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Study on plume activity on Icy moons using low-scattered-light telescope

Research Project

Project/Area Number 19K03944
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17010:Space and planetary sciences-related
Research InstitutionTohoku University

Principal Investigator

Kagitani Masato  東北大学, 理学研究科, 助教 (30436076)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Discontinued (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords補償光学 / 低散乱 / 軸外し望遠鏡 / エンケラドス / エウロパ / 噴出活動 / 低散乱望遠鏡 / PLANETS望遠鏡
Outline of Research at the Start

ハワイ・ハレアカラに設置が予定されている1.8mの低散乱望遠鏡(PLANETS望遠鏡)を用いて太陽系の氷天体の活動現象の解明を推進する。特に、地表氷面の裂け目から地下海を起源とする水やその乖離性生成物を吹き出す氷衛星に着目し、その噴出(プリューム)活動の変動を数ヶ月以上の期間に渡って捉えることを目的とする。従来の8m級の公募型・汎用望遠鏡では、連続した観測が不可能で、性能の最適化が不十分であった。PLANETS望遠鏡は中口径ながら低散乱で高コントラストな光学系を有し氷衛星からの噴出物を始めとする惑星と衛星近傍の微弱発光の観測に対して自前の連続的観測を可能とする。

Outline of Final Research Achievements

It will be the key to achieving low-scattering and high-contrast for the purpose of promoting the plume activity phenomena of icy bodies in the solar system using the 1.8 m low scattering telescope PLANETS scheduled to be installed in Haleakala, Hawaii.
We have developed a visible AO system for T60, which consists of a 140-element MEMS deformable mirror and a Shack-Hartmann wavefront sensor, and achieves closed-loop control up to 600Hz. Adaptive optics test observations were carried out on the Haleakala 60cm telescope, and it was confirmed that a high spatial resolution with a half-value width of 0.45" was achieved at 590nm.

Academic Significance and Societal Importance of the Research Achievements

ハワイ・ハレアカラに設置が予定されている1.8mの低散乱望遠鏡PLANETSを用いて太陽系の氷天体の活動現象の解明を推進することを目的に、低散乱かつ高コントラストを達成する上で要となる、補償光学を備えたコロナグラフの開発を行った。ハレアカラ60cm望遠鏡に取り付けて補償光学試験観測を行い、590nmにおいて半値幅0.45"となる高空間分解能を達成することが確認された。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] High dynamic-range observation using a 1.8-m off-axis telescope PLANETS: feasibility study and telescope design2020

    • Author(s)
      Kagitani Masato、Sakanoi Takeshi、Kasaba Yasumasa、Hirahara Yasuhiro、Kurita Mikio、Kuhn Jeffrey R.、Berdyugina Svetlana V.、Emilio Marcelo
    • Journal Title

      Proc. SPIE

      Volume: 11445 Pages: 1144543-1144543

    • DOI

      10.1117/12.2556458

    • Related Report
      2020 Research-status Report
    • Open Access / Int'l Joint Research
  • [Journal Article] A coronagraph using a digital micromirror device as an adaptive occultation mask: design and observational result2020

    • Author(s)
      Kagitani Masato、Sakanoi Takeshi、Kasaba Yasumasa、Okano Shoichi
    • Journal Title

      Proc. SPIE

      Volume: 11447 Pages: 114479-114479

    • DOI

      10.1117/12.2561906

    • Related Report
      2020 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] 1.8m軸外し望遠鏡PLANETSの開発状況2021

    • Author(s)
      Masato Kagitani
    • Organizer
      日本天文学会2021春期年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] High dynamic range observation using a 1.8 m off axis telescope PLANETS: feasibility study and telescope assembly2021

    • Author(s)
      Masato Kagitani
    • Organizer
      JpGU 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High dynamic-range observation using a 1.8-m off-axis telescope PLANETS: feasibility study and telescope design2020

    • Author(s)
      Kagitani Masato、Sakanoi Takeshi、Kasaba Yasumasa、Hirahara Yasuhiro、Kurita Mikio、Kuhn Jeffrey R.、Berdyugina Svetlana V.、Emilio Marcelo
    • Organizer
      SPIE Astronomical Telescopes + Instrumentation, 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] A coronagraph using a digital micromirror device as an adaptive occultation mask: design and observational result2020

    • Author(s)
      Kagitani Masato、Sakanoi Takeshi、Kasaba Yasumasa、Okano Shoichi
    • Organizer
      SPIE Astronomical Telescopes + Instrumentation, 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 1.8m 軸外し望遠鏡PLANETS の開発状況2020

    • Author(s)
      鍵谷将人, 坂野井健, 笠羽康正, 平原靖大, 栗田光樹夫
    • Organizer
      日本天文学会2020年秋季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 1.8m軸外し望遠鏡PLANETS による高ダイナミックレンジ観測2020

    • Author(s)
      鍵谷将人, 鈴木駿久, 坂野井健, 笠羽康正, 平原靖大, 栗田光樹夫
    • Organizer
      日本天文学会2020年春季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structure of Io plasma torus observed with the Tohoku 60-cm telescope2019

    • Author(s)
      Masato Kagitani, Fuminori Tsuchiya, Kazuo Yoshioka, Go Murakami, Tomoki Kimura, Ryoichi Koga, Reina Hikida, Takeshi Sakanoi
    • Organizer
      Japan Geoscience Union Meeting 2019
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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