Magnetic reconnection at Jupiter as observed from Hawaiian high-altitude facilities at solar maximum

• Project/Area Number: 24403009
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Space and upper atmospheric physics
• Research Institution: Japan Aerospace Exploration Agency
• Principal Investigator: SATOH Takehiko 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (10297632)
• Co-Investigator(Kenkyū-buntansha): FUJIMOTO Masaki 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (30242811) ; KAGITANI Masato 東北大学, 理学研究科, 助教 (30436076)
• Co-Investigator(Renkei-kenkyūsha): MISAWA Hiroaki 東北大学, 理学研究科, 教授 (90219618) ; TOKUMARU Munetoshi 名古屋大学, 太陽地球環境研究所, 教授 (60273207)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000); Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2013: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
• Keywords: 磁気圏 / リコネクション / 太陽風 / IMF / 木星 / 赤外線 / ハワイ / 高高度施設 / 木星磁気圏 / オーロラ / 赤外線観測

Outline of Final Research Achievements

In conjunction with the solar maximum, attempts were made to monitor Jupiter's infrared auroral activities from high-altitude observing facilities in Hawaii. Jupiter's rotational axis was most tilted from the normal to ecliptic plane at this time period. In such conditions, the IMF (mostly in the ecliptic plane) can be felt by the planet as northwar or southward magnetic fields, resulting in possible enhancement of magnetic reconnections. In the first half of the period, we tried to use a telescope atop Mauna Kea (Hawaii Island), and later half a telescope atop Haleakara (Maui Island). Due to troubles with the telescopes, Jupiter's aurora was not observed. Instead, we successfully obtained Jupiter and its satellite Io data (for monitoring volcanism on Io) in shorter infrared wavelengths. The emissions from Venus' nightside disk were also observed. These will reinforce future collaborations between space missions and high-altitude observing facilities.

Research Products

• [Journal Article] Venus' Clouds as inferred from the Phase Curves Acquired by IR1 and IR2 on board Akatsuki (2015)
  • Author(s): Satoh, T., Ohtsuki, S., Iwagami, N., Ueno, M., Uemizu, K., Suzuki, M., Hashimoto, G. L., Sakanoi, T., Kasaba, Y., Nakamura, R., Imamura, T., Nakamura, M., Fukuhara, T., Yamazaki, A., Yamada, M.
  • Journal Title: Icarus Volume: 248 Pages: 213-220
  • DOI: 10.1016/j.icarus.2014.10.030
  • Peer Reviewed
• [Journal Article] Cloud top structure of Venus revealed by Subaru/COMICS mid-infrared images (2014)
  • Author(s): Takao M. Sato, Hideo Sagawa, Toru Kouyama, Kazuaki Mitsuyama, Takehiko Satoh, Shoko Ohtsuki, Munetaka Ueno, Yasumasa Kasaba, Masato Nakamura, and Takeshi Imamura
  • Journal Title: Icarus Volume: 243 Pages: 386-399
  • DOI: 10.1016/j.icarus.2014.09.004
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mid-infrared observations of Io’s volcanism from the ground in 2011 and 2012 (2014)
  • Author(s): Yoneda, M.; Miyata, T.; Tsang, C. C. C.; Sako, S.; Kamizuka, T.; Nakamura, T.; Asano, T.; Uchiyama, M.; Okada, K.; Hayashi, Y.; Yoshii, Y.; Kagitani, M.; Sakanoi, T.; Kasaba, Y.; Okano, S.
  • Journal Title: Icarus Volume: 236 Pages: 153-156
  • DOI: 10.1016/j.icarus.2014.01.019
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Extreme Ultraviolet Radiation Measurement for Planetary Atmospheres/Magnetospheres from the Earth-Orbiting Spacecraft (Extreme Ultraviolet Spectroscope for Exospheric Dynamics: EXCEED) (2014)
  • Author(s): Yoshikawa, Ichiro; Yoshioka, Kazuo; Murakami, Go; Yamazaki, Atsushi; Tsuchiya, Fuminori; Kagitani, Masato; Sakanoi, Takeshi; Terada, Naoki; Kimura, Tomoki; Kuwabara, Masaki; Fujiwara, Kuto; Hamaguchi, Tomoya; Tadokoro, Hiroyasu
  • Journal Title: Space Science Reviews Volume: 184 Issue: 1-4 Pages: 237-258
  • DOI: 10.1007/s11214-014-0077-z
  • Peer Reviewed / Open Access
• [Journal Article] Retrieval of jovian cloud structure from the Cassini ISS limb-darkening data. I. Continuum scattering phase functions for cloud and haze in the South Tropical Zone (2013)
  • Author(s): Sato, T.M., T. Satoh, and Y. Kasaba
  • Journal Title: Icarus Volume: 222 Issue: 1 Pages: 100-121
  • DOI: 10.1016/j.icarus.2012.09.035
  • Peer Reviewed
• [Journal Article] On the feasibility of characterizing Jovian auroral electrons via H3+ infrared line-emission analysis (2012)
  • Author(s): Tao, Chihiro, et al.
  • Journal Title: Icarus Volume: 221 Issue: 1 Pages: 236-247
  • DOI: 10.1016/j.icarus.2012.07.015
  • Peer Reviewed
• [Presentation] NIIHAMA赤外線カメラによる木星観測 (2014)
  • Author(s): 佐藤 毅彦・米田 瑞生・鍵谷 将人・Jeff Kuhn
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: パシフィコ横浜（横浜市）
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] HOPS装置による金星上層ヘイズの観測 (2013)
  • Author(s): 榎本孝之,佐藤毅彦,仲谷善一,中串孝志,佐藤隆雄,大月祥子,細内麻悠
  • Organizer: 大気圏シンポジウム
  • Place of Presentation: 宇宙科学研究所(神奈川県相模原市)
  • Year and Date: 2013-02-28
• [Presentation] NIIHAMAプロジェクト：木星赤外オーロラの連続モニター (2013)
  • Author(s): 佐藤毅彦
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 千葉県幕張市
• [Presentation] NIIHAMA: A Program for Continuous Monitoring of Jupiter's Auroras (2013)
  • Author(s): Takehiko Satoh
  • Organizer: 10th Annual Meeting of Asia Oceania Geosciences Society
  • Place of Presentation: Brisbane, Australia
• [Presentation] HOPSによる偏光度分布観測から探る金星上層エアロゾルの性質 (2012)
  • Author(s): 佐藤毅彦・中串孝志・仲谷善一・木村かおる・榎本孝之
  • Organizer: 月惑星シンポジウム
  • Place of Presentation: 宇宙科学研究所(神奈川県相模原市)
  • Year and Date: 2012-08-02