Solar chromosphere: plasma dynamics and magnetic field configuration revealed by spaceborne instruments

• Project/Area Number: 25800120
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Astronomy
• Research Institution: Nagoya University (2015); Japan Aerospace Exploration Agency (2013-2014)
• Principal Investigator: Okamoto Joten 名古屋大学, 宇宙地球環境研究所, 研究員 (70509679)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 太陽観測衛星ひので / 太陽観測衛星IRIS / プロミネンス / コロナ加熱 / 波動 / 振動 / 共鳴吸収 / 彩層 / 回転 / 磁場 / 国際情報交換 / 太陽 / IRIS / ひので / アメリカ

Outline of Final Research Achievements

We have joined efforts to directly detect for the first time a long hypothesised heating mechanism in action in the solar corona, the outer layer of the solar atmosphere. By combining high resolution observations from JAXA's Hinode mission and NASA's IRIS mission, together with state-of-the-art numerical simulations and modelling to guide interpretation, we have managed to detect and identify the observational signatures of resonant absorption, a wave-related mechanism of energy conversion, thought to play an important role in the so-called "coronal heating problem", one of the most important unsolved astrophysical problems for mankind.

Research Products

• [Int'l Joint Research] Lockheed Martin/National Solar Observatory/Stanford University,(米国)
• [Int'l Joint Research] University of Oslo(ノルウェー)
• [Int'l Joint Research] KU Leuven(ベルギー)
• [Journal Article] Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. I. Observational Aspects (2015)
  • Author(s): Okamoto, Takenori J.; Antolin, Patrick; De Pontieu, Bart; Uitenbroek, Han; Van Doorsselaere, Tom; Yokoyama, Takaaki
  • Journal Title: The Astrophysical Journal Volume: 809 Issue: 1 Pages: 71-71
  • DOI: 10.1088/0004-637x/809/1/71
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Resonant Absorption of Transverse Oscillations and Associated Heating in a Solar Prominence. II. Numerical Aspects (2015)
  • Author(s): Antolin, P.; Okamoto, T. J.; De Pontieu, B.; Uitenbroek, H.; Van Doorsselaere, T.; Yokoyama, T.
  • Journal Title: The Astrophysical Journal Volume: 809 Issue: 1 Pages: 72-72
  • DOI: 10.1088/0004-637x/809/1/72
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] First High-resolution Spectroscopic Observations of an Erupting Prominence Within a Coronal Mass Ejection by the Interface Region Imaging Spectrograph (IRIS) (2015)
  • Author(s): Wei Liu, Bart De Pontieu, Jean-Claude Vial, Alan M. Title, Mats Carlsson, Han Uitenbroek, Takenori J. Okamoto, Thomas E. Berger, Patrick Antolin
  • Journal Title: The Astrophysical Journal Volume: 803 Issue: 2 Pages: 85-85
  • DOI: 10.1088/0004-637x/803/2/85
  • Peer Reviewed
• [Journal Article] The Interface Region Imaging Spectrograph (IRIS) (2014)
  • Author(s): De Pontieu,B., Title,A.M., Lemen,J.R., Kushner,G.D., Akin,D.J., Allard,B., Berger,T., Boerner,P., Cheung,M., Chou,C., Drake,J.F., Duncan,D.W., Freeland,S., Heyman,G.F., Hoffman,C., Hurlburt,N.E., Lindgren,R.W., Mathur,D., Rehse,R., Okamoto.et al.
  • Journal Title: Solar Physics Volume: 289 Issue: 7 Pages: 2733-2779
  • DOI: 10.1007/s11207-014-0485-y
  • Peer Reviewed
• [Journal Article] Study on Triggering Process of Solar Flares Based on Hinode/SOT Observations (2013)
  • Author(s): Bamba, Y., Kusano, K., Yamamoto, T. T., Okamoto, T. J.
  • Journal Title: The Astrophysical Journal Volume: 778 Issue: 1 Pages: 48-48
  • DOI: 10.1088/0004-637x/778/1/48
  • Peer Reviewed
• [Presentation] IRIS-Hinode observations of prominences (2016)
  • Author(s): Joten Okamoto
  • Organizer: ALMA-IRIS-DKIST Workshop
  • Place of Presentation: アメリカ・コロラド州ボルダー
  • Year and Date: 2016-03-15
  • Int'l Joint Research
• [Presentation] Resonant Absorption in the Solar Atmosphere (2016)
  • Author(s): Joten Okamoto
  • Organizer: Dynamic Sun-I. MHD Waves and Confined Transients in the Magnetized Atmosphere
