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Proceedings Paper

WISH: wide-field imaging surveyor at high redshift
Author(s): Toru Yamada; Mamoru Doi; Tomotsugu Goto; Yuji Ikeda; Masatoshi Imanishi; Akio Inoue; Satoru Iwamura; Ikuru Iwata; Nobuyuki Kawai; Masakazu A. R. Kobayashi; Tadayuki Kodama; Yutaka Komiyama; Hideo Matsuhara; Yoshiki Matsuoka; Tomoki Morokuma; Kouji Ohta; Shinki Oyabu; Yoichi Sato; Hiroyuki Sugita; Ryo Tsutsui; Chihiro Tokoku; Saku Tsuneta; Takehiko Wada; Kiyoto Yabe; Naoki Yasuda; Daisuke Yonetoku
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Paper Abstract

WISH is a new space science mission concept whose primary goal is to study the first galaxies in the early universe. We will launch a 1.5m telescope equipped with 1000 arcmin2 wide-field NIR camera by late 2010's in order to conduct unique ultra-deep and wide-area sky surveys at 1-5 micron. The primary science goal of WISH mission is pushing the high-redshift frontier beyond the epoch of reionization by utilizing its unique imaging capability and the dedicated survey strategy. We expect to detect ~104 galaxies at z=8-9, ~3-6x103 galaxies at z=11-12, and ~50-100 galaxies at z=14-17 within about 5 years of the planned mission life time. It is worth mentioning that a large fraction of these objects may be bright enough for the spectroscopic observations with the extremely large telescopes. By adopting the optimized strategy for the recurrent observations to reach the depth, we also use the surveys to detect transient objects. Type Ia Supernova cosmology is thus another important primary goal of WISH. A unique optical layout has been developed to achieve the diffraction-limited imaging at 1-5micron over the required large area. Cooling the mirror and telescope to ~100K is needed to achieve the zodiacal light limited imaging and WISH will achieve the required temperature by passive cooling in the stable thermal environment at the orbit near Sun-Earth L2. We are conducting the conceptual studies and development for the important components of WISH including the exchange mechanism for the wide-field filters as well as the primary mirror fixation.

Paper Details

Date Published: 5 August 2010
PDF: 14 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77311Q (5 August 2010); doi: 10.1117/12.856561
Show Author Affiliations
Toru Yamada, Astronomical Institute, Tohoku Univ. (Japan)
Mamoru Doi, Institute of Astronomy, The Univ. of Tokyo (Japan)
Tomotsugu Goto, Institute for Astronomy, Univ. of Hawai'i (United States)
Yuji Ikeda, Photocoding (Japan)
Masatoshi Imanishi, National Astronomical Observatory of Japan (Japan)
Akio Inoue, Osaka Sangyo Univ. (Japan)
Satoru Iwamura, Montgomery, Rennie & Jonson, LPA (Japan)
Ikuru Iwata, Okayama Astrophysical Observatory, National Astronomical Observatory of Japan (Japan)
Nobuyuki Kawai, Tokyo Institute of Technology (Japan)
Masakazu A. R. Kobayashi, National Astronomical Observatory of Japan (Japan)
Tadayuki Kodama, National Astronomical Observatory of Japan (Japan)
Yutaka Komiyama, National Astronomical Observatory of Japan (Japan)
Hideo Matsuhara, Japan Aerospace Exploration Agency (Japan)
Yoshiki Matsuoka, Nagoya Univ. (Japan)
Tomoki Morokuma, National Astronomical Observatory of Japan (Japan)
Japan Society for the Promotion of Science (Japan)
Kouji Ohta, Kyoto Univ. (Japan)
Shinki Oyabu, Subaru Telescope, Japan Aerospace Exploration Agency (United States)
Yoichi Sato, Japan Aerospace Exploration Agency (Japan)
Hiroyuki Sugita, Japan Aerospace Exploration Agency (Japan)
Ryo Tsutsui, Kyoto Univ. (Japan)
Chihiro Tokoku, Astronomical Institute, Tohoku Univ. (Japan)
Saku Tsuneta, National Astronomical Observatory of Japan (Japan)
Takehiko Wada, Japan Aerospace Exploration Agency (Japan)
Kiyoto Yabe, Kyoto Univ. (Japan)
Naoki Yasuda, Institute for the Physics and Mathematics of the Universe, The Univ. of Tokyo (Japan)
Daisuke Yonetoku, Kanazawa Univ. (Japan)

Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann Jr.; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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