*** Requested Observations for S20A ***
3.5 nights Subaru HSC, given HSC availability, and 4 nights Keck II DEIMOS
[a similar request will be made in S20B, the final semester of the H20 LCP]
A 20 deg2 deep Subaru Hyper-SuprimeCam imaging & Keck LRIS + MOSFIRE spectroscopic survey of the two primary Euclid Deep Calibration Fields (NEP and CDFS)
Subary Telescope is the 8.2-meter (320 in) flagship telescope of the National Astronomical Observatory of Japan located at the Maunakea Observatory on Hawaii .
The twin Keck Observatory telescopes are among the world’s most scientifically productive optical and infrared telescopes.
We propose the Hawaii Two-0 (H20) survey, which will help to put Hawaii at the forefront of galaxy evolution studies for the next decade or more. This will be achieved by carrying out a 20 deg2 deep Subaru Hyper-SuprimeCam (HSC) imaging and Keck DEIMOS + MOSFIRE spectroscopic survey of the two primary Euclid Deep Calibration Fields (NEP and CDFS). These two 10 deg2 fields are the targets of the largest allocation of Spitzer time ever granted (~5300h) and will be the targets of ultra-deep 1-2 μm photometry and spectroscopy by the Euclid mission scheduled to launch in early 2021. The H20 data will permit immediate science investigations at z < 7 using the HSC+Spitzer data and will give Hawaii priority for z > 7 science once Euclid launches.
Probe the assembly of massive galaxies by tracing the evolution of their stellar mass function with >500,000 galaxies at 3 < z < 6 and including several thousand at z > 6.
Stellar Mass Functions
Link the stellar mass of galaxies to their dark matter halos via clustering, for testing of cosmological models.
Constrain the properties of dark energy using the non-linear power spectrum at high-redshift.
Identify the earliest sites of galaxy formation and reionization, and spectroscopically confirm high-escape fraction candidates.
Quenching in the Early Universe
Identify and confirm the first galaxies to quench their star formation.