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

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K03944
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: Tohoku 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
• Keywords: 補償光学 / 低散乱

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.

Free Research Field

惑星分光物理学

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。