Mapping the large-scale structure of the Universe with emission-line galaxies from z=0.6 to 3.5: HETDEX and PFS

ABSTRACT:  We describe two unique galaxy redshift surveys to map out the large-scale structure of the Universe from z=0.6 to 3.5. Both will use the prime focus of large-aperture telescopes for wide fields of view. One is HETDEX, the on-going survey on 10-m Hobby-Eberly Telescope in West Texas, and the other is PFS, the planned survey on 8.2-m Subaru Telescope in Hawaii. We use Lyman-alpha emitters (HETDEX) and [OII] emitters (PFS) for z=1.9-3.5 and 0.6-2.4, respectively. The HETDEX is a super unique, non-traditional survey: we use integral field unit spectrographs (IFUs) to do the first blind emission-line surveys in a cosmological volume, without pre-selecting objects by imaging surveys. The PFS will use the highly multiplexed robotic multi-object fibre spectrograph. We describe the motivation for the projects, science goals, survey designs, as well as the current status of both projects.