Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
National Astronomical Observatory of Japan
Nagoya University
Nagoya University
Nagoya University
Nagoya University
Universite Nice Sophia Antipolis
OptCraft Co.
出版者
宇宙航空研究開発機構(JAXA)
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料
雑誌名(英)
JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe
巻
JAXA-SP-17-010E
ページ
411 - 413
発行年
2018-03-09
会議概要（会議名, 開催地, 会期, 主催者等）（英）
SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan
抄録（英）
We are currently involved in the development of stellar coronagraphs, with which the contrast between a star and a planet orbiting it can be improved, with the primary aim of the direct observation of exoplanets. We have carried out demonstrations of our mask design ideas for the pupil of SPICA and developed new free-standing masks (Mask-B and Mask-C) using thin sheets of nickel. Mask-B is intended to be used with a small inner working angle (IWA), and therefore, would be useful for direct observations of young Jovian planets very close to stars. With Mask-C a wide-field coronagraphic image is realized, so would be useful for efficient surveys of unknown exoplanets far from their stars and observations of diffuse targets such as circumstellar disks related to planetary formation. These mask have the general advantages of a binary pupil mask, i.e., (1) they are robust against pointing errors, and (2) they can, in principle, make observations over a wide range of wavelengths. Furthermore, the design of these masks gives them the following very important asset in that (3) they are applicable to the pupil of the SPICA telescope, which is partially obscured by a secondary mirror and support spiders. We obtained the first results of our laboratory experiments using Mask-B and Mask-C. The contrast of Mask-B close to the center was in the order of 10(exp -4) and that of Mask-C over an extended field of view (6-23 λ /D) was in the order of 10(exp -5)-10(exp -6).
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
Laboratory Experiments using Binary Pupil Masks for the SPICA Coronagraphic Instrument
AA1730027091.pdf
(4.16MB)
