harry P.
    日本天文学会年会講演予稿集, 2018, 2018  
  • 清水敏文, 今田晋亮, 川手朋子, QUITERO NODA C., 一本潔, 一本潔, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 鳥海森, LEE K-S., 渡邉恭子, 永田伸一, 阿南徹, 草野完也, 横山央明, KORENDYKE C., WARREN H., TARBELL T., SOLANKI S., TERIACA L., AUCHERE F., HARRA L., VINCENZO A., ZHUKOV A.
    日本天文学会年会講演予稿集, 2018, 2018  
  • 川手朋子, 清水敏文, 今田晋亮, QUITERO NODA Carlos, 一本潔, 一本潔, 原弘久, 渡邊鉄哉, 末松芳法, 勝川行雄, 久保雅仁, 鳥海森, LEE Kyoung-Sun, 渡邉恭子, 永田伸一, 阿南徹, 草野完也, 横山央明, KORENDYKE Clarence, TARBELL Theodore D., TERIACA Luca, AUCHERE Frederic
    日本天文学会年会講演予稿集, 2018, 2018  
  • H. Wang, V. Yurchyshyn, C. Liu, K. Ahn, S. Toriumi, W. Cao
    Research Notes of the American Astronomical Society, 2(1) 8, Jan, 2018  
    https://ui.adsabs.harvard.edu/abs/2018RNAAS...2....8W/abstract
  • S. Toriumi
    PSTEP Science Nuggets, 4, Jan 11, 2017  Lead author
  • 鳥海森
    パリティ, 32(1) 63, Jan, 2017  Invited
  • S. Toriumi, C.J. Schrijver, L.K. Harra, H. Hudson, K. Nagashima
    HMI Science Nuggets, 65, Dec 17, 2016  Lead authorCorresponding author
  • S. Toriumi
    The Astronomical Herald, 107(11) 639-646, Nov, 2014  InvitedLead authorCorresponding author
  • S. Toriumi, T. Yokoyama
    JPS Conference Proceedings, 1 015107, 2014  Lead authorCorresponding author
  • Kusano Kanya, Bamba Yumi, Yamamoto Tetsuya, Iida Yusuke, Toriumi Shin, Asai Ayumi
    Meeting abstracts of the Physical Society of Japan, 68(1) 263-263, Mar 26, 2013  
  • Shin Toriumi, Takaaki Yokoyama
    HINODE-3: THE 3RD HINODE SCIENCE MEETING, 454 259-262, 2012  Lead authorCorresponding author
    We perform two-dimensional magnetohydrodynamic (MHD) simulations of the flux emergence from the solar convection zone to the corona. The flux sheet is initially located moderately deep (-20,000 km) in the adiabatically stratified convection zone and is perturbed to trigger the Parker instability. The flux rises through the interior, but decelerates around the strongly sub-adiabatic photosphere. As the magnetic pressure gradient increases, the flux becomes unstable to the Parker instability again so that further evolution to the corona occurs. We show the results of the simulations based on this 'two-step emergence' model and make sonic discussions in connection with the results of the thin-flux-tube simulations.
  • Shin Toriumi, Takaaki Yokoyama
    FIFTH HINODE SCIENCE MEETING: EXPLORING THE ACTIVE SUN, 456 33-38, 2012  Lead authorCorresponding author
    In this study, we aim to figure out the flux emergence from the interior to the atmosphere through the surface, by conducting a numerical simulation and a Hinode/SOT observation. First, we performed a three-dimensional magnetohydrodynamic (MHD) simulation on the flux tube emergence from -20,000 km of the convective layer. As a result, the rising tube expands sideways beneath the surface to create a flat structure. As time goes on, the subphotospheric field rises again into the corona due to the magnetic buoyancy instability. We newly found that the photospheric magnetogram shows multiple separation events as well as shearing motions, which reflects the Parker instability of the subphotospheric field. This situation agrees well with Strous & Zwaan (1999)'s model based on their observation. We also confirmed that the wave-length perpendicular to the separations is approximately a few times the tube's initial radius. Secondly, we analyzed SOT/FG magnetogram of AR 10926, and observed that the small-scale magnetic elements among the major sunspots make alignments with a certain orientation. The wavelength perpendicular to the alignments was found to be similar to 3,000 km. Comparing with the numerical results, we speculate that this active region observed by the SOT is created by the rising flux tube with a radius of the order of 1,000 km in the deeper convection zone.
  • Toriumi Shin, Yokoyama Takaaki
    2010 212-212, 2010  
    Solar active regions including sunspots are thought to be the consequence of the emergence of a magnetic flux tube from the bottom of the convection zone (at -200,000km depth). Here we perform the two-dimensional magnetohydrodynamic (MHD) simulations to show the emergence of the flux tube from a -20,000km depth to the atmosphere through the solar surface. The simulations are done for the axial and the cross-sectional evolutions of the flux tube. As a result, both fluxes show the deceleration halfway to the surface and extend laterally near the surface. From the parameter surveys, we obtain the conditions for actual active regions: the field strength 10^4G, the total magnetic flux 10^<21>-10^<22>Mx, and the twist 5.0×10^<-4>km^<-1> at -20,000km depth.
  • Toriumi Shin, Yokoyama Takaaki
    2009 104-104, 2009  
    Emerging magnetic flux tubes in the solar convection zone are thought to be responsible for formation of active regions. We performed two-dimensional MHD simulations of the flux emergence from the solar interior to the atmosphere. The flux tube is initially placed deep down at the convection zone (-20,000km) and perturbed to generate Parker instability. The tube rises through the convection zone, but stops below the surface bacause of the strong pressure gradient. After being unstable to the Parker instability, the tube emerges to the atmosphere again. We show this 'two-step emergence' model and have some discussions on the parameter survey.

Books and Other Publications

 3

Major Presentations

 309
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Teaching Experience

 4

Professional Memberships

 5

Major Research Projects

 10
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Academic Activities

 15
  • Planning, Management, etc., Panel moderator, Session chair, etc.
    Japan Geoscience Union (Makuhari Messe / Virtual), May 30, 2024 - May 30, 2024
  • Planning, Management, etc.
    (Niigata, Japan), Sep 25, 2023 - Sep 29, 2023
    Served as the chair of the Scientific Organizing Committee (SOC) for the 6th NAOJ Symposium Hinode-16/IRIS-13
  • Planning, Management, etc.
    Japan Geoscience Union (Makuhari Messe / Virtual), May 21, 2023 - May 26, 2023
  • Planning, Management, etc.
    Committee on Space Research (COSPAR) (Athens / Online), Aug 21, 2022 - Aug 23, 2022
    Session title: Connecting Solar and Stellar Coronal Mass Ejections: Lessons Learned, Challenges and Perspectives
  • Planning, Management, etc., Panel moderator, Session chair, etc.
    Japan Geoscience Union (Makuhari Messe / Virtual), May 24, 2022 - Jun 1, 2022
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Social Activities

 27

Media Coverage

 14
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