040 I Scientific Highlights

The gas-phase metallicity (hereafter metallicity) is one of the important parameters in understanding the galaxy evolution. It is known that the metallicity of galaxies correlates well with the stellar mass at the local universe. The mass-metallicity relation at higher redshifts still remains unclear because of the small sample size. We carried out the NIR spectroscopic survey of star-forming galaxies at z~1.4 by using FMOS (Fibre Multi Object Spectrograph) [1] on the Subaru Telescope. We observed ~320 galaxies with K < 23.9 mag (AB), 1.2 < zph < 1.6 (zmed ~ 1.4), M∗ > 109.5 M, F(Hα)expected> 5 × 10−17 erg s−1 cm−2 in the SXDS (Subaru XMM-Newton Deep Survey) field during the FMOS/GTO. The data reduction was done with the FMOS standard pipeline [2], and the spectral fitting including the effects of OH-masks was carried out. For 71 objects, Hα emission line