(Proposal ID) S14B-008

(PI) Matsuoka Yoshiki

(Proposal Title)
 Subaru Exploration of Quasar Feedback at Cosmic High Noon

(Abstract)
Feedback from mass-accreting supermassive black holes (SMBHs) is now a 
standard ingredient in galaxy formation models. It is seen as necessary for 
prohibiting overgrowth of galaxy masses and for establishing the SMBH-bulge 
correlations. In the past several years, we have demonstrated that powerful 
ionized gas winds are a ubiquitous feature in luminous obscured z = 0.5 
quasars. We now propose to extend this discovery to the epoch of peak galaxy 
formation and quasar activity -- to the era at which feedback was most 
prominent and the SMBH-bulge  correlations were established. We request four 
nights of Subaru IRCS echelle + AO188 observations of luminous obscured 
quasars at z~2.3 to explore the spatial extents and kinematics of the ionized 
gas and to search for evidenceof quasar feedback in the form of unbound 
ionized gas outflows. We will observe [O III] lambda5007 (and possibly Hbeta) 
in the H band through longslit on sub-galactic and galaxy-wide scales (spatial 
resolution 0.5 kpc and slit length 40 kpc). Obscured quasars likely constitute 
the majority of the quasar population and may represent the relativelyearly 
enshrouded phase of the SMBH growth; thus, luminous obscured quasars are the
 most likely sites for quasar feedback, in agreement with our findings at low 
redshifts.