S20B0097abst
S20B0097
We request 40 nights to carry out WISHES, an HSC z-band imaging of 4,500 deg2 at high Galactic latitudes in the northern hemisphere down to z≃ 23.4 mag (10σ within 2″ diameter). The primary goal of WISHES is to promote cosmology and high-redshift Universe studies for the Euclid space mission. The proposed deep z-band imaging is crucial for improving photometric redshifts to the acceptable level for cosmic shear cosmology, and also for turning the unique Euclid’s near-infrared imaging capability into an efficient probe of the high-redshift Universe. WISHES propels Subaru’s scientific community into the era of all-sky science by running a synergistic survey enabling countless studies once coupled to various space missions (eROSITA, WISE, Gaia, LiteBIRD, in addition to Euclid) and is a stepping stone to WFIRST. WISHES would however produce science even without these space missions, in combination with the ur-band CFHT images, i-band Pan-STARRS images, and g-band HSC images, all being currently acquired over the same footprint (UNIONS). WISHES immediately allows us to explore a broad range of innovative science topics, including reference images to locate optical counterparts of gravitational waves, finding rare objects, and mapping the Milky Way structure.
This document was translated from LATEX by HEVEA.