(Proposal ID) S12A-026 (PI) Hayashi, Masao (Proposal Title) Comprehensive survey of star formation and metallicity at z~1.5 (Abstract) Star formation activity and metal enrichment can provide us with important clues to understand processes of galaxy evolution. However, current measurements of such properties for galaxies at z~1.5 have large uncertainties and are biased toward massive galaxies due to the lack of spectroscopic samples with major nebular emission lines in rest-frame optical wavelengths. Thus, we propose deep near-infrared spectroscopy of [OII] emitters at z=1.47 and 1.62 in the Subaru Deep Field (SDF) with FMOS. We aim to detect all of H beta, [OIII], H alpha, [NII], and [SII] lines for star-forming galaxies in the epoch when galaxies and AGNs are the most active over the cosmic history. Because the redshifts of targets are already known and nebular emissions can be surely estimated from their [OII] fluxes, the emission line galaxies are ideal targets to address the issue. Also, the SDF is an ideal field because the deep multi-band data are perfectly matched to what FMOS requires for maximum efficiency. With the full set of major nebular lines, we will reveal (1) star formation activity reliably corrected for dust extinction, (2) gas metallicity, and (3) a contribution of AGNs, and investigate a correlation between them. We aim to understand critical processes which play an important role in galaxy evolution.