(Proposal ID) S16A-054

(PI) Silverman, John

(Proposal Title)
FMOS-COSMOS: the final leg of a Subaru survey of high-z galaxies and AGN

(Abstract)
The wide field capability of Subaru's FMOS is unique among the near-IR multi-
object spectrographs on 8-10m class telescopes which makes it ideal for 
studying relatively rare objects such as the most massive galaxies and AGNs at 
high redshift. Before it is honorably decommissioned, we propose to ensure the 
legacy value of FMOS by exploiting this competitive edge and observe a 
substantial sample of these objects.  We can characterize the physical 
properties (i.e., SFRs, metallicities, ionization state and dust content) of 
massive (M_{stellar} > 10^{11} Msun) galaxies thus completing our effort in 
the previous semester and building upon our already successful FMOS campaign 
at lower masses. The H-long and J-long gratings allow us to detect key 
diagnostic emission lines (Halpha, [NII], Hbeta and [OIII]) from star-forming 
galaxies with 1.4 < z < 1.74. We will take advantage of the recent completion 
of the Chandra legacy program over the full COSMOS area to investigate the 
role of AGN in galaxy evolution. A final NIR spectroscopic survey of 1750 
galaxies and 400 AGN will have lasting value in one of our own key HSC 
Ultradeep survey fields.