5 August 2010 WISH: wide-field imaging surveyor at high redshift
Author Affiliations +
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.
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Toru Yamada, Toru Yamada, Mamoru Doi, Mamoru Doi, Tomotsugu Goto, Tomotsugu Goto, Yuji Ikeda, Yuji Ikeda, Masatoshi Imanishi, Masatoshi Imanishi, Akio Inoue, Akio Inoue, Satoru Iwamura, Satoru Iwamura, Ikuru Iwata, Ikuru Iwata, Nobuyuki Kawai, Nobuyuki Kawai, Masakazu A. R. Kobayashi, Masakazu A. R. Kobayashi, Tadayuki Kodama, Tadayuki Kodama, Yutaka Komiyama, Yutaka Komiyama, Hideo Matsuhara, Hideo Matsuhara, Yoshiki Matsuoka, Yoshiki Matsuoka, Tomoki Morokuma, Tomoki Morokuma, Kouji Ohta, Kouji Ohta, Shinki Oyabu, Shinki Oyabu, Yoichi Sato, Yoichi Sato, Hiroyuki Sugita, Hiroyuki Sugita, Ryo Tsutsui, Ryo Tsutsui, Chihiro Tokoku, Chihiro Tokoku, Saku Tsuneta, Saku Tsuneta, Takehiko Wada, Takehiko Wada, Kiyoto Yabe, Kiyoto Yabe, Naoki Yasuda, Naoki Yasuda, Daisuke Yonetoku, Daisuke Yonetoku, } "WISH: wide-field imaging surveyor at high redshift", Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 77311Q (5 August 2010); doi: 10.1117/12.856561; https://doi.org/10.1117/12.856561


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