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Minor Contribution of Quasars to Ionizing Photon Budget at z~6: Update on Quasar Luminosity Function at the Faint-end with Subaru/Suprime-Cam
Masafusa Onoue, Nobunari Kashikawa, Chris J. Willott +16
We constrain the quasar contribution to cosmic reionization based on our deep optical survey of z~6 quasars down to z_R=24.15 using Subaru/Suprime-Cam in three UKIDSS-DXS fields co…
GOLDRUSH. III. A Systematic Search of Protoclusters at Based on the Area
Jun Toshikawa, Hisakazu Uchiyama, Nobunari Kashikawa +15
We conduct a systematic search for galaxy protoclusters at based on the latest internal data release (S16A) of the Hyper SuprimeCam Subaru strategic program (HSC-SSP). I…
Clustering of quasars in a wide luminosity range at redshift 4 with Subaru Hyper Suprime-Cam wide field imaging
Wanqiu He, Masayuki Akiyama, James Bosch +25
We examine the clustering of quasars over a wide luminosity range, by utilizing 901 quasars at with photometrically se…
The Quasar Luminosity Function at Redshift 4 with Hyper Suprime-Cam Wide Survey
Masayuki Akiyama, Wanqiu He, Hiroyuki Ikeda +24
We present the luminosity function of z=4 quasars based on the Hyper Suprime-Cam Subaru Strategic Program Wide layer imaging data in the g, r, i, z, and y bands covering 339.8 deg^…
Enhancement of Galaxy Overdensity around Quasar Pairs at z<3.6 based on the Hyper Suprime-Cam Subaru Strategic Program Survey
Masafusa Onoue, Nobunari Kashikawa, Hisakazu Uchiyama +12
We investigate the galaxy overdensity around proto-cluster scale quasar pairs at high (z>3) and low (z~1) redshift based on the unprecedentedly wide and deep optical survey of the…
Luminous Quasars Do Not Live in the Most Overdense Regions of Galaxies at z~4
Hisakazu Uchiyama, Jun Toshikawa, Nobunari Kashikawa +22
We present the cross-correlation between 151 luminous quasars () and 179 protocluster candidates at , extracted from the Wide imaging survey ($…