  • Place of Presentation: インド・ワラナシ
  • Year and Date: 2016-02-22
  • Int'l Joint Research / Invited
• [Presentation] ALMAを使った研究計画 (2016)
  • Author(s): 岡本丈典
  • Organizer: 太陽研連シンポジウム「ひので10年目の 成果とSolar-Cを柱とする太陽研究の新展開」
  • Place of Presentation: 国立天文台（東京都三鷹市）
  • Year and Date: 2016-02-15
  • Invited
• [Presentation] Hinode-IRIS observations of a solar prominence: Coronal heating by Alfven waves (2015)
  • Author(s): J. Okamoto and collaborators
  • Organizer: Founding Symposium for the Institute for Space-Earth Environmental Research Evolution of the Space-Sun-Earth Environmental System in Space and Time
  • Place of Presentation: 名古屋大学（名古屋市）
  • Year and Date: 2015-11-04
  • Int'l Joint Research
• [Presentation] Atmospheric dynamics/heating from coordinated IRIS/Hinode/SDO observations (2015)
  • Author(s): Joten Okamoto
  • Organizer: IRIS-4 Workshop
  • Place of Presentation: アメリカ・コロラド州ボルダー
  • Year and Date: 2015-05-18
  • Int'l Joint Research / Invited
• [Presentation] ひので–IRIS の共同観測：プロミネンスの回転運動 (2015)
  • Author(s): 岡本丈典、IRIS team
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 大阪大学（豊中市）
  • Year and Date: 2015-03-18 – 2015-03-21
• [Presentation] IRIS観測1年 (2015)
  • Author(s): 岡本丈典
  • Organizer: 太陽研究者連絡会シンポジウム「サイクル24 極大期の太陽活動と太陽研究の将来展望」
  • Place of Presentation: 名古屋大学（名古屋市）
  • Year and Date: 2015-02-16 – 2015-02-18
  • Invited
• [Presentation] Observational evidence of resonant absorption in oscillating prominence (2014)
  • Author(s): Joten Okamoto, Patrick Antolin, Bart De Pontieu, Han Uitenbroek, Tom Van Doorsselaere, Takaaki Yokoyama
  • Organizer: AGU Fall Meeting 2014
  • Place of Presentation: アメリカ・カリフォルニア州サンフランシスコ
  • Year and Date: 2014-12-15 – 2014-12-19
  • Invited
• [Presentation] Waves and Oscillations in Prominences (2014)
  • Author(s): Joten Okamoto
  • Organizer: Coupling and Dynamics of the Solar Atmosphere
  • Place of Presentation: インド・プネ
  • Year and Date: 2014-11-10 – 2014-11-14
  • Invited
• [Presentation] IRIS-Hinode Collaborative Observations of Oscillating Prominences and Discovery of Resonant Absorption (2014)
  • Author(s): Joten Okamoto
  • Organizer: 2014 LWS/Hinode/IRIS Workshop
  • Place of Presentation: アメリカ・オレゴン州ポートランド
  • Year and Date: 2014-11-03 – 2014-11-06
  • Invited
• [Presentation] ひので–IRIS の共同観測：波動散逸の現場に迫る (2014)
  • Author(s): 岡本丈典、Patrick Antolin, Bart De Pontieu, IRIS team
  • Organizer: 日本天文学会秋季年会
  • Place of Presentation: 山形大学（山形市）
  • Year and Date: 2014-09-11 – 2014-09-13
• [Presentation] 彩層の物理 (2014)
  • Author(s): 岡本丈典
  • Organizer: GEMSIS ワークショップ
  • Place of Presentation: 名古屋大学（名古屋市）
  • Year and Date: 2014-09-09 – 2014-09-10
  • Invited
• [Presentation] ひのでーIRIS の共同観測：プロミネンス (2014)
  • Author(s): 岡本丈典, Bart De Pontieu, Ted Tarbell, Alan Title, IRIS team
  • Organizer: 日本天文学会春季年会
  • Place of Presentation: 国際基督教大学（東京都三鷹市）
• [Presentation] IRISの最新状況 (2014)
  • Author(s): 岡本丈典
  • Organizer: 太陽研連シンポジウム
  • Place of Presentation: 京都大学（京都府京都市）
  • Invited
• [Presentation] 太陽大気における波動の観測 (2014)
  • Author(s): 岡本丈典
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
  • Invited
• [Presentation] 3D structure and dynamics of prominences in IRIS-Hinode collaborative observations (2013)
  • Author(s): Joten Okamoto, Bart De Pontieu, Ted Tarbell, Alan Title, IRIS team
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, California, USA
• [Presentation] Hinode-IRIS observations of prominences (2013)
  • Author(s): Joten Okamoto, Bart De Pontieu, Ted Tarbell, Alan Title, IRIS team
  • Organizer: 7th Hinode Science Meeting
  • Place of Presentation: Takayama, Gifu, Japan
• [Remarks] 日米太陽観測衛星「ひので」「IRIS」の共演： 太陽コロナ加熱メカニズムの観測的証拠を初めて捉えた
  • URL: http://hinode.nao.ac.jp/news/1508Hinode-IRIS/
• [Remarks] IRIS and Hinode: A Stellar Research Team
  • URL: https://www.nasa.gov/feature/goddard/iris-and-hinode-stellar-research-team