Performance evaluation of an ultra widel-field multi-object adaptive optics on the Subaru telescope

2016 Fiscal Year Final Research Report

• Project/Area Number: 26287027
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Tohoku University
• Principal Investigator: Akiyama Masayuki 東北大学, 理学(系)研究科(研究院), 教授 (50425401)
• Co-Investigator(Renkei-kenkyūsha): OYA Shin 国立天文台, TMT推進室, 特任准教授 (80399287)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 補償光学 / トモグラフィー補償光学 / 多天体補償光学 / 波面測定

Outline of Final Research Achievements

We demonstrate a new tomographic wavefront estimation algorithm, ”multi-timestep tomographic wavefront reconstruction", which achieve more accurate tomographic estimation in wide field of view, with a multi object adaptive optics system, RAVEN, on the Subaru telescope. We analyzed the wavefront measurements data of RAVEN, and found that (1) the turbulence pattern at each altitude layer can be regarded as moving with winds, and the pattern can be regarded as "frozen" in the time scale of 100ms. Those results indicate the multi-timestep tomographic wavefront reconstruction method is effective to enlarge the field of view of tomographic wavefront estimation.

Free Research Field

可視赤外線装置開発、銀河進化研究