S18B0078abst
S18B0078
Our recent study based on the broad-band and narrow-band (NB921) data obtained with the HSC-SSP survey has unveiled a ∼50-Mpc scale gigantic structure hosting twin clusters traced by Hα emitters at z=0.40. This is the most prominent structure ever reported in the intermediate-redshift universe, and importantly, the triple NB filters on HSC (NB527/NB921/NB926) are perfectly matched to Hα (NB921/NB926) and [OII] lines (NB527) associated to this structure. This unique NB combination allows us to measure the Hα and [OII] emission line fluxes of *all* (>3,000) member galaxies throughout the structure. While broad-band (grizy) and the NB921/NB926 data are available from the HSC-SSP data release as well as our recent open-use program (S17B-019), the NB527 data—which is critical to unveil the nature of galaxies—is missing. By completing the NB527 imaging of this super-structure, our goals are: (1) to identify the Hα+[OII] “dual emitters” along the huge cosmic web to fully map out the structure from rich cluster cores to extremely low-density (void) environment, (2) to determine the key environment responsible for triggering rise and fall of star-forming activity of galaxies, and (3) to unveil the origin(s) of “red emitters” and their environmental dependence.
This document was translated from LATEX by HEVEA.