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Enhancement of galaxy overdensity around quasar pairs at <i>z</i> &lt; 3.6 based on the Hyper Suprime-Cam Subaru Strategic Program Survey
Abstract We investigate the galaxy overdensity around proto-cluster scale quasar pairs at high (z &gt; 3) and low (z ∼ 1) redshift based on the unprecedentedly wide and deep optical survey of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). Using the first-year survey data covering effectively ∼121 deg2 with the …