Ion temperature anisotorpy measured from Specro-polarimetory of atomic oxygen emission close to Io

• Project/Area Number: 26800254
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Space and upper atmospheric physics
• Research Institution: Tohoku University
• Principal Investigator: Kagitani Masato 東北大学, 理学(系)研究科(研究院), 助教 (30436076)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: イオ / 偏光分光 / 酸素原子 / 6300 / 偏光 / 高分散分光 / 光ファイバアレイ

Outline of Final Research Achievements

I have developed a spectro-polarimeter fed to 60-cm telescope at Haleakala observatory in order to observe atomic oxygen emission close to jovian satellite, Io. An observation made on February 2016 revealed that the degree of linear polarization (DoLP) is 21 +/- 32% for OI 630.0 nm emission line close to Io. Further observation on May 2016 will enable us to achieve an accuracy of DoLP better than 7%.

Research Products

• [Presentation] 地上望遠鏡とHisaki/EXCEEDとによるイオプラズマトーラスのイオン組成の計測 (2016)
  • Author(s): 鍵谷 将人
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ（千葉市）
  • Year and Date: 2016-05-26
• [Presentation] Observation of ion temperature and corotation deviation on Io plasma torus during an outburst in early 2015 (2015)
  • Author(s): 鍵谷 将人, 米田 瑞生, EXCEEDミッションチーム吉川 一朗
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2015-11-01
• [Presentation] Coordinated observation of Io plasma torus using Hisaki/EXCEED and gourd-based telescopes (2015)
  • Author(s): 鍵谷 将人, Andrew Steffl, Sarah Badman
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ（千葉市）
  • Year and Date: 2015-05-28
• [Presentation] Coordinated observation of Io plasma torus with gourd-based telescopes and Hisaki/EXCEED (2014)
  • Author(s): Masato Kagitani, Andrew Steffl, Sarah Badman
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 長野県松本市
  • Year and Date: 2014-11-02
• [Presentation] Coordinated observation of Io plasma torus using Hisaki/EXCEED and ground-based telescopes (2014)
  • Author(s): Masato Kagitani, Andrew Steffl, Sarah Badman
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 神奈川県横浜市
  • Year and Date: 2014-05-01