Yamada, Toru; Iwata, Ikuru; Ando, Makiko; Doi,
Mamoru; Goto, Tomotsugu;
Ikeda, Yuji; Imanishi,
Masatoshi; Inoue, Akio K.; Iwamura, Satoru; et al.
2012, SPIE
■ アブストラクト
WISH, Wide-field Imaging Surveyor for High-redshiftt, is a space
mission concept to conduct very deep and widefield surveys at near
infrared wavelength at 1-5μm to study the properties of galaxies at
very high redshift beyond the epoch of cosmic reionization. The
concept has been developed and studied since 2008 to be proposed for
future JAXA/ISAS mission. WISH has a 1.5m-diameter primary mirror and
a wide-field imager covering 850 arcmin2. The pixel scale is 0.155
arcsec for 18μm pitch, which properly samples the diffraction-limited
image at 1.5μm. The main program is Ultra Deep Survey (UDS) covering
100 deg2 down to 28AB mag at least in five broad bands. We expect to
detect <104 galaxies at z=8-9, 103-104 galaxies at z=11-12, and
50-100 galaxies at z<14, many of which can be feasible targets for
deep spectroscopy with Extremely Large Telescopes. With recurrent deep
observations, detection and light curve monitoring for type-Ia SNe in
rest-frame infrared wavelength is also conducted, which is another
main science goal of the mission. During the in-orbit 5 years
observations, we expect to detect and monitor <2000 type-Ia SNe up
to z~2. WISH also conducts Ultra Wide Survey, covering 1000deg2 down
to 24-25AB mag as well as Extreme Survey, covering a limited number of
fields of view down to 29-30AB mag. We here report the progress of the
WISH project including the basic telescope and satellite design as
well as the results of the test for a proto-model of the flip-type
filter exchanger which works robustly near 100K.