(Proposal ID) S13B-106

(PI) Tadaki, Ken-ichi

(Proposal Title)
Characterizing SFR indicators for z=1.7 galaxies by Subaru-ALMA joint survey

(Abstract)
We propose to perform a Halpha spectroscopy for our unique sample of [Oii] 
emitters at z = 1.7 in SXDF field with FMOS. Targets are carefully selected 
from the narrow-band imaging with Suprime-Cam on Subaru Telescope. Although 
[Oii] and [Cii] emission lines are expected to be useful as a tracer of star 
formation at highest-redshift (z > 5), they has been calibrated in only local 
Universe. Therefore, our aim is to measure the Halpha-based SFRs of star-
forming galaxies at z = 1.7 and to characterize [Oii] and [Cii] emission lines 
as SFR indicators. We have already obtained the [Oii] and UV luminosities of 
proposed targets from Suprime-Cam data. By Subaru-ALMA joint survey, we will 
measure Halpha luminosities with FMOS and measure [Cii] and far-infrared 
luminosities with ALMA. Therefore, we will obtain the 5 independent SFR 
indicators. The uniqueness of this proposal is the redshift of targets 
(z = 1.7), which is the best in order to calibrate various SFR indicators. At 
z > 1.8, Halpha line can not be proved with FMOS, and [Cii] line at z < 1.6 
can not observed by ALMA. We will also estimate the metallicities of star-
forming galaxies and investigate the relation between metallicities and [Cii] 
properties as well as characterizing SFR indicators.