(Proposal ID) S14A-124

(PI) Kashikawa Nobunari

(Proposal Title)
 Systematic study of QSO radiative feedback in high-z Universe

(Abstract)
We propose an extended study of our past observation for QSO J0210-0018 at z = 
4.89, in which we have obtained a clear trend that LAEs distribute in a ring-
like structure around the QSO to avoid its nearby. This result implies that 
strong UV radiation feedback from the QSO acts as a photoevaporation that 
effectively make a deficit for low-mass galaxies like LAEs. We'd like to carry 
out a wide field imaging with Suprime-Cam targeting for 11 regions under local 
strong UV background by QSOs at 2 < z < 3 in order to systematically study the 
radiative feedback effect on the LAEs as the same situation as of J0210-0018. 
The deep and wide broad-band and narrow-band imaging would reveal the variation
 of perspective LAE clustering structures. In this study, we will study 
(1) the luminosity and clustering differences of LAEs between QSO regions and 
the fields, (2) possible correlation between these properties and the distance 
from the QSO, (3) a comparison of these characteristics among the target QSOs 
with wide luminosity ranges to see the difference related to the strength of 
UV background radiation, and (4) the possible correlation between the LAE 
clustering and the SMBH mass and the Eddington ratio to understand the 
feedback timescale.